restricting upload image size

[Bill Rowell]

ASP .NET has a built in limit of the request size (which is configurable) of
4MB. So, if a user were to upload a file that exceeded this, an exception
is thrown and a not so informative page is displayed due to the error code
being set to 400 (the page cannot be displayed page).

I found an article that had this snippet of code that you can add to
global.asax.vb that you could "hopefully" redirect the user to a more
friendly looking error page.

Sub Application_Err or(ByVal sender As Object, _
ByVal e As EventArgs)
' Fires when an error occurs
' Check to see whether we came
' from the upload form
If Path.GetFileNam e(Request.Path) = _
"UploadForm.asp x" Then
' Get the error details
Dim appException As System.Exceptio n = _
Server.GetLastE rror()
Dim checkException As HttpException = _
CType(appExcept ion, HttpException)
' Verify the expected error
If checkException. GetHttpCode = 400 And _
checkException. ErrorCode = -2147467259 Then
' Error 400 = bad request, user
' tried to upload a file that's too large
Session("ImageT ooLarge") = True
Server.ClearErr or()
' Go to the original target page
Response.Redire ct("UploadForm. aspx")
End If
End If
' For other errors, just accept the default processing
End Sub
From what I've tested so far, it doesn't work. Has anyone out there tried
something similar and had any amount of success? This is a pretty big issue
for our application and we'd like to try and fix it. Thanks.

Regards,
Bill Rowell