I have an asp.net application that has a feature to allow a user to see a pdf. The system does not know whether or not the pdf exists - so it does a file.exists() then calls the function to send the pdf to the browser.

On my test server here, it works fine. I have put it on a production webserver, and I get a corrupted pdf. Here's the code that does it;

        Private Sub fi_exportfiletopdf(ByVal pcFile As String, ByVal pckey As String)
            ' this method will redirect the user to a pdf
            ' the system will prompt them to open the file or save it
            ' the pdf is opened in a separate window
            Response.Clear()
            Response.Buffer = True
            Response.ContentType = "application/pdf"
            Response.AddHeader("content-disposition", "attachment;filename=" + pckey + ".pdf")

            Response.Charset = ""
            Me.EnableViewState = False
            Dim oFileStream As FileStream
            Dim FileSize As Long

            oFileStream = New FileStream(pcFile, FileMode.Open)
            FileSize = oFileStream.Length

            Dim Buffer(CInt(FileSize)) As Byte
            oFileStream.Read(Buffer, 0, CInt(FileSize))
            oFileStream.Close()

            Response.OutputStream.Write(Buffer, 0, FileSize)
            Response.Flush()
            Response.Close()



        End Sub

I can actually browse to the file directly, and it works fine - somehow in the code, the pdf is being corrupted on this box. Any ideas?