AJAX :: FileUpload Controls Does Not Work Inside An Updatepanel

Feb 26, 2010

I use a tabcontrol with 2 tabs. In the second tabpanel as seen in the code I use a Fileuploadcontrol to upload Images from a users computer.

The problem is that I need to surround the tabcontrol with an updatepanel as I dont want a fullpage postback when switching between these 2 tabpanels. In this code I have the tabcontrol inside an updatepanel but the problem is that the Fileupload controls does not seem to work inside an updatepanel.

How will I solve this problem as I dont want a fullpage postback when switching between the tabs ?

[Code]....

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Following is my html design 

<asp:UpdatePanel ID="up1" runat="server"><ContentTemplate>
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<asp:Label ID="Label1" runat="server" Text=""></asp:Label>   </ContentTemplate></asp:UpdatePanel>

and 

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}

without update panel it works fine.after place all control inside update its not working. How to fix this...

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Dec 1, 2010

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[Code]....

And my codebehind is:

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I cannot use asyncFileUpload as it has too many restrictions which doesn't meet our requirement.

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page:

[Code]....

Code:

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Protected Sub SaveGrid()
For Each Row As GridViewRow In Me.gvLineItems.Rows
Dim f As FileUpload = CType(Row.FindControl("fuAttachment"), FileUpload)
'todo: this part is not working
If f.FileName.Length > 0 Then 'returns 0 always
'this returns 0.
end if
if f.HasFile() then
'this also returns false
end if
Next
End Sub

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<asp:FileUpload Width="90px" Font-Size="xx-small" ID="fuAttachment" runat="server" />

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[Code]....

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[Code]....

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[Code]....

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[Code]....

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