Tips and Tricks: ASP.NET AJAX 1.0 and User Controls
page 7 of 10
by Bilal Haidar
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What to choose?

We have seen several scenarios throughout this article that discuss how to handle UserControls when AJAX is to be added to a website. One would ask which scenario is best to follow. Well the normal answer would be it depends on the situation you are experiencing. However, we do not like normal answers and we would be strict in saying that, it is recommended to leave the UserControls intact and add your AJAX controls to the host pages themselves. Then you can either use Triggers or a programmatic call to update method of the UpdatePanel for refreshing the content of any UpdatePanels.


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User Comments

Title: very nice   
Name: Serif Emek
Date: 2009-07-28 5:32:09 PM
Comment:
That is just what I was looking for.
Thanks
Title: Re: Vbman   
Name: Bilal Haidar [MVP]
Date: 2008-03-27 10:38:17 AM
Comment:
Hello,
Try to show me the code behind of the usercontrol and how you are setting it on the page!

Thanks
Title: Object reference not set to an instance of an object.   
Name: Vbman
Date: 2008-03-27 10:05:40 AM
Comment:
Great Article!
I have the update panel on the page and the user controls inside the update panel.
I create a property inside the usercontrol that accesses a control, Say the gridviews Tooltip or Pagesize or ...
When I try to set the property on page declaratively I get an error:
Object reference not set to an instance of an object.

I've seen this problem posted in other places but no solution.
Have you run into this and do you have a work around.

Thanks!
Title: Re:   
Name: Bilal Haidar
Date: 2007-10-30 10:43:12 AM
Comment:
Hello,
You can use this converter:
http://bhaidar.net/cs/archive/2007/04/18/telerik-c-vb-net-converter.aspx

Regards
Title: VB.Net   
Name: Jo
Date: 2007-10-30 5:51:05 AM
Comment:
Article is so good. If it is available in vb.net also it will be helpful for the beginners.
Title: Well explained   
Name: Jose
Date: 2007-08-09 4:44:16 AM
Comment:
As usual, you did a great job!

I loved the fact that you showed all the possible combinations you can have with a gridview user control and AJAX. And the sample works really fine!

Jose
Title: Great   
Name: Mark W
Date: 2007-06-25 9:24:07 PM
Comment:
Very well summarized, thanks. I agree, good use of events and generics.

Also, there's a small typo in Listing 5: OrderList UC's UpdatePanel ID should be 'AjaxPanel'.
Title: Nice one   
Name: Wesley Bakker
Date: 2007-06-24 4:32:51 AM
Comment:
Nice article. Decent use of events, AJAX, generics, datasourcecontrols etc. etc.

Cheers,
Wes






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