Control with ID 'FileUpload1' being registered through RegisterAsyncPostBackControl or RegisterPostBackControl must implement either INamingContainer, IPostBackDataHandler, or IPostBackEventHandler.

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this is my part of code

XML

<Triggers>
              <asp:AsyncPostBackTrigger ControlID="btnsave" />
              <asp:PostBackTrigger ControlID="FileUpload1" />
          </Triggers>

please help me...

Posted 16-May-12 21:18pm

sathiserg

Updated 5-Sep-17 22:19pm

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Sandeep Mewara · Answer 1 · 2012-05-16T21:37:00

Solution 1

That's not the way to attach a trigger for file upload.

Try this:

XML

<div>
    <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager>
        <asp:UpdatePanel ID="updPanel" runat="server" UpdateMode="Conditional">
        <Triggers>
            <asp:PostBackTrigger ControlID="btnUpload" />
        </Triggers>
            <ContentTemplate>
                <asp:FileUpload ID="fupload" runat="server" /><br />
                <asp:Button ID="btnUpload" runat="server" Text="Upload"  onclick="btnUpload_Click" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>

Posted 16-May-12 21:37pm

Sandeep Mewara

v2

Comments

sathiserg 17-May-12 5:09am

Thanks,but If i use that method means the whole page is reloaded. i don't want page reload.

Sandeep Mewara 23-May-12 2:53am

You have to do full page reload for general file upload control - it works like that.

In case you need async upload and partial page update, look at the Ajaxtoolkit Async upload control.

snamyna 9-Aug-12 2:46am

Hye Sandeep Mewara.. I have encountered same problem. I have tried as you suggest, no error occurs but it still didnt work for me.
I have a fileUpload1, btnUpload, and an imagebutton1 to indicate that after user successfully uploaded a file, the imagebutton will appear. But nothing occurs. :(

Sandeep Mewara 9-Aug-12 10:10am

Not clear on what you are trying to say. Can you please open a new question with details.

robert.taylor.twu 22-Feb-15 15:09pm

Sandeep you are the only person who actually posted a way that works for handling the postback triggers on a fileupload control in update panels.. I have tried every method under the sun but yours is the first to work and I think it's because you specify putting the post back trigger right after the updatepanel declaration and right before the content template. Outstanding and many thanks!