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Topic: How to use file upload control inside update panel in C# ASP NET

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User: rajiv100 Post Date: 13 Apr 2011 03:04

Introduction:
Asp.net asp:FileUpload control will not work inside Update panel
For that you need to use PostBackTrigger



Main Content:


use it as below.

<ajax:UpdatePanel ID="UpdatePanel1" runat="server">

  <Triggers>

  <ajax:PostBackTrigger ControlID="ButtonUpload" />

  </Triggers>

  <ContentTemplate>




<asp:FileUpload ID="FileUpload1" runat="server" Width="300px" />

         

<asp:Button ID="ButtonUpload" runat="server" Text="Upload" OnClick="ButtonUpload_Click" />


</ContentTemplate>

</ajax:UpdatePanel>



Conclusion:
Beacuse of Update Panel Partial update feature and event sequence
ButtonUpload_Click event will not be able to get the selected file
if ajax:PostBackTrigger is not used.



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