vb data&programming

8/2/2019 VB Data&Programming

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البينت فى البسيك المرئى



نت ي ب ل ا ع ا و ن أ د د ل ا هFor example, we need to handle data such as

names, addresses, money, date, integers, floats,

statistics and etc

Data types

Numeric Text

Floating points Integers Mony

SinglePrecision

DoublePrecision

Shortintegers

LongIntegers

VariableLengthstrings

FixedLengthstrings

Integers



اع و ن أ وع ن ل ة م ي ق ل ا د زى خ ل ا ز ي ح ل ا الدة لبينت ا



اوث ل زي ممل ا الت Laterals

بت ا ث ل ة ي ا ه ن ى ف ز م ر ة ف ا ضإ ي ة ب ا ة ق أ د خ س د ع ى. و م ل ذ ت ب ا ث ل ذ و ب ى ئ ل ك س ا ل خ ى ل

Suffix Data type

% Integer

& Long

! Single

# Double

@ Currency

Xvalue=344% : Yvalue=0.00567# : Zvalue=19999@

memberName="Turban, John."TelNumber="1800-900-888-777"

ب ضو ح ة ف و صم بت و ص عمى



Variablesالمغيرات

ا ه ف ز خ ذ ل ى ف ا خ م ع ر ا ع .د ي ج م ا ن ل ذ ء ا أ ى ف غ ا ن ا ب

ي أ د ب س ذ م س ب غ ل : الة ل لشط

It must be less than 255 charactersNo spacing is allowedIt must not begin with a number

Period is not permittedReserved words like rem, val, .. is not allowed

VB is not a case sensitive language



ا د خ س ا ب ر ي غ وع ى ئ ر م ل ا ك ي س ب ل ا ب إ د ر. ك ل ذ ج ن ر ب ل ا ى ف Dim: ى م

Dim password As String

Dim yourName As String

Dim firstnum As Integer

Dim secondnum As Integer

Dim total As Integer

Dim doDate As Date

فى غ ل و ن ع ع ي

لى ء ز ل فى ة مل ة ا General



ات ري غ مل ا ل ا : ة ل ا ل ة ل ا ل ا غ م أ ى ف ة ق ض أ صخ ي

Variable=ExpressionThe expression could be a mathematical expression, a number,

a string, a boolean value(true or false) and etc. The following

are some examples:

firstNumber=100secondNumber=firstNumber-99

userName="John Lyan"

userpass.Text = password

Label1.Visible = True

Command1.Visible = false

Label4.Caption = textbox1.Text

ThirdNumber = Val(usernum1.Text)

total = firstNumber + secondNumber+ThirdNumber



ئى ر م ل ا ك ي سب ل ا ى ف يت م ل ا ء ا ر إ Operations in VB

+ Addition Value=x+y

- Subtraction Value=x-yfirstName=Text1.Text

secondName=Text2.Text

yourName=firstName+secondName

number1=val(Text3.Text)

number2=val(Text4.Text)

number3=num1*(num2^3)

number4=number3 Mod 2

number5=number4\number1

Total=number1+number2+number3+number4+number5

Average=Total/5

أثة



الميت Operation Precedenceألوة

() Parentheses

^ Exponentiation

*, / Multiplication and Division

\ Integer Division

Mod Modulo arithmetic

+, - Addition and Subtraction

=,>,<,<>,>=,<= Relational Operations

NOT Logical Negation

AND AND Operation

OR OR Operation

XOR XOR Operation

ى ر ي ب أ ى ف يم ي ل مشل ا يت م ل ا

الموضحة لوت

Print ((24-(3*5)/2-0.5)^2 16



يقت Commentsإضفة

ار-1 ادخس Rem

Print “This following is a remark statement”

Rem This print instruction will print what is between the two quotation marks

ة م د rem. ق ي ر ب ر ط ل ا ة ن ى

اة-2 اليص ة اد خس

X=(15-2*4)/2 ‘ The result will be 3.5

ى ة ا يص ل ا ة مة د . ق ي بر لطر ا ة ن



Function Value Returned

Abs Absolute value of a number Asc ASCII or ANSI code of a character Chr Character corresponding to a given ASCII or ANSI codeCos Cosine of an angleDate Current date as a text stringFormat Date or number converted to a text string

Left Selected left side of a text stringLen Number of characters in a text stringMid Selected portion of a text stringNow Current time and dateRight Selected right end of a text stringRnd Random number Sin Sine of an angleSqr Square root of a number Str Number converted to a text stringTime Current time as a text stringTimer Number of seconds elapsed since midnightVal Numeric value of a given text string

وح VB ر يى س ى ل ا ا د خ سا ر ي ث ل ا ا د ل ا د د ل ا ى قت ي ب ط ل ا ب



قت( ) ح ل ا ر ش ل ا ر ا أ ج ن ر ب ل ا ر ي س ى ف ح ل ا

Condition and loop statements

… Ifار-1 ThenIf conditions Then

VB expressions

End If

حى أ ى ح ى ل إ ؤ ي ى أ

If Balance - Check < 0 ThenPrint "You are overdrawn"Print "Authorities have been notified"

End If

… Ifار-2 Then…ElseIf conditions Then

VB expressionsElse

VB expressionsEnd If



If Balance - Check < 0 ThenPrint "You are overdrawn"

Print "Authorities have been notified"Else

Balance = Balance - CheckEnd If

If Balance - Check < 0 ThenPrint "You are overdrawn"Print "Authorities have been notified"

ElseIf Balance - Check = 0 ThenPrint "Whew! You barely made it"Balance = 0

ElseBalance = Balance - Check

End If

If Age = 5 Then

Category = "Five Year Old"ElseIf Age >= 13 and Age <= 19 Then

Category = "Teenager"ElseIf (Age >= 20 and Age <= 35) Or Age = 50 Or (Age >= 60 and Age <= 65) Then

Category = "Special Adult"ElseIf Age > 65 Then

Category = "Senior Citizen"Else

Category = "Everyone Else"End If

If you have a lot of conditional statements, using If..Then..Else

could be very messy



Switch … caseار-3

For multiple conditionalstatements, it is better to use

Select Case

Select Case expression

Case value1Block of one or more VB statementsCase value2

Block of one or more VB StatementsCase value3

Block of one or more VB statements

Case value4..

Case Else Block of one or more VB Statements

End Select



Select Case AgeCase 5

Category = "Five Year Old"

Case 13 To 19Category = "Teenager"Case 20 To 35, 50, 60 To 65

Category = "Special Adult"Case Is > 65

Category = "Senior Citizen"

Case ElseCategory = "Everyone Else"

End Select

) رح ل ر د ق ل ا ي ف ن نص ر و ح ة م A, B, C(، ل ق م ل ا ر د ق ل ا ى ط ي ف High distinct أPass. ها



Dim grade As String

Private Sub Command1_Click()grade = Text1.TextSelect Case grade

Case "A", "a"Label1.Caption = "High Distinction"

Case "A-", "a-"Label1.Caption = "Distinction"

Case "B", "b"Label1.Caption = "Credit"

Case "C", "c"Label1.Caption = "Pass"

Case ElseLabel1.Caption = "Fail"

End Select

End Sub

Private Sub Form_Load()Text1.Text = ""

End Sub



Loopsالحقت

-Do…WhileDo whileالمر1 condition

Block of one or more VB statementsLoop

Do


Loop while condition

Do until condition


Loop

Do


Loop until condition

لشط ل ذ فى condition ؤي حى أ ى ح ى ل إ



Counter=1

Do while counter <=10

Label1.caption=counter

Counter=counter+1

Loop

Counter=1

Do until counter =10


Counter=counter+1loop

Counter=1

Do


Counter=counter+1

Loop while counter <=10

Counter=1

Do


Counter=counter+1

Loop until counter =10



-For…Nextاالمر2for variable = start value to end value step

Block of VB statements

next variableFor counter = 0 To 10

Msg Box = "This is loop number"& Str$ ( counter )

Next Counter

For counter = 9 To 0 step – 1

Msg Box = " This is loop number:" & Str$ (counter )

Next counter.

لى إ ؤ ي د ق ك ل ة ل ة ل غ م ة ب ل م ا ئ ر ذ ح لك ى ع ا ث ة ئ ا ه ل ق ى ل إ صي ل غ ل ة ئ ا ه ن ة ح

For i = 0 To 4I = 0Next i



لحقت ا يش

For i=1 to 10

For j=1 to 10

Block of VB statements

Next j

Next i Exitار

For 1 = 1 To 20If A > B Then Exit for

Next i

Counter = 10Do while counter < 20

Counter = counter + 1If A > B Then Exit Do

Loop



بة سحل ا ة ل ا نج ر ب ل و

بة سحل ا ة ل ا ى ح نج ر

شل ا ى ف م ة ي ق ي ق ح ل ا

Dim operation As StringDim FirstNum As StringDim SecondNum As String

Dim value As DoubleDim value1 As DoubleDim value2 As DoubleDim flag As Integer

Private Sub cmd0_Click()If flag = 0 ThenIf FirstNum = "" ThenLabel1.Caption = ""FirstNum = FirstNum + "0"ElseFirstNum = FirstNum + "0"End If Label1.Caption = FirstNum

Else

If SecondNum = "" ThenLabel1.Caption = ""SecondNum = SecondNum + "0"ElseSecondNum = SecondNum + "0"End If Label1.Caption = SecondNum

End If

End Sub




ElseIf SecondNum = "" ThenLabel1.Caption = ""SecondNum = SecondNum + "1"

ElseSecondNum = SecondNum + "1"End If Label1.Caption = SecondNum

End If End Sub




End If End Sub

Private Sub cmd3_Click()If flag = 0 ThenIf FirstNum = "" ThenLabel1.Caption = ""FirstNum = FirstNum + "3"

ElseFirstNum = FirstNum + "3"End If Label1.Caption = FirstNum


ElseSecondNum = SecondNum + "3"

End If Label1.Caption = SecondNum

End If End Sub



Private Sub cmd4_Click()If flag = 0 ThenIf FirstNum = "" ThenLabel1.Caption = ""FirstNum = FirstNum + "4"Else

FirstNum = FirstNum + "4"End If Label1.Caption = FirstNum



End If End Sub


Else



ElseSecondNum = SecondNum + "5"

End If Label1.Caption = SecondNum

End If End Sub

Private Sub cmd6_Click()If flag = 0 Then

If FirstNum = "" ThenLabel1.Caption = ""FirstNum = FirstNum + "6"Else




End If End Sub





ElseIf SecondNum = "" ThenLabel1.Caption = ""SecondNum = SecondNum + "7"ElseSecondNum = SecondNum + "7"End If Label1.Caption = SecondNum

End If End Sub





End If End Sub




End If End Sub



Private Sub cmdDiv_Click()operation = "÷"flag = 1value1 = Val(Label1.Caption)End Sub

Private Sub cmdMinus_Click()operation = "-"flag = 1value1 = Val(Label1.Caption)

End Sub

Private Sub cmdMul_Click()

operation = "X"flag = 1value1 = Val(Label1.Caption)

End Sub

Private Sub cmdPlus_Click()operation = "+"flag = 1

value1 = Val(Label1.Caption)End Sub

Private Sub Form_Load()flag = 0Label1.Caption = ""cmdOFF.Caption = "OFF"

End Sub

Private Sub cmdOFF_Click()If cmdOFF.Caption = "OFF" Thencmd0.Enabled = Falsecmd1.Enabled = Falsecmd2.Enabled = Falsecmd3.Enabled = Falsecmd4.Enabled = Falsecmd5.Enabled = False

cmd6.Enabled = Falsecmd7.Enabled = Falsecmd8.Enabled = Falsecmd9.Enabled = FalsecmdPlus.Enabled = FalsecmdMinus.Enabled = FalsecmdMul.Enabled = FalsecmdDiv.Enabled = FalsecmdEqual.Enabled = FalsecmdCancel.Enabled = False

cmdOFF.Caption = "ON"Elsecmd0.Enabled = Truecmd1.Enabled = Truecmd2.Enabled = Truecmd3.Enabled = Truecmd4.Enabled = Truecmd5.Enabled = Truecmd6.Enabled = Truecmd7.Enabled = Truecmd8.Enabled = True

cmd9.Enabled = TruecmdPlus.Enabled = TruecmdMinus.Enabled = TruecmdMul.Enabled = TruecmdDiv.Enabled = TruecmdEqual.Enabled = TruecmdCancel.Enabled = TruecmdOFF.Caption = "OFF"

End If End Sub

Private Sub cmdEqual_Click()value2 = Val(Label1.Caption)If operation = "+" Thenvalue = value1 + value2Label1.Caption = Str$(value)

End If

If operation = "-" Thenvalue = value1 - value2Label1.Caption = Str$(value)

End If If operation = "X" Thenvalue = value1 * value2Label1.Caption = Str$(value)

End If

If operation = "÷" Thenvalue = value1 / value2Label1.Caption = Str$(value)

End If FirstNum = ""SecondNum = ""End Sub

Private Sub cmdCancel_Click()Label1.Caption = ""FirstNum = ""SecondNum = ""value1 = 0value2 = 0value = 0flag = 0

End Sub

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