Re: File Upload weirdness...

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The online help mentions something about using a file upload control within an ajax panel. Maybe this helps?
"The FileUpload control is designed to be used only in postback scenarios and not in asynchronous postback scenarios during partial-page rendering. When you use a FileUpload control inside an UpdatePanel control, the file must be uploaded by using a control that is a PostBackTrigger object for the panel. UpdatePanel controls are used to update selected regions of a page instead of updating the whole page with a postback. For more information, see UpdatePanel Control Overview and Partial-Page Rendering Overview."

"Regan" <regan.thomas@xxxxxxxxxxx> wrote in message news:eSJ3D1KhIHA.2540@xxxxxxxxxxxxxxxxxxxxxxx
Ok,

So, I'm a .NET/AJAX web application (VB.NET) and in one of my content screens, among a barrage of controls and panels, I have a File Upload control... nothing fancy.
Below the control there is a standard button called aFile_btn.

This is the click event of aFile_btn:
---------------------------------------------------------------
Protected Sub aFile_btn_Click(ByVal sender As Object, ByVal e As System.EventArgs)
If FileUpload1.PostedFile.FileName <> "" Then
End If
End Sub
--------------------------------------------------------------

Simple? I thought so. But when I run the app and click aFile_btn I get the following error on the "If" line:

Object reference not set to an instance of an object.

You think that's frustrating? there's more. If I copy and paste the exact code behind the button onto a fresh page, with only a FileUpload control and a Button, it works perfectly...........

.

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