Programmatically adding triggers to an UpdatePanel - Microsoft AJAX Library and ASP.NET 2.0 AJAX Extensions

Tuesday, September 26, 2006

AJAX Atlas

If you want to add a control to fire the UpdatePanel, you have to add the trigger. You add this through the ScriptManager control. The method is .RegisterAsyncPostBackControl(ControlName);

I put this call in the Page_PreInit() method. I put it there because of some other Atlas stuff was doing that needed an early place in the page lifecycle. .RegisterAsyncPostBackControl() will also work in the Page_Load() event.

Original post: http://morewally.com/cs/blogs/wallym/archive/2006/09/20/359.aspx

2 Comments

One could just do it by using AsynChronousTrigger Class:
AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
trigger.ControlID = mydropdownlist.ID;
trigger.EventName = "SelectedIndexChanged";
updateImage.Triggers.Add(trigger);

sangam100 - Wednesday, December 17, 2008 7:57:25 AM

In above code, updateImage is the name of any updatePanel. In my case i did it for images. so i named it updateimage.

sangam100 - Wednesday, December 17, 2008 7:58:11 AM

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