Problem with Upload Error handling

[Guest]

Problem with Upload Error handling

When the user uploads the file greater than the length specified in
web.config/machine.config, I always see the DNS Error page eventhough I have
handled the error Page_Error Event.

And this is my code in Page_Error event,


Private Sub Page_Error(ByVal sender As Object, ByVal e As
System.EventArgs) Handles MyBase.Error

Dim ex As Exception = Server.GetLastError.GetBaseException

If TypeOf (ex) Is HttpException Then

Dim oEx As HttpException = CType(ex, HttpException)
If oEx.ErrorCode = -2147467259 Then
Dim ErrorLabel As New Label
ErrorLabel.ForeColor = System.Drawing.Color.Red
ErrorLabel.Text = "La dimensione del file supera la
dimensione massima consentita di 4MB"
Dim oCell As New HtmlTableCell
oCell.Controls.Add(ErrorLabel)
trUpload.Cells.Add(oCell)
Server.ClearError()
Response.ClearHeaders()
Response.Status = "200 OK"
Response.End()
Else
Throw New ApplicationException(oEx.Message, oEx)
End If
Else
Throw New ApplicationException(ex.Message, ex)
End If

End Sub


I tried to set later just to get rid of DNS Error

Response.Status = "200 OK"
Response.End()

But in vain.

Can anyone shed some light on this? Why so Response.Status does not work?

TIA,
Holy

 

[Patrice]

IMO the problem is that this check is done before your page even loads. You
should be able to catch this in the Application-Error event rather than in
the Page_Error event...

 

[bruce barker]

there is no cancel upload command the server can send, so when the
upload is too big, the server closes the connection. this means the
server can not send back a response, and the browser displays failed
request error (dns in IE)

-- bruce (sqlwork.com)

 

[Guest]

I solved this problem by setting maxrequestlength to 10 MB, but via code I
check for my Quota (say 5MB). I suppose this is only way to get rid of this
problem. Correct me if I am wrong. This workaround also fails if the user
tries to upload the file > 10 MB.

Thanks all,
Holy