AJAX Extender Example: Button Enabled Changes
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by Brian Mains
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A Word about Custom Extenders

Custom extenders, like custom controls, will have more volatility toward change on the server-side than on the client side. When developing components using the ASP.NET AJAX framework (not shown here) or the AJAXControlToolkit, there are some differences between the two approaches. But in the JavaScript client components, there is not.  It is the same approach, and it does not really change. In the future, as new additions come out from Microsoft, it still will not change as much as the server-code can, which is a good thing.

Developing these scripts by hand can be more difficult though, simply because of the sheer volume of code. I use CodeSmith Studio to generate my ASP.NET AJAX code, which I custom developed a script for my need. It was not overtly difficult to setup, and the benefits paid off immediately.

Once you learn the constructs to ASP.NET AJAX, it stays the same, so the major challenge is the initial learning curve. After that, the scripting portion is not that difficult at all; most of the difficulty comes from figuring out the complex processing logic and state management aspects.


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User Comments

Title: svfd   
Name: fgdfg
Date: 2012-12-12 7:36:25 AM
Comment:
egte
Title: hello   
Name: hello
Date: 2012-08-22 12:38:27 AM
Comment:
hello
Title: eeee   
Name: aaa
Date: 2012-08-08 2:21:21 AM
Comment:
jjjj
Title: dropdown list   
Name: Vrutti Shah
Date: 2011-11-23 4:47:12 AM
Comment:
I have two dropdown list. I get value of dropdownlist 1 from database. based on the selected value of dropdown 1, dropdown list 2 is populated. I have success in that but problem is that after select value from dropdown 1 page is load and data is lost from another tools like textbox(password type). pls do helpful.
my mail id is:vruttishah1986@gmail.com
Title: Useful information   
Name: pickatutorial.com
Date: 2010-10-05 11:30:12 AM
Comment:
Very useful article. Thanks.
Title: Reply: how to set data in text box based on ajax autocomple   
Name: Brian Mains
Date: 2010-03-11 3:22:38 PM
Comment:
Hello,

Auto complete has a client-side API; you would have to look to see an event that fires when the first text entry is selected, then set the value for textbox2.

HTH.
Title: how to set data in text box based on ajax autocomple   
Name: ieda
Date: 2010-03-10 4:04:46 AM
Comment:
i have two text box.Texbox1 and textbox2.Both use same table in database.Texbox1 use ajax extender autocomplete to select the data. What can i do if i want textbox2 set data aumatically from database after i select data for textbox1?
Title: Re:Button Extender   
Name: Brian
Date: 2008-10-06 3:08:21 AM
Comment:
I tested the code but i cannot achieve your test2 result.
Title: thanks   
Name: Karthikeyan
Date: 2008-09-24 7:54:24 AM
Comment:
Nice article.
Title: thanks   
Name: rezagolab
Date: 2008-09-24 3:10:50 AM
Comment:
hi
thanks
Title: Re:Button Extender   
Name: NamNguyenLe
Date: 2008-08-28 10:15:30 PM
Comment:
Thanks for cool article.
But it will be better if code is avaiable.
Please post it please.






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