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[How Do I:] Trigger an UpdatePanel Refresh from a DropDownList Control? • • 2 minutes to read • Contributors • • • In this article by In most of our videos on the ASP.NET AJAX UpdatePanel, we have used a Button control to cause an UpdatePanel to refresh its content. Yet we may use any event raised by any other ASP. Download Yump3 Eu Music more. NET server control. This video uses the SelectedIndexChanged event of the DropDownList control as a trigger for refreshing an UpdatePanel control. We see also how we can dynamically change the stylesheet class associated with the controls contained in the UpdatePanel control.

Yes, i have placed a breakpoint on the event and that is how I know it is not firing and what prompted me to post here. AutoPostBack is set to true and page_load event fires. EnableViewState is set to true.

Dropdownlist in Update Panel not firing SelectedIndexChanged. Dropdownlist in Update Panel not firing. Dec 18, 2006 Hi Jasson, Thanks for the reply. But this is not I am looking for. Pc Alien Shooter 3 Downlod on this page. When you keep both the dropdowns in the same update panel.

*Plan: Protected Sub ddlAddDepPlans_SelectedIndexChanged( ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlAddDepPlans.SelectedIndexChanged End Sub The data to populate the ddl is NOT being bound in the page_load event. Jfkrueger Yes, i have placed a breakpoint on the event and that is how I know it is not firing and what prompted me to post here. AutoPostBack is set to true and page_load event fires. EnableViewState is set to true. *Plan: Protected Sub ddlAddDepPlans_SelectedIndexChanged( ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlAddDepPlans.SelectedIndexChanged End Sub The data to populate the ddl is NOT being bound in the page_load event. That's because you haven't set the OnSelectedIndexChanged event in the Mark Up. So add the highlighted line below in your DDL mark up Hope that Helps!

Hey Vincent, I don't need to set the onselectedindexchanged property on the control as the vb handler has the Handles clause at the end of it. I did try it that way at one point out of desperation but I got the same results. Let me try and rephrase.