bai giang khoa asp.net - khoa 2009-color
TRANSCRIPT
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
MC LCI. L thuyt.............................................................................................................51.1 Gii thiu.......................................................................................................................5 1.2 Danh sch cc phn t HTML thng dng..................................................................5
II. Bi tp thc hnh..............................................................................................71. Yu cu:...........................................................................................................................7 2. Hng dn........................................................................................................................8 3. Minh ho mu..................................................................................................................8 4. Ghi ch.............................................................................................................................9
BI S 2: To trang web ng vi DHTML v JavaScript...............................................10 I. L thuyt...........................................................................................................101. a cu lnh javascript vo trang web..........................................................................10 2. a cu lnh javascript vo t mt file ring bit.........................................................11 3. Truy cp cc phn t HTML bng cu lnh Javascript.................................................12 4. Xy dng hm trong Javascript......................................................................................13 5. Mt s hm thng dng ca Javascript..........................................................................14
II. Thc hnh........................................................................................................141. Yu cu..........................................................................................................................14 2. Hng dn......................................................................................................................14 3. Minh ho mu................................................................................................................14 4. Ghi ch...........................................................................................................................17
BI 3: THAY I NI DUNG TRANG WEB BNG CSS V JS NH DNG TRANG WEB VI CSS..............................................................17 I. L thuyt...........................................................................................................171. nh dng CSS ngay trong nh ngha phn t (Gi l Inline)......................................18 2. nh dng CSS thng qua lp........................................................................................18
II. Thc hnh........................................................................................................201. Yu cu..........................................................................................................................20 2. Hng dn......................................................................................................................20 3. Minh ho mu................................................................................................................21 4. Ghi ch...........................................................................................................................24
BI 4 (Tip): THAY I NI DUNG TRANG WEB BNG CSS V JS NH DNG TRANG WEB VI CSS..............................................................25 I. L thuyt...........................................................................................................251. Tham chiu n mt phn t trong trang web...............................................................25 2. Tham chiu n mt thuc tnh ca phn t..................................................................26 3. Thay i ni dung ca mt phn t...............................................................................26
II. Thc hnh........................................................................................................271 Yu cu...........................................................................................................................27 2 Hng dn.......................................................................................................................28 V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.1
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin 3 Minh Ho mu................................................................................................................28 4 Ghi ch............................................................................................................................33
BI S 5: ASP.NET v Web form.....................................................................33 I. L thuyt...........................................................................................................331. M hnh lp trnh pha my ch.....................................................................................33 2 C ch x l file ASP.NET pha my ch......................................................................36 3 Mt s v d minh ha....................................................................................................39 4 Webform trong ASP.NET...............................................................................................42 5 Tm hiu cu trc trang ASP.NET..................................................................................42 6. Code behind v vit code pha Server............................................................................46 7. HTML Server Controls v Web controls.......................................................................47
II. Thc hnh........................................................................................................481. Yu cu..........................................................................................................................48 2. Hng dn......................................................................................................................49 3. Minh ho mu................................................................................................................49 4. Ghi ch...........................................................................................................................54
BI 6: Cc i tng trong ASP.NET...............................................................55 I. L thuyt...........................................................................................................551. Request Object...............................................................................................................55 2 Response Object..............................................................................................................58 3 Server Object...................................................................................................................60 4 Session Object.................................................................................................................61 5 Application Object..........................................................................................................61
II. Thc hnh........................................................................................................621. Bi 1: To mt trang Login............................................................................................62 2. Bi 2: To mt trang m s lng ngi truy cp. .....................................................67
BI 7: CNG NGH ADO.NET........................................................................69 I. L thuyt...........................................................................................................691. Gii thiu chung ............................................................................................................69 2. Kin trc ca ADO.NET................................................................................................70 3. Cc lp thao tc vi CSDL: Connection, Command,................................................71
II. THC HNH..................................................................................................841. To c s d liu ...........................................................................................................84 2. Nhp d liu cho bng. .................................................................................................85 3. Hin th d liu trong bng ln trnh duyt....................................................................88 4. Cp nht d liu bng DataSet v DataAdapter.............................................................89
BI 8: Tm hiu v ng dng c ch Data Binding...........................................91 I. L thuyt...........................................................................................................911 Gii thiu DataBinding...................................................................................................91 2 Data Binding...................................................................................................................91 3. Cc iu khin Data Source (Data source controls).......................................................95
II. THC HNH................................................................................................104 BI 9: Lm vic vi GridView..........................................................................108V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319 P.2
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
I. L thuyt.........................................................................................................1081. Gii thiu tng quan.....................................................................................................108 2. Tm hiu lp GridView ...............................................................................................108 3. Cc tnh nng h tr ca GridView.............................................................................112 4. To cc ct ty bin HyperLink, BoundColunm.....................................................116 5. To v x l cc ct Select, Edit, Delete, Update....................................................120
II. Thc hnh......................................................................................................124 BI 10: S dng Templates..............................................................................131 I. L thuyt.........................................................................................................1311. Gii thiu tng quan.....................................................................................................131 2. Cc iu khin h tr Templates.................................................................................131 3. Repeater control, DataList control, GridView control.................................................132
II. THC HNH................................................................................................1391. Bi 1: Hin th danh sch cn b .................................................................................139 2. Bi 2: B sung thm trng vo bng..........................................................................141 3 Bi 3: Hin th danh sch cn b dng chi tit. ............................................................142 4. Bi 4: Hin th danh sch ngi dng di dng Flow (tuyn tnh) ...........................143 Bi 5: Hin th thng tin km Hyperlink..........................................................................147 Bi 6: Thc hin phn trang.............................................................................................148
PH LC...........................................................................................................150 I. NG GI WEBSITE..................................................................................150 II. CI T H THNG IIS H TR ASP.NET WEBSITE......................1501. Ci t IIS....................................................................................................................150 2. Ci t .NET Framework.............................................................................................150
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.3
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
TRUNG TM HNG YN APTECHa ch in thoi E-mail Website : : : : Tng 2, Nh A i hc SPKT Hng Yn 0321-713.319; Fax: 0321-713.015 [email protected]; http://www.aptech.utehy.vn
TI LIU KHA HC LP TRNH ASP.NETBin son: - Nguyn Minh Qu - L Quang Li
HNG YN 7/2009V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.4
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
PHN I C bn v HTML, DHTML, JavaScriptBI S 1: To trang web vi HTMLMc tiu: Kt thc bi hc, sinh vin c th To c trang web tnh trn notepad/ HTML Editor nh dng ni dung trang web bng cc phn t HTML c bn Thao tc c vi phn t bng (Table), , ,....
Ni dung
I. L thuyt1.1 Gii thiuMt trang web khi c hin th trn trnh duyt (IE; FireFox; Netscape,...) v bn cht c to t cc cp th (tag) c bit. Cc th ny s ch dn cho trnh duyt bit nn hin th ni dung nh th no. V d cp th ... s ch dn cho trnh duyt phi in m ni dung bn trong, v.v... Mi cp th nh vy gi l cp th HTML (Hyper Text Markup Language). V vy, i vi mi lp trnh vin web, trc khi mun xy dng ng dng web thc th th khng ch phi hiu rt r nhng cp th HTML (t nht l nhng cp th c bn) m cn phi bit cch Code (to) cc cp th ny.
1.2 Danh sch cc phn t HTML thng dngDi y l danh sch cc phn t HTML c bn v cch to ra tng ng bng cp th HTMLSTT Phn t Input Button CheckBox Radio button Hnh th hin th trn trang web Cch to ra bng th HTML tng ng Yes CheckBox1 Nam Nguyn Vn A Nguyn Vn B Nguyn Vn C Nguyn Vn A Nguyn Vn B Nguyn Vn C
List Danh sch (Combo Box)
Nguyn Vn A
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.5
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton Tin Phn cch xung dng L
mt phn t cha cc phn t khc. Khi n/ hin/ di chuyn... phn t div th cc
phn t khc cng n/hin/di chuyn theo...
11 12 21 22 Th TR phi nm trong mt no , khng th to ring
div
Table
11 21
12 22
TR
TD
Th TD phi nm trong mt no , khng th to ring. ....
Trn hai ct
=>
.... 1 2 3 1 23 1 2 www.aptech.utehy.vn
Trn 2 hng
=>
a img
www.aptech.utehy.vn
Ch : Thuc tnh t cho cc phn t c vit di dng: =. Phn c t trong cp du nhy n hoc cp du nhy kp.
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.6
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
II. Bi tp thc hnh1. Yu cu:To mt trang web hin th ni dung nh sau:
Giao din trang web cn to
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.7
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
2. Hng dnS dng bng m t cc phn t trn to trang theo yu cu. Vo trnh son tho web ca Visual Studio 2008 v to d n web, sau m trang Default.aspx v vit cc th HTML. chy (m) trang web va to, c th nhn F5 hoc click chut phi trong trang son tho (hoc tp Default.aspx bn panel phi), sau ch "View in Browser".
3. Minh ho muDefault.aspx Bi thc hnh s 1 - Hng Yn Aptech
PHN MM QUN L BN HNG NHP THNG TIN NH CUNG CP Tn nh cung cp:
Ngi i din: Chc v:
a ch Nh CC:
Thnh ph : ----Chn---- H ni TP H Ch Minh Nng Hi Phng Hng Yn Hi Dng
Qung Ninh Ni khc Vng:
M bu in:
Quc gia: Vit Nam Lo Campuchia Ni khc
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.8
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton Tinin thoi: S
Fax:
a ch website:
Danh sch nh cung cp hin c M NCC Tn NCC a ch Homepage 1 Cng ty FPT
Lng H - Ba nh www.fpt.vn 2 Cng ty CMC Hn Thuyn - Hai B Trng
www.cmc.vn 3 Cng ty Trn Anh Ging v - Ba nh www.trananh.vn
4. Ghi ch
thc hin xo (reset v trng thi u) ca mt form nhp liu, ta to phn t button nhng t "type" l "reset" (thay v type = "button). gi ton b ni dung d liu nhp v server x l, to phn t button nhng t "type" l "submit" (thay v type = "button") chn mc nh mt mc trong danh sch (Select) th c thuc tnh l "Selected" cho mc . to hp text c nhiu dng, ta dng th . Mun thay i rng ca textbox, ch cn thay i thuc tnh "size". C th b tr li trang web trn cho p hn bng cch t cc phn t trong cc ca bng (s dng th Table).P.9
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
BI S 2: To trang web ng vi DHTML v JavaScriptMc tiu: Kt thc bi thc ny, ngi hc c th Truy xut cc i tng trnh duyt v cc phn t HTML bng JavaScript. To trang web ng k c x l tnh hp l ca d liu nhp vo. Ni dung:
I. L thuytMt trang web c to bi trc c gi l mt trang web tnh (Static webpage - tc l: Ni dung ca n mt khi c to ra th lun lun hin th ging nhau i vi mi ngi dng mi thi im). Tuy nhin, ngy nay do nhu cu ca ngi dng v ca ng dng nn mt trang web phi c kh nng ng (Dynamic webpage - tc l: ni dung ca trang web c th hin th, ng x khc nhau ng vi ngi s dng hoc tnh hung khc nhau...). Kh nng "ng" c th thc hin bn pha trnh duyt hoc pha server. Nu trang web cho php thc hin thay i (bng ngn ng kch bn nh VBScript, JavaScript...) bn pha trnh duyt, gi l trang DHTML (Dynamic HTML); cn nu trang web thc hin x l bn pha server (bng ngn ng C#, VB.NET, ASP, PHP, Perl,...) gi l cc trang ng pha server (Active Server Page). Trong ti liu ny chng ta s tm hiu c hai dng web ng trn, cn trong bi ny ta s tm hiu trang DHTML vi Javascript (JS).
1. a cu lnh javascript vo trang web1.1 a cu lnh javascript vo lung x l ngay khi trang web c m. a cc cu lnh Javascript vo trang web v yu cu trnh duyt thc thi ngay khi trang web c m, ta ch cn t cc cu lnh JS ngay trong cc cp th ..... nhng khng hm. V d: Hin th mt li cho v thng bo ngy hin ti khi trang web c m. var d = new Date (); document.write ("Cho bn ! "); document.write("Hm nay l: " + d.toDateString()); ** Ch : C th c nhiu on script trong mt trang. Trong cp script phi l cc CU LNH JAVASCRIPT V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319 P.10
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin Nhng cu lnh JS nu khng nm trong cc hm th s c thc hin ngay khi trang web c m. 1.2 a cu lnh javascript vo cc s kin (event) Nh phn 1.1 th cc cu lnh JS s c thc thi ngay khi trang web c m, tuy nhin c nhng lc ta mun n ch c thc hin khi mt s kin no xy ra, nh click chut, nhn phm ...Trong trng hp ny n gin l ta a cu lnh vo s kin tng ng theo c php: ... = "Danh sch cu lnh JS c cch nhau bi du chm phy".... V d: Hin th li cho v thng bo ngy hin ti khi ngi dng nhn vo nt "Hello": *** Thc t, rt t khi ngi ta a qu nhiu cu lnh vo ngay bn trong s kin nh trn, m thng a cc cu lnh ny vo mt hm, sau vit cu lnh gi hm trong s kin.
2. a cu lnh javascript vo t mt file ring bit.Trong cc ng dng ln, s hm, cu lnh JS cng s rt ln, v vy nu cc hm ny ngay trong file HTML nh trn s kh bo tr v khin cho vic chia s gp kh khn. khc phc hn ch ny, ngi ta thng t cc hm JS trong mt tp ring, sau ch vic gi cc hm ny trong trang HTML. V d: To mt file cha cc hm JS Cng v tr trong mt file c tn l MyMath.js, sau gi cc hm ny trong trang web c tn l TestJS.htm. Vic "nhng" cc trang *.JS vo trang html thng qua thuc tnh "src".
File MyMath.js//Hm cng hai s nguyn function Cong(a,b) { return a+b; } //Hm tr hai s nguyn function Tru(a,b) { return a-b; } V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.11
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
File TestJS.htm Lession 02 alert ("1+1 = " + Cong(1,1)); alert ("10-2 = " + Tru (10,2));
3. Truy cp cc phn t HTML bng cu lnh JavascriptTrong JS, c th truy xut (c/ ghi) cc bin hoc cc phn t trn trang web (nh button, textbox, select, checkbox, radio button,... hoc phn t bt k). Vic truy xut n phn t tun theo c php chung nh sau: + Document.., hoc: + Document.forms[Ch s]., hoc: + Document.getElementById(). Khi truy xut n phn t, ta c th truy xut n cc thuc tnh ca n c/ ghi nh sau: .. Lession 02 function ThucHien() { var a = parseFloat(document.form1.txtSH1.value); var b = parseFloat(document.form1.txtSH2.value); document.form1.txtTong.value = a+b; } Chng trnh tnh tng V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.12
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton Tin S hng 1:
S hng 2:
Tng:
*** Theo v d trn, truy xut (tham chiu) n phn t txtSH1 v txtSH2 ta
vit: document.form1.txtSH1 v document.form1.txtSH2. Cn truy xut n
thuc tnh value (cha ni dung ca textbox), ta ch cn thm thuc tnh
Value vo sau tham chiu, c th vit: document.form1.txtSH1.value Ngoi
ra c th vit theo cch khc nh sau: ..................... function
ThucHien() { var a = parseFloat(document.forms[0].txtSH1.value);
var b = parseFloat(document.forms[0].txtSH2.value);
document.getElementById("txtTong").value = a+b; }
............................ bit danh sch cc thuc tnh ca phn t tng
ng, c th tra cu trn Internet (v d trng www.w3schools.com) hoc
search: "Javascript reference"
4. Xy dng hm trong JavascriptTrong Javascript, c th xy dng cc hm ging nh cc ngn ng lp trnh khc. Tuy nhin c mt s s khc bit, c th: - Hm khng c kiu tr v - Danh sch tham s khng c kiu V d: Vit mt hm tnh lu tha ca mt s xy Lession 02 function LuyThua(x, y) { var KQ = Math.pow (x,y); return KQ; } function ThucHien() { var x,y; x=document.getElementById("txtX").value ; y=document.getElementById("txtY").value ; document.getElementById("txtXMuY").value = LuyThua (x,y); }
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.13
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton Tin Chng trnh tnh lu
tha C s:
S m:
Kt qu (XY):
5. Mt s hm thng dng ca Javascript- Hm write(): in kt qu ra trang web. - Hm alert(): Thng bo trong mt hp thoi ring. - Hm prompt(): yu cu nhp thng tin t ngi dng. - Hm confirm(): Yu cu ngi dng xc nhn. - Hm open(): m mt trang web. - Hm x l ton hc: nh Sin, cos, abs, pow, .... nm trong i tng Math. - Hm x l xu: SubStr, Length, toLower.... c sn i vi mi xu. - Hm chuyn xu sang s nguyn, thc: pareInt(); pareFloat(). - Hm tnh gi tr ca mt biu thc: eval().
II. Thc hnh1. Yu cuSp xp li trang web trong bi thc hnh 1 di dng bng sau vit th tc x l s kin click ca nt submit , theo yu cu sau y: Nu d liu hp l th thc hin submit Nu d liu nhp vo khng hp l th thng bo cho ngi dng v khng thc hin submit. D liu nhp vo c gi l khng hp l nu gp mt trong cc trng hp sau: Tn nh cung cp trng Thnh ph khng c chn in thoi cha k t khng phi l s a ch website khng ng.
2. Hng dn2.1 hu mt s kin ca mt phn t bt k, ch cn thm cu lnh "return false;" trong phn cu lnh x l s kin tng ng. 2.2 S dng cc hm kim tra s IsNaN() (true = khng phi l s, false=ng l s) 2.3 S dng cc hm x l xu. 2.4 Vit di dng cc hm.
3. Minh ho muFile Default.aspx
Bi thc hnh s 2 - Hng Yn Aptech V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.14
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton Tin function
KiemTraDuLieu() { if (document.getElementById("txtNCC").value ==
"") { alert ("Bn phi nhp tn nh cung cp !"); return false ; } if
(document.getElementById("lstCity").selectedIndex == 0)| { alert
("Bn cha chn Thnh ph !"); return false ; } if
(isNaN(document.getElementById("txtTelephone").value) == true ) {
alert ("S T ch cha k t s
!"+document.getElementById("txtTelephone").value); return false; }
var
homepage=document.getElementById("txtHomepage").value.toLowerCase()
if (homepage.indexOf("http://")==-1) { alert ("a ch website khng
ng, hy nhp theo dng http://"); return false; } return true; //d liu
nhp hp l. }
PHN MM QUN L BN HNG NHP THNG TIN NH CUNG CP Tn nh cung cp: Ngi i
din: Chc v: a ch Nh CC: Thnh ph : ----Chn----
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.15
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton TinH ni TP H Ch Minh
Nng Hi Phng Hng Yn Hi Dng Qung Ninh Ni khc Vng: M bu in: Quc gia:
Vit Nam Lo Campuchia Ni khc in thoi: S Fax: a ch website:
Danh sch nh cung cp hin c M NCC Tn NCC a ch Homepage 1
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel: 03213-713.319
P.16
Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton TinCng ty FPT Lng H - Ba nh www.fpt.vn 2 Cng ty CMC Hn Thuyn - Hai B Trng www.cmc.vn 3 Cng ty Trn Anh Ging v - Ba nh www.trananh.vn
4. Ghi chC th tra cu cc thuc tnh, phng thc, s kin ca cc phn t (Select, command, checkbox,...) ti: www.w3schools.com http://developer.netscape.com/docs/manuals/js /client/jsguide/index.htm http://developer.netscape.com/docs/manuals/ja vascript.html hoc bn mm i km kha hc.
BI 3: THAY I NI DUNG TRANG WEB BNG CSS V JS NH DNG TRANG WEB VI CSSMc tiu sau khi kt thc bi hc Trnh by c cch nh ngha CSS kiu dng v lp. S dng CSS v bng thuc tnh CSS nh dng cho phn t bt k. nh dng li trang thng tin sn phm bng CSS, m bo tnh m thut v k thut.
I. L thuytTrc y, ngi ta thng dng cc c php c nh dng cc phn t trn
trang web (v d in m, t font ch, v.v...). Tuy nhin cch t trc y c
nhiu im hn ch v vy hin nay trong lp trnh ch yu s dng c php nh dng
mi gi l CSS (Cascading Style Sheet = bng nh kiu). C nhiu cch nh kiu
cho phn t web bng CSS, tuy nhin thc t hay s dng cch nh dng sau y:
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319P.17Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin1.
nh dng CSS ngay trong nh ngha phn t (Gi l Inline)Vi cch ny, khi mun
nh dng cho mt phn t/ th bt k no ngi ta nh ngha CSS ngay trong phn
t/ th . V d1: nh ngha ni dung th H2 c mu ch , font ch nghing nh
sau: Mu , ch nghing V d2: nh ngha nt nhn "Yes" c nn , c ch 16pt nh
sau: Ch : Ni dung trong style cha cc cp : v cch nhau bi du hai chm.
Danh sch cc thuc tnh v gi tr cng nh ngha ca mi thuc tnh c th tra
trong bng (bn mm km kho hc) hoc vo tm kim trn internet:
http://www.w3schools.com/CSS/CSS_reference.asp hoc trang
http://www.javascriptkit.com/dhtmltutors/cssreference.shtml Vi cch
ny ta phi nh ngha ring cho tng phn t, khng s dng li c v mt thi gian
bo tr. Thng c s dng cho nhng phn t c nh dng ring.2. nh dng CSS thng
qua lpCch th hai linh hot hn v thng p dng cho cc trang web ln, l
ngi ta nh ngha sn mt s CSS gi l lp (class), sau c th p dng lp ny
cho cc phn t mong mun. Phn nh ngha CSS ny c t trong cp th ... . nh
ngha: ..... . { Tn_Thuc_tnh_1: Gi_tr_1; Tn_Thuc_tnh_2: Gi_tr_2;
.................................... } S dng: V d: nh ngha 2 lp
MC_LN v MC_NH, sau p dng nh dng ni dung mc lc ca mt cun ti liu. Lp
MC_LNc 2 thuc tnh: Mu ch m, c ch 16 Lp MC_NH c 3 thuc tnh: Mu ch m,
in nghing, c ch 14V2.0 http://www.aptech.utehy.vn;
[email protected]; Tel: 03213-713.319P.18Ti liu kha hc lp trnh
web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tin CSS .MC_LN { font-weight:bold;
font-size:16pt; }.MC_NH{ font-weight:bold; font-size:14pt;
font-style:italic; } Mc lc Bi 1: To trang web tnh vi HTML
1.1 L thuyt
1.2 Thc hnh
Bi 2: S dng JavaScript
2.1 L thuyt
2.2 Thc hnh
Bi 3: To trang web tnh vi CSS & JS
3.1 L thuyt
3.2 Thc hnh Kt qu cho ta:Mc lcBi 1: To trang web tnh vi HTML1.1 L
thuyt 1.2 Thc hnhBi 2: S dng JavaScript2.1 L thuyt 2.2 Thc hnhBi 3:
To trang web tnh vi CSS & JS3.1 L thuyt 3.2 Thc hnhV2.0
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Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin **
u im ca nh ngha lp ny l ta ch phi nh ngha mt ln, sau s dng cho nhiu
phn t. Vic bo tr v sa cha s d dng v nhanh chng hn. Ngoi ra, ngi ta
c th nh ngha CSS trong mt tp ring, sau c th s dng trong tt c cc
trang khc nhau. s dng (gi) cc CSS nh ngha trong mt file xyz.css no
, ta ch cn khai bo nh sau trong phn Head: *Ch : Ni dung trang css
ch cha nh ngha cc lp, khng c th kiu nh II. Thc hnh1. Yu cuVit li
trang nhp thng tin nh cung cp cc bi hc trc nhng s dng CSS nh ngha
li cc phn t. Kt qu sau cng cn t ti t nht phi nh sau:Giao din kt
qu2. Hng dn- S dng nh dng CSS ti dng v to lp CSS. - Cc phn t c cng
thuc tnh th nn to mt lp ring, sau p dng lp ny cho th bng thuc tnh
Classs= . V2.0 http://www.aptech.utehy.vn; [email protected];
Tel: 03213-713.319P.20Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin -
Tra cu bng CSS trong bn mm i km hoc trang .www.w3schools.com3. Minh
ho mu CSS .Nhn { font-style:italic; font-size:12pt; color:Gray;
text-align:right; width:150px; padding-right:5px; } .Bng {
border-collapse:collapse; border-style:solid ; border-width:1px;
border-color:gray; margin-left:auto; margin-right:auto;
width:600px; } td { padding:3px; } td.CnhPhi { border-right:solid
1px gray; } .TiuNCC { text-align:center; border-right:solid 1px
gray; border-bottom:solid 1px gray; } NHP THNG TIN NH CC V2.0
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03213-713.319P.21Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin Tn
Nh CC Ngi i din Chc v in thoi a ch NCC Thnh ph: ----Chn---- H ni TP
H Ch Minh Nng Hi Phng Hng Yn Hi Dng Qung NinhV2.0
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Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton TinNi
khc Vng: M bu in: Quc gia: Vit Nam Lo Campuchia Ni khc in thoi: S
Fax: a ch website
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319P.23Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin
Danh sch nh cung cp hin c M NCC Tn NCC a ch Homepage 1 Cng ty FPT
Lng H - Ba nh www.fpt.vn 2 Cng ty CMC Hn Thuyn - Hai B Trng
www.cmc.vn 3 Cng ty Trn Anh Ging v - Ba nh www.trananh.vn 4. Ghi
chNu mun ly gi tr ca mt mc trong Listbox (Select) th vit:
.options[Ch s ca mc].text ly phn Text (phn hin th) hoc vit:
.options[Ch s ca mc].value ly phn value. margin-left, margin-right
= "auto". Mun t bng vo gia form, t thuc tnhCc th con c tnh k tha th
cha, tc l: Khi th cha (th cha) nh ngha mt thuc tnh A no th cc th
con cng c c tnh A. V d: nu ta vit Mu g? Mu xanh th tt cc cc ni dung
ca th h2 v h3 u c mu xanh. (Tr phi chnh th h2 hay h3 nh ngha li).
trnh by c tt d liu di dng hng, ct (bng) th cn phi hiu rt r cc thuc
tnh qui nh cch thc hin th ca cc phn t nh TD, TR, TABLE. C th tham
kho y v vn ny ti: V2.0 http://www.aptech.utehy.vn;
[email protected]; Tel: 03213-713.319P.24Ti liu kha hc lp trnh
web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tin http://www.w3schools.com/CSS/ . c bit mi phn
t u c cc thuc tnh hin th nh Margin, Border, padding. Mun hin th ng
cn nm c ngha ca cc khi nim ny.border-right Margin-left
padding-bottomM hnh biu din khi nim margin, border, padding S dng
CSS khi c nhiu phn t c cng nh dng ging nhau trong trang/ ng dng
web.BI 4 (Tip): THAY I NI DUNG TRANG WEB BNG CSS V JS NH DNG TRANG
WEB VI CSSMc tiuI. L thuyt1. Tham chiu n mt phn t trong trang web c
hay thay i ni dung hay thuc tnh ca phn t bt k th iu cn lm trc tin l
phi tham chiu n phn t . Vi mi trnh duyt khc nhau c th c cc cch khc
nhau, tuy nhin cch truy cp sau y tng thch vi hu ht cc trnh duyt.
tham chiu n mt phn t, c th dng 2 cch ph bin sau: 1.1 Dng hm
getElementById("Gi tr thuc tnh id ca phn t") V d, c phn t: Chng I .
Nu mun tham chiu (truy xut) n phn t H1 ny, ta vit:
document.getElementById("TieuDe"). Khi truy xut n phn t no th ta
hon ton c th c hoc thay i ni dung/ thuc tnh ca n. 1.2 Dng hm
getElementsByTag("Tn ca th"). Hm ny tr v mt mng cha cc phn t c cng
loi/ tn (th) nm trong phn t. Ch : bt k phn t no cng c phng thc
getElementByTag, v vy khi ta vit document.getElementsByTag s tr v
cc phn t nm trong document, nu ta vit form1.getElementsByTag th tr
v cc phn t nm trong form, v.v... V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin 1.3 Truy xut n tt c cc phn t con ca mt phn t
bt k. Mi phn t u c thuc tnh childNodes (mng) cha cc nt con nm bn
trong n. V vy c th dng vng lp duyt tt c cc phn t bn trong n. Thuc
tnh ChildNodes li c mt thuc tnh con l length cho bit s phn t bn
trong (phn t u c ch s 0).2. Tham chiu n mt thuc tnh ca phn tKhi
tham chiu c n phn t th vic tham chiu n thuc tnh kh d dng, c th vit
theo c php sau: .. V d: ( y, type, value v id l cc thuc tnh ca th
input). Nu mun truy xut n thuc tnh value, ta vit:
document.getElementById("button1").value.3. Thay i ni dung ca mt
phn t3.1 Qui nh v vic vit tn thuc tnh Trong cc bi trc, khi nh ngha
style cho mt phn t, tn thuc tnh c th c cha du "-", v d: Hello . Tuy
nhin khi x l trong cc cu lnh Javascript th thuc tnh ny cn vit li
theo qui tc sau: Chuyn ch ci ngay sau du "-" thnh ch hoa sau b du
tr ny i. V d tn thuc tnh trn s vit li thnh fontSize v
backgroundColor. 3.1 Thay i thuc tnh ca phn t C php: . = V d c phn
t: , sau mun thay ni dung "Click here bng "Thc hin" th vit nh sau:
document.getElementById("button1").value= "Thc hin". **Ch : C nhng
thuc tnh ch c nh thuc tnh "type" chng hn. 3.2 Thay i style ca phn t
bng Javascript Khi nh ngha phn t, mi style cha cc thuc tnh ring (v
d: Hello ), lc nu mun thay i cc thuc tnh ca style th vit nh sau:
document.getElementById().style. =. Ch : tun th cch t tn trn. V d:
t mu nn cho phn t hello trn thnh mu , nh sau:
document.getElementById("hello").style.backgroundColor = "red";V2.0
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Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton TinII.
Thc hnh1 Yu cu1.1 V giao dingiao din trang web 1.2 Yu cu v chc nng/
x l - Khi ngi dng click vo nt "Thm mi", h thng s thm bn ghi vo danh
sch NCC pha di nu d liu hp l, tip theo xo cc nhp v a focus v Tn nh
CC. - Trng hp d liu khng hp l (Tn NCC trng, cha chn thnh ph, in
thoi cha k t ngoi s, a ch website khng bt u bng http://) th a ra
thng bo, sau t focus vo v tr nhp sai km t nn mu vng.V2.0
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Hng dn t nn vng, truy cp vo thuc tnh backgroundColor ca style thuc
phn t tng ng. thng bo, dng hm alert xo form, gi phng thc reset() ca
form. thm mt hng vo bng, thc hin trnh t: + thm hng (row hay tr) mi:
Gi phng thc insertRow(V tr cn thm) ca bng + thuc tnh rows.length ca
bng cho bit s phn t (hng trong bng) - thm mt (cell hay ) vo hng,
dng phng thc insertCell(th t ) ca i tng row. t thuc tnh con trong
thuc tnh style ca mi , ta li s dng c php truy cp nh phn 3.23 Minh
Ho mu CSS .Nhn { font-style:italic; font-size:12pt; color:Gray;
text-align:right; width:150px; padding-right:5px; } .Bng {
border-collapse:collapse; border-style:solid ; border-width:1px;
border-color:gray; margin-left:auto; margin-right:auto;
width:600px; } td { padding:3px; } td.CnhPhi { border-right:solid
1px gray; } .TiuNCC { text-align:center;V2.0
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Tinborder-right:solid 1px gray; border-bottom:solid 1px gray; }
function AddRow() { if (KiemTraDuLieu() == false ) return false;
var tbl=document.getElementById ("tblDSNCC"); var
row=tbl.insertRow(tbl.rows.length); var cell=row.insertCell(0);
//Ct m nh cung cp cell.innerHTML=tbl.rows.length-2;
cell.style.color="blue"; cell.style.textAlign="center";
cell.style.borderRightStyle="solid";
cell.style.borderRightColor="gray";
cell.style.borderRightWidth="1px"; //Ct Tn nh cung cp
cell=row.insertCell(1); cell.innerHTML=
document.getElementById("txtNCC").value ; cell.style.color="blue";
cell.style.textAlign="left"; cell.style.borderRightStyle="solid";
cell.style.borderRightColor="gray";
cell.style.borderRightWidth="1px"; //Ct a ch nh cung cp
cell=row.insertCell(2); cell.innerHTML=
document.getElementById("txtDiaChi").value ;
cell.style.color="blue"; cell.style.textAlign="left";
cell.style.borderRightStyle="solid";
cell.style.borderRightColor="gray";
cell.style.borderRightWidth="1px"; //Ct a ch website
cell=row.insertCell(3); var URL=
document.getElementById("txtHomePage").value ; cell.innerHTML= "" +
URL + ""; cell.style.color="blue"; cell.style.textAlign="left";
cell.style.borderRightStyle="solid";
cell.style.borderRightColor="gray";
cell.style.borderRightWidth="1px"; // Nu mun gi i th vit cu lnh //
document.forms["form1"].submit(); //xo form nhp bn ghi mi
document.getElementById ("form1").reset(); document.getElementById
("txtNCC").focus (); } //Hm kim tra d liu nhp vo c hp l hay khng.
tr v true nu hp l.V2.0 http://www.aptech.utehy.vn;
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web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tinfunction KiemTraDuLieu() { if
(document.getElementById("txtNCC").value == "") { alert ("Bn phi
nhp tn nh cung cp !"); document.getElementById("txtNCC").focus();
document.getElementById("txtNCC").style.backgroundColor="yellow";
return false ; } if
(document.getElementById("lstCity").selectedIndex == 0) { alert
("Bn cha chn Thnh ph !");
document.getElementById("lstCity").focus();
document.getElementById("lstCity").style.backgroundColor="yellow";
return false ; } if
(isNaN(document.getElementById("txtTelephone").value) == true ) {
alert ("S in thoi phi l cc k t s ! ");
document.getElementById("txtTelephone").focus();
document.getElementById("txtTelephone").style.backgroundColor="yellow";
return false; } var
homepage=document.getElementById("txtHomePage").value.toLowerCase()
if (homepage.indexOf("http://")==-1) { alert ("a ch website khng
ng, hy nhp theo dng http://");
document.getElementById("txtHomePage").focus();
document.getElementById("txtHomePage").style.backgroundColor="yellow";
return false; } return true; //d liu nhp hp l. } function
ClearBackgroundColor(objToClear) {
objToClear.style.backgroundColor="white"; } NHP THNG TIN NH CC Tn
Nh CC V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319P.30Ti liu kha hc lp trnh web vi ASP.NET Bin son:
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i din Chc v in thoi a ch NCC Thnh ph: ----Chn---- H ni TP H Ch Minh
Nng Ni khc Vng: V2.0 http://www.aptech.utehy.vn;
[email protected]; Tel: 03213-713.319P.31Ti liu kha hc lp trnh
web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tin M bu in: Quc gia: Vit Nam Lo Campuchia Ni
khc in thoi: S Fax: a ch website
Danh sch nh cung cp hin c V2.0 http://www.aptech.utehy.vn;
[email protected]; Tel: 03213-713.319P.32Ti liu kha hc lp trnh
web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton TinM NCC Tn NCC a ch Homepage 1 Cng ty FPT Lng H
- Ba nh www.fpt.vn 2 Cng ty CMC Hn Thuyn - Hai B Trng www.cmc.vn 3
Cng ty Trn Anh Ging v - Ba nh www.trananh.vn 4 Ghi chMi phn t (th)
u c thuc tnh innerHTML. thuc tnh ny chnh l phn nm gia th ng v th m.
V d vi Hello world , th innerHTML chnh l : "Hello world ". y l c s
ta thay i ni dung ca trang web. Hy lun ghi nh, thay i ni dung/ thuc
tnh/ style ca phn t th trc ht phi truy cp/ tham chiu c n phn t .
Cch truy cp hay dng l hm document.getElementById("Id ca th").BI S
5: ASP.NET v Web form I. L thuyt1. M hnh lp trnh pha my chTrong th
gii web, tt c cc giao tip gia Client (trnh duyt) v Server (web
server) u c thc hin theo c ch Request and Response. Tc l, trc tin
pha my khch cn phi requesst (gi yu cu) ti Server, sau pha server s
response (hi p) li yu cu. Cng mt c ch ny, ngi ta c 2 cch tip cn x l
request trang web t my khch: Cch 1: Khi my khch yu cu mt trang v d
trang abc. th my ch s c ton b ni dung ca trang v gi v cho pha my
khch m khng thc hin bt k x l no. N V2.0 http://www.aptech.utehy.vn;
[email protected]; Tel: 03213-713.319P.33Ti liu kha hc lp trnh
web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tin hon ton khng qua tm n ngha bn trong ca trang
abc. Ni dung trang ny sau s c pha trnh duyt x l. Cch 2: Khi my khch
yu cu mt trang v d trang xyz. th my ch s c ton b ni dung ca trang v
x l ti Server (trc khi gi v cho client) c kt qu, tip theo ly kt qu
x l c gi v cho pha my khch. Kt qu tr v cho my khch c th cha cc phn
t HTML, cc cu lnh JavaScript, cc nh ngha kiu CSS.v tip tc c pha
client (trnh duyt) x l nh cch 1. Vi cch 1, do vic x l khng din ra
bn pha server nn trang web khng th c/ ghi cc d liu trn Server c (v
d Danh sch khch hng, danh mc sn phm,.). V vy n ch ph hp vi cc trang
web n gin, khng i hi x l chi tit. Vi cch 2, do vic x l thng tin ti
server nn hon ton c th c/ ghi d liu trn chnh server . V vy, n ph hp
vi cc d n ln v tnh bo mt cao. M hnh theo cch ny gi l m hnh lp trnh
pha my ch. Di y l hnh nh minh ha cho 2 m hnh ny: M hnh lp trnh pha
my khch (Client side)V2.0 http://www.aptech.utehy.vn;
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web vi ASP.NET Bin son: Trung tm Hng Yn Aptech http://08tn1d.net
din n Sinh Vin Ton Tin M hnh lp trnh pha my chCu hi: Khi no th mt
trang s c x l bn Server trc ?. hay ni cch khc l khi no th c gi l x
l theo m hnh pha server? Tr li: Cc trang (file) c ui m rng m server
c th x l, v d: asp, php, jsp, aspx Cu hi: C th ly mt v d v mt trang
s c x l pha server v trang s khng c x l pha server ? Trang
Trang1.htm Hello world Trang2.aspx Untitled Page 2 dng ny s c x l
bn pha server trc Cu hi: Chng trnh Client v server c nht thit phi
nm trn hai my tnh ring bit khng ? v Client l cc trnh duyt ri (IE,
FireFox), cn server l chng trnh no ? V2.0
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li: Hai chng trnh ny hon ton c th nm trn cng mt my tnh. Chng trnh
server thc cht l mt chng trnh c tn l IIS (Internet Information
Service). Cu hi: Phi vit nh th no server hiu l cn phi x l bn pha
server trc khi gi v cho pha Client ? Tr li: Trc tin phi t phn m rng
cho file (v d .aspx), sau trong trnh duyt cn phi t nhng ni dung mun
x l bn pha server trong cp th c bit, v d:Hoc: *** Chnh cc k hiu v
Runat = Server mch bo Server rng : Hy x l ni dung bn pha server i!.
Nu khng c nhng k hiu ny th mc nhin server lm mi vic l gi tr li cho
trnh duyt x l. Cu hi: Sao khng gi ngay cho trnh duyt x l nh trc y m
c phi server x l !. Client x l s gim ti cho server, iu ny chng tt
hn sao ? Tr li: V trnh duyt ch c th hiu v x l c cc th HTML v
Javascript thi, cn n khng th x l c cc ni dung phc tp. V d n khng
hiu asp:Calendar l g ?2 C ch x l file ASP.NET pha my ch.i vi cc
trang ASP.NET, th c ch x l ging nh m t trn, tc l theo m hnh x l bn
pha server. Nhng c b sung thm tnh nng Compile and Cache:V2.0
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03213-713.319P.36Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton TinGii
thch c ch x l trn: - Bc 0: Ngi lp trnh phi to cc trang ASPX (gi s
tn trang l abc.aspx) v t n vo trong th mc web ca web server (c tn l
www.server.com). Trn thanh a ch ca trnh duyt, ngi dng nhp trang
www.server.com/abc.aspx. - Bc 2: Trnh duyt gi yu cu ti server vi ni
dung: Lm n gi cho ti trang abc.aspx th tt !. - Bc 3: web server s
bin dch code ca trang aspx (bao gm c cc m code vb.net/ c# - gi l
code behind hay code file) thnh class. - Bc 4: Lp sau khi c bin dch
s c server thc thi. - Bc 5: Server tr kt qu thc thi v cho trnh duyt
(trang HTML). Ring vi ASP.NET th vic bin dch s c thc hin thng minh
hn, nh sau:V2.0 http://www.aptech.utehy.vn; [email protected];
Tel: 03213-713.319P.37Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton TinV2.0
http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319P.38Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin3 Mt
s v d minh ha.3.1 Yu cu x l ti pha server thng qua Runat=ServerV2.0
http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319P.39Ti liu kha hc lp trnh web vi ASP.NET Bin son:
Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin 3.2
Yu cu x l bn pha server thng qua cp th Ngoi 2 cch trn, cn 2 cch yu
cu x l trang web trc tip trn server, l: t cc cu lnh ngay trong cp
th Script, nhng c thuc tnh Runat = Server:.. . /// /// Cc cu lnh/
khai bo bin/ khai bo hm/ nh ngha lp v.v... /// cn x l bn pha server
th t vo y ! V d: /// string HoVaTen = "Aptech Center"; public int
Tong (int a, int b) { return a + b; } // Hoc nh ngha lp public
class Example { public int Tich (int a, int b) { return a * b; } }
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3.3 Yu cu x l bn server thng qua ScriptV2.0
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Trung tm Hng Yn Aptech http://08tn1d.net din n Sinh Vin Ton Tin 3.4
Yu cu x l bn pha server bng cch t trong file Code4 Webform trong
ASP.NET xy dng ng dng web, ASP.NET cung cp sn cho cc nh lp trnh rt
nhiu lp ngay khi ci t .NET framework. Trong s ny c mt lp c bit quan
trng l Page. Mi lp Page s trnh by mt trang ti liu tng ng vi mt
window v c gi l mt web form. Web form l mt cng ngh cho php xy dng
cc trang web trong c th lp trnh c. Cc trang ny gi l ASP.NET web
form pages hay ngn gn l web form. Cc trang web xy dng bng ASP.NET s
khng ph thuc vo trnh duyt (tc l trnh duyt no cng cho kt qu nh nhau
v hin th ging nhau). Mt s u im ca web forms: Web forms c th c thit
k v lp trnh thng qua cc cng c pht trin ngdng nhanh (RAD). Web form
h tr mt tp cc iu khin (controls) c th m rng. Bt k mt ngn ng .NET no
cng c th c dng lp trnh vi web forms. Asp s dng trnh thc thi ngn ng
chung (CLR) ca .NET framework do thahng mi u th ca .NET Framework.
V d : Kh nng tha k.5 Tm hiu cu trc trang ASP.NETMt trang ASP.NET
bao gm c phn giao din ngi dng v phn x l logic bn trong. Giao din
ngi dng chu trch nhim hin th cc thng tin v tip nhn d liu t ngi dng,
trong khi phn x l (lp trnh) m nhim vic iu khin s tng tc ca ngi dng
vi trang web. Phn giao din ngi dng bao gm mt file cha ngn ng nh du
V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
03213-713.319 P.42Ti liu kha hc lp trnh web vi ASP.NET Bin son:
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HTML hoc XML v server controls chng hn. File ny c gi l mt Trang
(Page) v c ui m rng l aspx. Phn p ng cc tng tc ca ngi dng vi trang
web c thc hin bi mt ngn ng lp trnh chng hn nh Visual Basic.NET v
C#. Chng ta c th thc hin vic vit code bng bt k ngn ng lp trnh no c
h tr bi CLR ngay trong trang ASPX hoc tch ra mt file ring. File tch
ring ny c gi l file Code Behind hay mi y gi l Code file. ui m rng
ca Code file l .VB (Nu dng ngn ng Visual Basic) hoc .CS (nu dng ngn
ng C#).Cch lu tr ny c minh ha qua mt ng dng c th di y. Trong ,
trang web th nht Default2.aspx cha c code (C#) v giao din (HTML) cn
trang web th hai t code v giao din ra 2 file ring bit. default.aspx
v default.cs. *** Ch : C th kt hp va t code trong file aspx va t
code trong file cs.Trang Default2.aspx cha code bn trong n.Code c t
trong default.cs Cn phn giao din cha trong default.aspxV2.0
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webform bao gm 2 thnh phn: Thnh phn giao din (trang thisfile.aspx)
Thnh phn x l (lp trnh) thisfile.csV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin Phn tch mt trang ASP.NET thc t (Trang ny lu
code v giao din trn 2 file):File Default.aspx Server side - example
3 Ni dung file code (default.cs) nh sau: File Default.csusing
System; using System.Web; using System.Web.UI; using
System.Web.UI.WebControls; public partial class Lession03_default :
System.Web.UI.Page { protected void Tong (object sender, EventArgs
e) { txtKetQua.Text = (int.Parse (txtA.Text) + int.Parse
(txtB.Text)).ToString (); } }Trong file default.aspx:- Page
Language="C#" : ch ra rng ngn ng c s dng lp trnh lC#-
CodeFile="~/Lession 03/Default.aspx.cs": Cho bit ni dung file
chacode x l l file ~/Lession 03/Default.aspx.cs. - Inherits
="Lession03_default": Cho bit l trang giao din tha k t lp no trong
file ~/Lession 03/Default.aspx.cs (Bi v mt file c th c cha nhiu
lp).- Server side - example 3 V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton TinCho bit l th ny cn c x l bn pha server. Tuy
nhin ni dung trong th ny khng c g c bit x l v kt qu sau x l s l
(khng c runat=server): Server side - example 3 : Cho bit l ni dung
trong cp th form cn c x l bn pha server. : l th to ra phn t
textbox, tuy nhin do c thuc tnh runat = server nn vic to ny s c thc
hin bn server, c kt qu tr v (l - public int Hieu (int a, int b) {
return a - b; } on script ny c thuc tnh runat=Server, v vy n s c x
l pha server. Thuc tnh language = C# cho bit ngn ng s dng vit l C
Sharp.Trong file default.csNi dung file ny hon ton cha cc cu lnh ca
ngn ng lp trnh VB.NET hoc C#. Vic vit code cho file hon ton ging nh
vit cc chng trnh trn window form hay chng trnh Console. Ch : Trong
file ny khng c cha trc tip cc th HTML. Cc cu lnh trong file ny HON
TON C PHP TRUY CP TI CC PHN T trong file default.aspx c thuc tnh
runat = server. Cu hi: Nu trong file default.cs c dng lnh
sau:cmdTinhTong.Text = Tnh tng; th chng trnh c bo li khng ? V sao
?6. Code behind v vit code pha Server.Cc file cha m code (VB.NET
hoc C#) c gi l Code file (cch gi mi) hay Code behind (cch gi c). M
lnh ti y thng x l cc tc v lin quan n nghip v, trong cng c cc cu lnh
cho php gi kt qu v cho pha trnh duyt. C th l phng thc write ca i
tng Response. V d mun tr mt xu S v cho trnh duyt hin th, ta vit:
Response.write(S). Vic s dng phng thc write ny nh th no sinh ra cc
phn t cho trnh duyt hiu l mt k nng quan trng. Nhn chung, ngi ta
thng chia cc web form thnh 2 phn l trang cha giao din (aspx) v
trang cha m code (.vb; .cs) m bo tnh chuyn mn ha v d bo tr hn.V2.0
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HTML Server Controls v Web controls7.1 Gii thiu gip cho vic pht
trin cc ng dng web nhanh chng v thun tin, ASP.NET cung cp cho chng
ta mt tp hp cc iu khin sn c thc hin hu ht cc cng vic ph bin hng
ngy. Cc iu khin ny chia lm 2 loi: HTML Server Control v ASP.NET
server control. Cc iu khin (phn t) ny u c x l bn pha server (c thuc
tnh runat=server) v vy chng ta u c th truy cp n cc phn t ny bng cc
cu lnh C# (cc cu lnh nm bn trong Code file). im khc bit gia HTML
Server control v ASP.NET server control ch: iu khin HTML Server
control th c s lng v cch thc to ging ht cc phn t HTML m ta vn to
trong trang HTML, ch khc mt iu l c thm runat = server; iu khin
ASP.NET control th c nhiu thuc tnh hn, thc hin c chc nng phc tp hn
HTMLServer controls.-7.2 Cch thc to phn t HTML Server Control v
ASP.NET control a) HTML Server control (Gii thiu bit, khng nn dng)
C php to phn t HTML Server control:o o Trong : Tn loi th l input,
select, p, h1, . V d: b) ASP.NET server control (Nn dng) C php to
phn t ASP.NET server control o o V d: o o oTrong asp: l bt buc,
Loi_PT c th l button, textbox, calendar, select, treeview,
adRotator, listview, gridview, image,. runat="server" cell V2.0
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**** Ch **** c th truy xut ti cc phn t ny trong Code file (hay
server script pha server)th mi phn t cn phi t cho n mt id duy nht.
Trong tt c cc ng dung, nu c th c th nn dng cc ASP.NET server
control m bo tnh tng thch vi trnh duyt. Cc iu khin ASP.NET server
control hon ton c th do ngi dng to ra. (phnny s c cp trong phn Lp
trnh ASP.NET nng cao)II. Thc hnh1. Yu cuXy dng li trang web v nhp
thng tin nh cung cp bi trc HON TON bng cc ASP Server Control. Cc hm
kim tra cng c vit bng m lnh pha Server (Vit bng C#.NET).Giao din
trang webV2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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Hng dnMi th gi y c thm tin t asp:, v d: v thuc tnh runat="server".
Vit cc lnh x l ng vi cc s kin trong ca s code ca VS.NET. gi mt hm/
phng thc khi mt s kin xy ra, ta thc hin theo cch: + Vit mt hm trong
ca s code dng: Tn_Hm(object sender, EventArgs e) + Gn tn hm ny cho
tn s kin ca phn t. V d: Gi hm "Thc_Hin" khi ngi dng click chut ln
nt "Thm" nh sau: Trong ca s code: Protected void Thc_Hin(Object
sender, EventArgs e) {... } Trong ca s son code html: .3. Minh ho
muV y c c phn x l pha server, do vy s c thm trang m code. trang
Default.aspx Chng trnh qun l bn hng - Nhp thng tin nh cung cp NHP
THNG TIN NH CUNG CP Tn Nh CC Ngi i din V2.0
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v in thoi a ch NCC Thnh ph: nh logo: M bu in: Quc gia: V2.0
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thoi: S Fax: a ch website
Danh sch nh cung cp hin c M NCC Tn NCC a ch Homepage 1V2.0
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ty FPT Lng H - Ba nh www.fpt.vn Trang Default.aspx.csusing System;
using System.Web; using System.Web.UI; using
System.Web.UI.WebControls; public partial class _Default :
System.Web.UI.Page { protected void Page_Load(object sender,
EventArgs e) { KhoiTaoTrangThai (); } //Hm t li trng thi mt s phn t
v trng thi thng. private void KhoiTaoTrangThai () {
lblThongBao.Text = ""; txtNCC.BackColor =
System.Drawing.Color.White; lstCity.BackColor =
System.Drawing.Color.White; txtHomePage.Style.Value =
"background-color:white"; } // Hm kim tra xem d liu nhp hp l hay
cha. True nu hp l. protected Boolean KiemTraDulieu () { if
(txtNCC.Text == "") { lblThongBao.Text = "Bn cha nhp tn nh cung cp
!"; txtNCC.BackColor = System.Drawing.Color.Yellow; txtNCC.Focus
(); return false; } if (lstCity.SelectedIndex aptech
Request("txtPassword") => 123456 1.2 Cc thnh phn (thuc tnh v
phng thc) chnh Phng thc: Request.QueryString.Get("Tn_Phn t cn c"):
c gi tr ca mt phn tc gi theo phng thc Get (Method = "Get") Phng thc
Request.Form.Get("Tn_Phn t cn c"): c gi tr ca mtphn t c gi theo
phng thc Post (Method = "Post"). Ch : C th dng
Request.Form.GetValues v Request.Form.GetValues c. V2.0
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V d s dng Xy dng 2 trang web : trang Default.aspx, trong c 2
textbox cha tn v mt khu. Khi ngi dng click vo nt submit th gi tn v
mt khu sang trang Webform1.aspx hin th.Trang ngun (gi):
Default.aspxKt qu nhn v. Code ca 2 trang s nh sau:V2.0
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TinDefault.aspxWebform1.aspxV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton TinCode x l ca trang webform1.aspx.cs2 Response
Object1.1 i tng Response dng lm g ? i tng ny c dng gi ni dung (mt
xu) bt k v cho trnh duyt. 1.2 Cc thnh phn (thuc tnh v phng thc)
chnh Phng thc: Response.write() dng gi gi tr biu thc truyn vocho
pha trnh duyt. Phng thc: Flush dng a d liu cn trong b m pha server
v cho phatrnh duyt. Phng thc Response.Redirect(a ch URL): Chuyn ti
mt trang khc.1.3 V d s dng To mt trang Login hon ton bng phng thc
Response.write nh sau:V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton TinV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin Trang code s nh sau:3 Server Object3.1 i tng
Server dng lm g ? Dng to cc i tng COM Ly thng tin v tn my nh x ng
dn o thnh ng dn vt l.3.2 Cc thnh phn (thuc tnh v phng thc) chnh
CreateObject(COM Specification) t dng trong ng dng .NET
MachineName: String; Tr v tn ca my tnh server ang chy.
Mappath(Virtual path): Tr v ng dn vt l ca ng dn o tng ng.3.3 V d s
dng In ra tn ca my ch hin hnh: Response.Write(Server.MachineName);
Cho bit ng dn thc s trn cng (th mc vt l) ca trang hin hnh
(trangdefault.aspx) : Server.Mappath(default.aspx); Cho bit ng dn
vt l ng vi tp QLCB.Mdb, bit rng tp ny nm trong mtth mc con l
App_Data: Server.Mappath(App_Data/QLDB.MDB);V2.0
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Session Object4.1. Bin Sesstion Khi vo mt website, ngi dng c th
duyt rt nhiu trang web ca website . Nu mun lu tr thng tin v khch
thm ny trong c phin lm vic th c th lu vo cc bin, gi l bin Session.
Ni cch khc, bin session l mt bin m mi trang trong mt phin (Session)
u c th truy xut. 4.2. i tng Session L i tng dng qun l (to, c, ghi)
cc bin sesstion v mt s thng s khc. + C php to bin Session nh
sau:Session.Add("Tn_Bin","Gi tr khi to");Lu : Tn bin phi t trong cp
du nhy kp. c th l xu k t hoc s... V d : To mt bin tn l MaNguoiDung
v gn gi tr l TK34 Session.Add(MaNguoiDung,TK34); + C php c gi tr ca
mt bin sesstion nh sau: Session.Contents[Tn_Bin] hoc dng ch s:
Session.Contents[i]; + C php ghi (thay i) gi tr ca bin session:
Session.Contents[Tn_Bin] = V d: Response.write(M ngi dng l :
&Session.Contents[MaNguoiDung]) Ring vi i tng Session, n cn c
cc s kin. Cc s kin ny t ng c gi mi khi mt phin lm vic c to ra. Cc s
kin ny c tn l On_Start v On_End. Cc s kin ny c t trong file
Global.asax.5 Application Object5.1 i tng Application dng lm g ?
Dng qun l cc bin c phm vi ton ng dng. C tc dng n mi ngi dng. 5.2.
Khi nim bin ton ng dng Bin ton ng dng l bin c tc dng i vi mi ngi
dng truy cp vo website. Mi trang aspx.cs u c th truy cp n bin ny v
d bt k thi im no. 5.3. i tng Application Dng qun l (To, c, ghi) cc
bin c phm vi ton ng dng. + C php to bin Application:
Application.Add(Tn_Bin, ); + V d: To bin So_Nguoi_Truy_Cap
Application.Add(So_Nguoi_Truy_Cap, 0) V2.0
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Application: Application.Contents[Tn_Bin] hoc ch s:
Application.Contents[i] + V d : c v ghi bin Application.
Application.Contents[So_Nguoi_Truy_Cap] =
Application.Contents[So_Nguoi_Truy_Cap] + 1 Response.write(Bn l v
khch th: & Application.Contents[So_Nguoi_Truy_Cap]) Ngoi ra, i
tng Application cn c 2 phng thc thng dng l Application.Lock(): kha
khng cho ngi khc sa i cc bin ton cc v Application.UnLock() m kha .
i tng Application cng c 2 s kin l Application_OnStart v
Application_OnEND. S kin OnStart ch c kch hot duy nht mt ln khi yu
cu u tin pht sinh. S kin OnEND c kch hot khi dch v web dng
(unload). i tng Application c 2 phng thc l Lock v Unlock. Khi gi
phng thc Lock (kha) th tt c cc ng dng khng c php thay i cc gi tr
Application. cc ng dng khc c php thay i cc bin Application th gi
phng thc Unlock. M lnh vit cho 2 s kin ny cng c t trong file
Global.asa.II. Thc hnh1. Bi 1: To mt trang LoginNu ngi dng nhp user
name v mt khu tng ng l asp.net v 123456 th c php truy cp cc trang
Index.aspx, tri li mi ln ngi dng truy cp n trang Index.aspx th u c
chuyn ti trang Login.aspx. Minh ha: Cn to 3 trang l Home.aspx/cs,
Login.aspx/cs v Global.asax nh sau:V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin Thanh ton - Trang cn phi Login trc khi xem y
l ni dung rt quan trng, bn ch c th thy dng ny sau khi Login ! Ni
dung trang Home.aspxV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tinusing System; using System.Web; public
partial class Home : System.Web.UI.Page { protected void
Page_Load(object sender, EventArgs e) { if (Session.Contents
["TrangThai"].ToString () == "chuadangnhap") { Response.Redirect
("Login.aspx"); } } }Trang Home.aspx.cs void
Application_Start(object sender, EventArgs e) { // Code that runs
on application startup } void Application_End(object sender,
EventArgs e) { // Code that runs on application shutdown } void
Application_Error(object sender, EventArgs e) { // Code that runs
when an unhandled error occurs } void Session_Start(object sender,
EventArgs e) { // Code that runs when a new session is started
Session.Add ("TrangThai", "chuadangnhap"); } void
Session_End(object sender, EventArgs e) { } Trang Global.asaxV2.0
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System Login User name (asp.net): Password (123456): Trang
Login.aspxusing System; public partial class Login :
System.Web.UI.Page { protected void cmdLogin_Click (object sender,
EventArgs e) { if (txtUserID.Text == "asp.net" &&
txtPassword.Text == "123456") { Session.Contents ["TrangThai"] =
"DaDangNhap"; Response.Redirect ("Home.aspx"); } } }V2.0
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Trang Login.aspx.csV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin2. Bi 2: To mt trang m s lng ngi truy cp.Dng
bin tp text lu. Hng dn: To 2 trang l Index.aspx/cs v Global.asax vi
ni dung sau: Trang Index.aspx Home Page - Hit counter Cho mng bn n
website ca chng ti Trang Index.aspx.csusing System; public partial
class Index : System.Web.UI.Page { protected void Page_Load(object
sender, EventArgs e) { lblSLKhach.Text="Bn l v khch th: " +
Application.Contents["SLTruyCap"].ToString(); } }Trang Global.asax
void Application_Start(object sender, EventArgs e) {
Application.Lock (); System.IO.StreamReader sr; sr = new
System.IO.StreamReader (Server.MapPath ("SL.txt")); string S =
sr.ReadLine (); sr.Close (); Application.UnLock (); //To mt bin
Applciation l SLTruyCap v khi to gi tr S Application.Add
("SLTruyCap", S);V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin} void Application_End(object sender,
EventArgs e) { // Code that runs on application shutdown } void
Application_Error(object sender, EventArgs e) { // Code that runs
when an unhandled error occurs } void Session_Start(object sender,
EventArgs e) { //Tng s lng ngi truy cp ln 1 khi c mt ngi mi thm
Application.Contents ["SLTruyCap"] = int.Parse
(Application.Contents ["SLTruyCap"].ToString ()) + 1; //Lu vo file
SL.txt (m v ghi ) System.IO.StreamWriter sw; sw = new
System.IO.StreamWriter (Server.MapPath ("SL.txt")); sw.Write
(Application.Contents ["SLTruyCap"].ToString ()); sw.Close (); }
void Session_End(object sender, EventArgs e) { } Sau khi to, chy
file Index.aspx kim chng s thy rng s lng ngi truy cp lun lun tng ln
bt k l server c tt hay my tnh b trc trc. y l cch c dng chnh thc m s
lng lt ngi truy cp. Bn hon ton c th ci tin hin th s lng ngi truy cp
bng hnh nh cho sinh ng hn.V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton TinBI 7: CNG NGH ADO.NETMc tiu: Kt thc bi hc ny,
hc vin c th: To c c s d liu cho h thng qun l cn b S dng c cc lp
truy xut ca ADO.NET Hin th d liu trn trnh duyt bng cc iu khin ASP
Server controls. Hon thin chc nng Nhp h s cn b, trong c lu vo
Database. I. L thuyt1. Gii thiu chungKhi pht trin cc ng dng trn nn
web th cng vic ch yu phi gii quyt l x l cc nghip v, trong phn ln l
x l C s d liu. Trong mi trng pht trin Microsoft .NET tt c cc ng dng
webform hay winform u thng nht s dng chung mt b th vin truy xut v
thao tc C s d liu gi l ADO.NET (Active Data Object). - ADO.NET l mt
tp cc lp nm trong b th vin lp c s ca .NET Framework, cho php cc ng
dng windows (nh C#, VB.NET) hay ng dng web (nh ASP.NET) thao tc d
dng vi cc ngun d liu. - Mc tiu chnh ca ADO.NET l: Cung cp cc lp
thao tc CSDL trong c hai mi trng l phi kt ni (Disconected data) v
kt ni (Connected data). Tch hp cht ch vi XML (Extensible Markup
Language) Tng tc vi nhiu ngun d liu thng qua m t d liu chung. Ti u
truy cp ngun d liu (OLE DB & SQL server). Lm vic trn mi trng
Internet. - Cc lp ca ADO.NET c t trong Namespace l System.Data/
System.Data.oledb - ADO.NET bao gm 2 Provider (2 b th vin thng dng)
thao tc vi cc CSDL l: OLE DB Provider (nm trong System.Data.OLEDB)
dng truy xut n bt k CSDL no c h tr OLEDB; SQL Provider (nm trong
System.Data.SQLClient) chuyn dng truy xut n CSDL SQL Server (Khng
qua OLE DB nn nhanh hn). Hin nay, cc hng th ba cn cung cp cc
Provider khc nh : MySQL, Oracle provider cho php ng dng .NET truy
xut n cc c s d liu khng phi ca Microsoft khc. - V tr ca ADO.NET
trong kin trc ca .NET FrameworkV2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton TinV tr ca ADO.NET trong kin trc ca .net
Framework T kin trc ta thy rng: ADO.NET l mt thnh phn ni ti
(Instrict) ca .NET framework, do vy n c th c s dng trong tt c cc
ngn ng h tr .NET nh C#, VB.NET m khng c s khc bit no (Tc l cc chc
nng cng nh cch s dng hon ton ging nhau).2. Kin trc ca
ADO.NETADO.NET cho php lm vic c hai ch , ch Kt ni (Connected) v phi
kt ni (Disconnected). B ba Connection, Command v DataReader: cho
php lm vic ch Connected; cn DataAdapter, Connection, Command v
Dataset lm vic ch Disconnected. Trong ch Connected th mi khi thao
tc (nh sa, xa, thm) th u i hi ng dng phi kt ni v thao tc trc tip vi
c s d liu (CSDL); cn trong ch Disconnected th vn c th thm, sa, xa d
liu trn i tng cc b; khng nht thit phi kt ni ngay n CSDL (Xem m hnh
di).V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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RecordsetMdb; mdf, XML3. Cc lp thao tc vi CSDL: Connection,
Command,.3.1 Lp Connection + Chc nng: L i tng c nhim v thc hin kt
ni n C s d liu cc i tng nh Command thao tc vi CSDL thng qua
Connection ny. + Khai bo (c nhiu cch):public OleDbConnection Cn1;
public OleDbConnection Cn2 = new OleDbConnection (); public
OleDbConnection Cn3 = new OleDbConnection
("Provider=Microsoft.jet.....");Mt s phng thc: + Open: Dng m kt ni:
Cnn.Open(): M kt ni n CSDL do ta ch nh trong
ConnectionStringP.71V2.0 http://www.aptech.utehy.vn;
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Sinh Vin Ton Tin Lu : sau khi gi phng thc Open, c th xem kt ni
thanh cng hay khng thng qua thuc tnh State ca Connection: if
(Cnn.State == 1) Kt ni thnh cng ! + Close(): Dng ng kt ni:
Cnn.Close(); Thng th nn vit nh sau trnh li : if (Cnn.State == 1)
Cnn.Close(); + GetSchema: Ly thng tin v CSDL (V d tn cc bng, cc
trng trongbng)Mt s thuc tnh: + State: Cho bit trng thi kt ni.
(ConnectionState.Open kt ni cm) + ConnectionString: Cha cc thng tin
kt ni. V d v mt trang thc hin kt ni n CSDL C:\Nwind.mdbusing
System; using System.Data; using System.Data.OleDb; public partial
class Lession_12_Default : System.Web.UI.Page { /// /// Hm kt ni n
C s d liu /// /// ng dn ti file MDB /// Tr v i tng OledbConnection
hoc null public static OleDbConnection OpenDB (string DBName) { try
{ OleDbConnection Conn = new OleDbConnection
();Conn.ConnectionString="Provider=Microsoft.jet.oledb.4.0;data
source="+DBName;Conn.Open (); return Conn; } catch (Exception ex) {
return null; } } // Kt ni n c s d liu v thng bo kt qu kt ni trn mt
Label. protected void Page_Load (object sender, EventArgs e) {
OleDbConnection Conn; Conn = OpenDB (@"c: \Nwind.mdb"); V2.0
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(Conn != null) { if (Conn.State = = ConnectionState.Open)
lblThongBao.Text = " kt ni thnh cng ! " ; } else { lblThongBao.Text
= "Khng th kt ni c !"; } } } Ch : Thng thng tp c s d liu c lu trong
th mc App_Data. Khi c th kt ni n CSDL ny m khng cn bit th mc hin c
t trong C:\ hay D:\ th cn vit ng dn ca tp nh sau:Conn = OpenDB
(Server.MapPath("../App_Data/nwind.mdb"));V tr ca tp CSDL
nwind.mdbV2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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Nu a cha tp CSDL c nh dng l NTFS v c t quyn truy cp th cn phi m bo
rng th mc cha tp CSDL c quyn read/write cho ngi dng l IUSR_. (C th
thay i quyn hoc ngi dng truy cp n th mc bng cch Right click ln th
mc , chn Properties, tip theo chn th Security v Add thm ngi dng/
quyn..) 3.2 Lp Command Chc nng: Thc hin cc thao tc i vi CSDL, nh
Insert, Update, delete, Select.Tuy nhin, thc hin c cc lnh ny th cn
phi thng qua mt Connection no ang c m. Cch to (chnh tc):-
OleDbCommand Cmd;Cmd = new OleDbCommand (); Cmd.CommandText = "Cu
lnh SQL"; Cmd.Connection= OleDbConnection_Obj;Hoc vit gn hn:
OleDbCommand Cmd=new OleDbCommand("Lnh SQL",OleDbConnection_Obj);
Trong OleDbConnection_Obj l mt OleDbConnection m trc Open ri.Cu lnh
SQL: l mt xu cha cu lnh SQL bt k. Mt s phng thc dng thc thi cu lnh
SQL: int ExecuteNonQuery(): S dng khi CommandText trn thuc dng
Insert,Delete, Update. Hm ny tr v s bn ghi b tc ng
(affected).Object ExecuteScalar(): S dng khi CommandText trn l cu
lnh SQL ch tr v mt kt qu n, v d cu lnh m tng s bn ghi : Select
Count(*) Hm ny tr v hng v ct u tin ca kt qu thc thi truy vn. Cc hng
v ct khc b b qua. OleDbDataReader ExecuteReader(): Dng khi
CommandText l mt cu lnh chn (Select). Hm tr v l mt i tng
OleDbDataReader cha kt qu thc thi cu lnh (thng l cu lnh Select).
XMLReader ExecuteXMLReader(): Dng c d liu l mt tp XML. Phng thc ny
ch p dng cho mt s Provider (v d SqlClient) Mt s thuc tnh
CommandText: Cha cu lnh SQL cn thc thi, v d: "Select * from
Employees","Insert into Employees (.) values (.)", "Delete from
Employees where " Connection: cho bit l i tng Command s dng kt ni
no. CommandType: Cho bit CommandText cha StoreProcedure, tn bng hay
l cu lnh SQL. Mc nh thuc tnh ny c gi tr l Text.V2.0
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d: Xy dng mt trang web hin th tng s bn ghi ca bng Products trong c
sd liu nwind.mdb.V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin Default.aspx.csusing System; using
System.Data; using System.Data.OleDb; public partial class
Lession_12_Default : System.Web.UI.Page { // Kt ni n c s d liu v
thng bo kt qu trn mt Label. protected void Page_Load (object
sender, EventArgs e) { // To i tng Connection v m kt ni n CSDL
OleDbConnection Conn; Conn=new OleDbConnection();
Conn.ConnectionString="Provider=Microsoft.jet.oledb.4.0; data
source=" ; Conn.ConnectionString +=
Server.MapPath("../App_Data/nwind.mdb"); Conn.Open(); // To i tng
Command v thc thi cu lnh m s bng ghi OleDbCommand Cmd; Cmd = new
OleDbCommand (); Cmd.CommandText = "Select Count(*) from Products";
Cmd.Connection = Conn; // Hin th kt qu trn Label int SL = (int)
Cmd.ExecuteScalar(); lblThongBao.Text = "S bn ghi trong bng
Products: " + SL.ToString (); // Gii phng kt ni. Cmd.Dispose ();
Conn.Close (); } }V d: Thm Tn nh cung cp vo bng Suppliers: Trang
giao din Insert data V2.0 http://www.aptech.utehy.vn;
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din n Sinh Vin Ton Tin Trang Code behind:using System; using
System.Data; using System.Data.OleDb; public partial class
Lession_12_Command_InsertData : System.Web.UI.Page { protected void
Page_Load(object sender, EventArgs e) { } protected void
cmdAdd_Click (object sender, EventArgs e) { // To i tng Connection
v m kt ni n CSDL OleDbConnection Conn; Conn = new OleDbConnection
(); Conn.ConnectionString = "Provider=Microsoft.jet.oledb.4.0; data
source="; Conn.ConnectionString += Server.MapPath
("../App_Data/nwind.mdb"); Conn.Open (); // To i tng Command v thc
thi cu lnh m s bng ghi OleDbCommand Cmd; Cmd = new OleDbCommand ();
Cmd.CommandText = "Insert into Suppliers(CompanyName) values('" +
txtNCC.Text + "')"; Cmd.Connection = Conn; Cmd.ExecuteNonQuery ();
Cmd.Dispose (); Conn.Close (); } }3.3 Lp DataReader Chc nng: Dng n
nhn kt qu tr v t phng thc ExecuteReader ca itng Command. N tng t nh
mt Recordset ca ADO, tuy nhin d liu nhn v l Readonly v ch c theo
chiu tin. Mt s phng thc: Bool Read(): Thc hin vic c mt bn ghi (mt
hng) trong kt qu, sau chuyn ti bn ghi tip theo. Hm ny tr v true nu
vn cn d liu, false nu c ht. DataTable: GetTableSchema() Tr v mt
dataTable m t thng tin v DataReader nh tn cc ct. String:
GetName(int i) Tr v tn ca ct i P.77V2.0 http://www.aptech.utehy.vn;
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Sinh Vin Ton TinGetInt(int i), GetString(int i),, GetXXX(int i) Tr
v gi tr ca ct i v chuyn v dng Int, String, Mt s thuc tnh: Boolean:
HasRows cho bit l DataReader c cha d liu hay khng ? int FieldCount
Cho bit s trng (Ct) ca DataReader. Bin DataReader v d Dr cho php c
d liu ca tng (ct/ trng) cahng hin hnh nh sau: Dr["Tn trng"/ hoc ch
s]. V d : Np Tn ca tt c sn phm trong bng Products v a vo mt
ListBox. Trang giao din: OleDbDataReader demo Danh mc sn phm Trang
Code Behindusing System; using System.Data; using
System.Data.OleDb; public partial class Lession_12_DataReader :
System.Web.UI.Page { protected void Page_Load(object sender,
EventArgs e) { // To i tng Connection v m kt ni n CSDL
OleDbConnection Conn; Conn = new OleDbConnection ();
Conn.ConnectionString = "Provider=Microsoft.jet.oledb.4.0; data
source="; Conn.ConnectionString += Server.MapPath
("../App_Data/nwind.mdb"); Conn.Open (); // To i tng Command v thc
thi cu lnh m s bng ghi OleDbCommand Cmd; Cmd.CommandText = "Select
ProductName from Products"; Cmd.Connection = Conn;V2.0
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TinOleDbDataReader Dr; /// Dr = Cmd.ExecuteReader ();khng c
new//Duyt v a vo lstDSSP while (Dr.Read() == true) {
lstDSSP.Items.Add (Dr ["ProductName"].ToString()); } Cmd.Dispose
(); Conn.Close (); } }Cu hi: Vit lstDSSP.Items.Add (Dr
[0].ToString()) c c khng ?. 3.7 Lp DataColumn Chc nng: L mt thnh
phn to nn DataTable. Khai bo:DataColumn Dc; Dc = new DataColumn
(Tn_Ct); Hoc, to ct v ch nh kiu d liu cho ct: DataColumn Dc; Dc =
new DataColumn ("Hello", System.Type.GetType(Tn_Kiu)); Trong Tn_Kiu
c th l String, Int32, . Mt s phng thc: Mt s thuc tnh: Caption: Tiu
ca ct ColumnName: Tn ca ct. V d :To mt ct c tn l H tn, kiu String,
Tui kiu Int:DataColumn Dc_HVT; Dc_HVT = new DataColumn ("HoVaTen",
System.Type.GetType ("String")); Dc_HVT.Caption = "H v tn";
DataColumn Dc_Tuoi; Dc_HVT = new DataColumn ("Tuoi",
System.Type.GetType ("Int32")); Dc_HVT.Caption = "Tui";V2.0
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Lp DataTable Chc nng: Qun l d liu dng bng 2 chiu (Cc hng v cc ct).
Khai bo:DataTable Dt ; Dt=new DataTable(); hoc Dt = new
DataTable("Tn_Bng"); Mt s phng thc: DataRow NewRow() : Tr v mt i
tng DataRow; Clear(): Xa tt c cc d liu trong DataTable Mt s thuc
tnh: Columns: L mt tp hp, qun l ton b cc ct (Thm, xa, sa)
caDataTable. Columns li c cc phng thc thm/xa ct.Rows: L mt tp hp,
qun l ton b cc hng trong DataTable. Rows cng c cc phng thc thm/xa
hng. Truy xut n [i,j] ca bng: Tn_Bng.Rows[i][j]. C th dng vng lp
kiu nhfor (i=0; i < Dt.Rows.Count; i++) for (j=0; j <
Dt.Columns.Count; j++) { Dt.Rows[i][j] } duyt ton b cc trong Table.
V d : To mt bng c 2 ct l H tn (Kiu String) v Tui (Kiu
Int32).DataColumn Dc_HVT; Dc_HVT = new DataColumn ("HoVaTen",
Type.GetType ("String")); Dc_HVT.Caption = "H v tn"; DataColumn
Dc_Tuoi; Dc_HVT = new DataColumn ("Tuoi", Type.GetType ("Int32"));
Dc_HVT.Caption = "Tui"; DataTable Dt ; Dt=new DataTable();
Dt.Columns.Add (Dc_HVT); // To ct h tn nh vo Column trn
Dt.Columns.Add(Dc_Tuoi); // To ct tui. Hoc c th thm ngn gn
hn:Dt.Columns.Add("HoVaTen",Type.GetType("String"));3.9 Lp DataRow
Chc nng: L mt i tng qun l mt hng ca mt DataTable. Khai bo: DataRow
Dr; Lu : V Dr ph thuc vo bng (DataTable) nn nDataRow Dr=new
DataRow() !!!ch c to ra bi mt DataTable c sn, khng th to DataRow
theo kiu:V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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Truy xut cc ct () trong mt DataRow nh sau: Dr[Ch s] hoc Dr[Tn_Ct].
Trong Dr: l mt bin kiu DataRow V d : To mt bng c hai ct H tn v Tui,
sau chn vo bng ny 2 bn ghi cgi tr tng ng l {"Nguyn Vn An", 30} v
{"Nguyn Vn Bnh", 20}... DataTable Dt ; Dt=new DataTable();
Dt.Columns.Add (Dc_HVT); Dt.Columns.Add(Dc_Tuoi); DataRow Dr; Dr =
Dt.NewRow (); // To mt hng trng Dr ["HoVaTen"] = "Nguyn Vn An"; Dr
["Tuoi"] = 30; Dt.Rows.Add (Dr); // Thm vo bng Dr = Dt.NewRow ();
// To mt hng trng Dr ["HoVaTen"] = "Nguyn Vn Bnh"; Dr ["Tuoi"] =
20; Dt.Rows.Add (Dr); // Thm vo bng ..3.10 Lp DataSet Chc nng: L mt
i tng cha cc DataTable. N l ni lu tr d liu tm thicho ng dng trong
qu trnh x l. Lp DataSet ny nm trong System.Data. 0 1 2DataSet
Object Khai bo: DataSet Ds; DataSet Ds = new DataSet(); Mt s phng
thc: Mt s thuc tnh: Tables: Cha tt c cc bng cha trong Dataset.V2.0
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P.81Ti liu kha hc lp trnh web vi ASP.NET Bin son: Trung tm Hng Yn
Aptech http://08tn1d.net din n Sinh Vin Ton TinTables[i] hoc
Tables[Tn_Bng] : Tham chiu n mt bng c th trong Dataset. V d : Xem v
d mc 13.3.113.11 Lp DataAdapter Chc nng: ng vai tr cu ni / Chuyn i
d liu gia Ngun d liu (DataSource)v cc i tng thao tc d liu (nh
DataSet chng hn). Mt s phng thc: Fill (DataSet, Tn_Cho_DataSet): in
d liu ly c vo DataSet. Update(DataSet/DataTable) : Cp nht d liu
trong DataSet,DataTable ngc tr v C s d liu. Mt s thuc tnh:
SelectCommand, UpdateCommand, DeleteCommand, InsertCommand: tr v
hoccho php thit lp cc cu lnh SQL Chn (Select), Cp nht (Update),
Delete, Insert vo C s d liu. V d:Hin th ton b bng Suppliers ra mn
hnhTrang giao din DataSet demo Danh sch nh cung cp Trang Codeusing
System; using System.Data; using System.Data.OleDb; public partial
class Lession_12_DataSet : System.Web.UI.Page { protected void
Page_Load(object sender, EventArgs e) { // To i tng Connection v m
kt ni n CSDL OleDbConnection Conn; Conn = new OleDbConnection ();
Conn.ConnectionString = "Provider=Microsoft.jet.oledb.4.0; dataV2.0
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Tinsource="; Conn.ConnectionString += Server.MapPath
("../App_Data/nwind.mdb"); Conn.Open (); // To i tng Command v
select ton b bng Suppliers OleDbCommand Cmd; Cmd = new OleDbCommand
(); Cmd.CommandText = "Select * from Suppliers"; Cmd.Connection =
Conn; OleDbDataAdapter Da; Da=new OleDbDataAdapter();
Da.SelectCommand=Cmd; DataSet DsNCC = new DataSet (); Da.Fill
(DsNCC, "DS_NCC"); // Hin th trn mt bng dgrNCC.DataSource =
DsNCC.Tables ["DS_NCC"]; dgrNCC.DataBind (); } }V2.0
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THC HNH1. To c s d liuTo c s d liu Access QLCB.MDB c nhng bng vi cu
trc nh sau: Bng tblCanBo Bng Bng cp: tblBangCap Bng phng ban:
tblPhongBan Bng trnh chuyn mn: tblChuyenMon Bng chc v:
tblChucVuV2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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ngi dng Mi quan h gia cc bng (Ch chn Cascading Update/ Delete khi
to)2. Nhp d liu cho bng. y ch hng dn cch nhp mu cho bng tblUser, v
bng ny cha c d liu dng Xu, s, bool, datetime. Hc vin to cc bng khc
mt cch tng t. 2.1 Thit k trang giao din (Ch : Cc trang cn phi c gn
vo trong h thng giao din c xy dng bi trc, v d: a vo MasterPage)
Trang giao din NhapNguoiDung.aspx Nhp thng tin ngi dng .CanPhai
{text-align:right; font-style:italic} V2.0
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thng tin ngi dng Tn ng nhp Mt khu Quyn hn 1 2 3 4 5 Ghi ch V2.0
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Vit code behind. NhapNguoiDung.aspx.csusing System; using
System.Data; using System.Data.OleDb; public partial class
Lession_13_NhapNguoiDung : System.Web.UI.Page { protected void
Page_Load(object sender, EventArgs e) { } protected void
cmdThem_Click (object sender, EventArgs e) { // To i tng Connection
v m kt ni n CSDL OleDbConnection Conn; Conn = new OleDbConnection
(); Conn.ConnectionString = "Provider=Microsoft.jet.oledb.4.0; data
source="; Conn.ConnectionString += Server.MapPath
("../App_Data/QLCB.mdb"); Conn.Open (); string strSQL; string
TenDN=txtUserName.Text; string MatKhau=txtPassword.Text; string
GhiChu=txtGhiChu.Text; string NgayTao=DateTime.Now.Month.ToString()
+"/" + DateTime.Now.Day.ToString(); NgayTao += "/" +
DateTime.Now.Year.ToString(); int
QuyenHan=int.Parse(ddlQuyenHan.Text); strSQL="Insert into
tbluser(TenDangNhap, MatKhau, QuyenHan, NgayTao, GhiChu) "; strSQL
+= " values ('" + TenDN + "','" + MatKhau + "'," + QuyenHan + ",'"
+ NgayTao + "','" + GhiChu +"')"; // To i tng Command v select ton
b bng Suppliers OleDbCommand Cmd; Cmd = new OleDbCommand ();
Cmd.CommandText = strSQL; Cmd.Connection = Conn;
Cmd.ExecuteNonQuery (); txtUserName.Text = ""; txtPassword.Text =
""; txtGhiChu.Text = ""; ddlQuyenHan.Text = "1"; txtUserName.Focus
();V2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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}3. Hin th d liu trong bng ln trnh duyt3.1 Trang giao din
HienThiNguoiDung.aspx Danh sch ngi dng Danh sch ngi dng 3.2 Trang
code behind Trang HienThiNguoiDung.aspx.csusing System; using
System.Data; using System.Data.OleDb; public partial class
Lession_13_HienThi : System.Web.UI.Page { protected void
Page_Load(object sender, EventArgs e) { // To i tng Connection v m
kt ni n CSDL OleDbConnection Conn; Conn = new OleDbConnection ();
Conn.ConnectionString = "Provider=Microsoft.jet.oledb.4.0; data
source="; Conn.ConnectionString += Server.MapPath
("../App_Data/QLCB.mdb"); Conn.Open (); // To i tng Command v
select ton b bng Suppliers OleDbCommand Cmd; Cmd = new OleDbCommand
(); Cmd.CommandText = "Select * from tblUser"; Cmd.Connection =
Conn; OleDbDataAdapter Da; Da = new OleDbDataAdapter ();
Da.SelectCommand = Cmd; DataSet DsNCC = new DataSet (); Da.Fill
(DsNCC, "DS_USer"); // Hin th trn mt bngV2.0
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TindgrDSNS.DataSource = DsNCC.Tables ["DS_USer"]; dgrDSNS.DataBind
(); } }4. Cp nht d liu bng DataSet v DataAdapter cp nht d liu vo
trong CSDL, ta c th dng cu lnh SQL dng nh "UPDATE WHERE ." v thc
thi bng phng thc ExecuteNonQuery ca i tng Command. Tuy nhin cn c mt
cch khc cp nht na, l dng phng thc Update ca i tng DataSet v
DataAdapter. M hnh dng nh sau:Cc bc cn phi thc hin khi Update bng
DataAdapter: 1. To kt ni n CSDL 2. To i tng Command v t cu lnh
Select cho thuc tnh CommandText. Vic t cu lnh Select y l v sau
DataAdapter bit c cc trng ca bng gm nhng trng no ? 3. in (Fill) d
liu vo mt DataSet. 4. Chnh sa d liu trong cc bng ca DataSet 5. To
mt th hin ca CommandBuilder (OleDBCommandBuilder/
SqlCommandBuilder) 6. Gi phng thc Update ca DataAdapter cp nht thc
s vo Database. V d: Sa i trng thi ng nhp (Trng TrangThai) ca tt c
ngi dng trong bng tblUser thuc c s d liu QLCB.mdb thnh 1. Trang
giao dinUpdatewithDataAdapter.aspx Cp nht d liu thng qua Data
AdapterV2.0 http://www.aptech.utehy.vn; [email protected]; Tel:
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trng thi ng nhp thnh 1 Trang code behind:
UpdatewithDataAdapter.aspx.cs using System; using System.Data;
using System.Data.OleDb; public partial class
Lession_13_UpdatewithDataAdapter : System.Web.UI.Page { protected
void cmdEnableAllUser_Click (object sender, EventArgs e) { // To i
tng Connection v m kt ni n CSDL OleDbConnection Conn; Conn = new
OleDbConnection (); Conn.ConnectionString =
"Provider=Microsoft.jet.oledb.4.0; data source=";
Conn.ConnectionString += Server.MapPath ("../App_Data/QLCB.mdb");
Conn.Open (); // To i tng Command v select ton b bng tblUser
OleDbCommand Cmd; Cmd = new OleDbCommand (); Cmd.CommandText =
"Select * from tbluser"; Cmd.Connection = Conn; OleDbDataAdapter
Da; Da = new OleDbDataAdapter (); Da.SelectCommand = Cmd; // in d
liu vo DataSet DataSet Ds=new DataSet(); Da.Fill(Ds,"DSND"); // Sa
d liu ca bng tblUser trong Dataset for (int i=0; i <
Ds.Tables["DSND"].Rows.Count; i++) { Ds.Tables["DSND"].Rows
[i]["TrangThai"] = 1; } //Cp nht tr li C s d liu
OleDbCommandBuilder CmdBuild