' Open the standard dialog to download a file located on the server' whose virtual path is passed as an argument. This routine is useful when' you want to download a file that is otherwise processed by IIS. ' This routine must be included in an asp.net page, so that it can access ' the Server and Response objects.Sub DownloadFile(ByVal virtualPath As String) ' retrieve the physical path of the file to download, and create ' a FileInfo object to read its properties Dim FilePath As String = Server.MapPath(virtualPath) Dim TargetFile As New System.IO.FileInfo(FilePath) ' clear the current output content from the buffer Response.Clear() ' add the header that specifies the default filename for the Download/ ' SaveAs dialog Response.AddHeader("Content-Disposition", "attachment; filename=" + _ TargetFile.Name) ' add the header that specifies the file size, so that the browser ' can show the download progress Response.AddHeader("Content-Length", TargetFile.Length.ToString()) ' specify that the response is a stream that cannot be read by the ' client and must be downloaded Response.ContentType = "application/octet-stream" ' send the file stream to the client Response.WriteFile(TargetFile.FullName) ' stop the execution of this page Response.End()End Sub


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