learning by sample ajax control toolkit - rating
DESCRIPTION
For more tutorial visit www.bukansembarang.infoTRANSCRIPT
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AJAX Control Tookit : Rating 2010
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AJAX Control Tookit :
Rating
Learning By Sample Series
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Foreword
Learning By Sample ?
So, why should I made this tutorial freely accessed by everyone ? Well, surely I am just nobody, I
also just another ordinary person with ordinary knowledge. However, I always feel that some persons in
the internet giving away their tutorial for free and I feel being helped by them. Then, I remember one of
my senior wisdom words : “If you want to be given more, then start to give more”. And of course, I really
believe those words, since that I already proof it to be right all the time.
Also, I’m not an English native speaker, however, I just try to improve my English in any other
way, especially in written format. Thus, I think writing is the best practice to improve my English freely.
However, you will find many grammatical errors in my tutorial, so please send me comments and also
suggestion to improve it.
Then, why the format using Learning By Sample series ? Is it really different with other tutorials
out there ? Ehm, I already wrote three books (in Indonesian) using this kind of format, and many readers
already contact me about how this format really help them to learn from the scratch. So, why in the
world I’m not re-create it in English format, right ? Eventhough actually, it is similar with Hands On Lab
series which already famous in Microsoft site previously.
All of my lesson also being designed as short samples and short time exercise. Thus, I hope that
each of tutorial series would take only at least 10-15 minutes maximum to learn. Why keep it short ?
Because many beginner (and even expert) will find boring whenever they must keep studying more than
15 minutes (but you will never get bored when you online in such time right ?).
Another reason is just because many of samples in this series come up from my lecturing task
exercise. So, I just try to compile all my lab exercises in order to keep it tidy and also reusable for my
students. That’s why you will find many unsorted course material inside these series, however, just take
a seat and enjoy the ride !
Requirements
In this series, I try to give simple example about AJAX Control Toolkit. Thus, as you may know
that this toolkit is an open source code and (of course) free to use. Eventhough many programmers
never care about its source code, however, this toolkit really do a lot of fun things in web programming.
All of my samples in this series use Visual Web Developer 2010 Express edition with its SQL
Server Express edition along together. But if you want to try the sampe using Visual Studio in
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commercial license (and please don’t use the illegal version), it still can do. And also, you must download
the newest version of AJAX Control Toolkit from www.codeplex.com, just type the name in search
textbox, and you will get it. After extracting all of the package of toolkit, look for AjaxControlToolkit.dll
file inside folder AjaxControlToolkitSample/bin. This file will be the main actor of all the example in this
series.
Prior Knowledge needed
If you really want to follow this series, then you should aware that basic programming
knowledge is needed. You should also familiar with ASP .NET especially for version 3.5 above. And of
course you already know what is the difference between website which use AJAX technique and “old
common website”.
FYI, I’m a VB guy, so please don’t complaint if I use VB entirely in this series. But nowadays,
there’s no such useful things if we argue about language differences, because I just try to share
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something that I know. So, if you don’t like VB and want to have another tutorial with your own favourit
language, then I’d be happy to read it. Now, let’s get started…….
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Preparation
1. If you are really new in AJAX Control Toolkit matter or you have not read previous tutorial, then you
should follow these steps. However, if you already sure about AJAX Control Toolkit and just want to
increase your skill, or if you already follow previous tutorial, then just skip this chapter.
2. First, ensure that you already open Visual Web Developer 2010 Express Edition
3. Create a newly blank website and give it a name
4. Now, let’s create a new blank web page
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5. Afterward, put the AJAX Control Toolkit in our website.
a. First, copy the AJAXControlToolkit.dll from downloaded folder
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b. Create special folder bin in your solution explorer
c. Then paste the dll file into your bin folder
d. Next, go to your Toolbox and right click inside it and click Choose Item sub menu
e. In the dialog box, click button Browse
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f. Then choose the .dll file which reside in your bin folder
g. And after you click OK button, you will see bunch of new control in your Toolbox. So, it
means that we are ready to continue this sample…..
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6. Now, the first step in implementing AJAX Control Toolkit is dragging component
ToolkitScriptManager on top of your web page (or just simply double click it).
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Let’s Get Started
1. Let’s try to put something in the webpage. I start with a table which will handle our dummy
input simulation.
a. Click menu Table� Insert Table
b. In dialog box, we create table with three rows and two columns
2. Merge the second row of table.
a. Do this step by selecting two columns from second row and right click at your mouse,
thus it will show up a pop up menu
b. Then choose Modify � Merge Cells
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3. Next, fill some texts in the table at first row
4. Put a Literal control at second row (remember this row already merged before…)
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5. Since that Rating extender is not a visible control, thus we need a set of images which will be our
rating representation. In this sample, I just took star images sample from AJAX Control Toolkit
sample itself. You can find this set of images in folder AJAXControlToolkitSample/images or you
just can download it from my site.
a. There are three star images which are :
EmptyStar.png :
FilledStar.png :
SavedStar.png :
b. Copy all of them and paste it in your Solution Explorer :
6. Now, let’s create a style sheet file which will handle our Rating control.
a. Add New Item at Solution Explorer by right clicking your mouse at Solution Explorer
b. Then choose Style Sheet file
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c. Next, type this source at your new style sheet
7. Then it’s time to put the style sheet in our page. Just go back to your web page and switch it to
Source mode
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a. Drag style sheet file from Solution Explorer under <title></title>
b. Next, drag Rating extender at second column of first row
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8. Okay, let’s set the property of this little thing by filling something in Property window or for
shorter time, we just type it all.
9. Now, you can switch into design mode and see if it already turn out into something like this
figure :
10. If you already got the design, just shift into source code mode and let create something in
source code
a. First, import AJAXControlToolkit namespace at top of your source code
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b. Then, type this procedure
11. So, what happen in that procedure ?
a. First, remember that this procedure will be executed whenever user click at our Rating
(see the previous setting of Rating control)
b. So, you can see that we must put RatingEventArg as parameter in our procedure
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c. The rating result will be put in a text file named as rating.txt.
d. And we must ensure whenever the file is exist (then we just read the value from the text
file) or not (it means that we just newly create it, so we must set default value as zero).
The value (new or not) will be placed in xRating variable
e. You also recognize that the value of xRating then split as string array named as xQty,
this new array then filled with new value which comes from current rating chosen by
user.
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f. Afterward, just put the result in Literal control.
g. Last but not least, we must save the new rating value back into the text file after joining
all of the array value into one string again.
12. Well, now it’s time to test this page, just press Ctrl+F5 and see the result.
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13. Oh My God, it’s so easy. Well, I must drink my hot black coffe first, so see you next time…..