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the control drop down list is located in gridview i try to use the Asynchronous trigger on this dropdown list textchanged event
but how to find cotrol in gridview to specify in trigger
Posted

use update mode for update panel as conditional,

ASP.NET
<asp:updatepanel ID="Updatepanel1" runat="server" UpdateMode="Conditional">


On your dropdown's selectionchanged event add the below statement,

Updatepanel1.Update()
   
v3
Here an work around

UpdatePanel GridView DropDownList AutoPostBack Problem[^](WishStar99's reply)
   

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