Brettle Development

This is a limitation of the web server.
You have to send the data in chunks.

I appended the source code example of Microsoft from the corresponding kb article.

I had to change just one line of code and it worked.

Andreas

        protected bool sendData(string filepath) {
            bool rc = false;
            System.IO.Stream iStream = null;

            // Buffer to read 10K bytes in chunk:
            byte[] buffer = new Byte[10000];
            // Length of the file:
            int length;
            // Total bytes to read:
            long dataToRead;
            // Identify the file to download including its path.
            //string filepath  = "DownloadFileName";

            // Identify the file name.
            string  filename  = System.IO.Path.GetFileName(filepath);
            try
            {
               // Open the file.
               iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
                        System.IO.FileAccess.Read,System.IO.FileShare.Read);
               // Total bytes to read:
               dataToRead = iStream.Length;
                // Nun löschen wir den Puffer ...
                Response.Clear();
               Response.ContentType = "application/octet-stream";
               Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
               // Read the bytes.
               while (dataToRead > 0)
               {
                  // Verify that the client is connected.
                  if (Response.IsClientConnected)
                  {
                     // Read the data in buffer.
                     length = iStream.Read(buffer, 0, 10000);
                     // Write the data to the current output stream.
                     Response.OutputStream.Write(buffer, 0, length);
                     // Flush the data to the HTML output.
                     Response.Flush();
                     buffer= new Byte[10000];
                     dataToRead = dataToRead - length;
                  }
                  else
                  {
                     //prevent infinite loop if user disconnects
                     dataToRead = -1;
                  }
               }
               rc = true;
            }
            catch (Exception ex)
            {
               // Trap the error, if any.
               if (log.IsErrorEnabled) log.Error("Error : " + ex.Message);
            }
            finally
            {
               if (iStream != null)
               {
                  //Close the file.
                  iStream.Close();
               }
            }
            return rc;
        }