ASP.net memory usage during download

Question

On an ASP.net site at my place of work, the following chunk of code is responsible for handling file downloads (NOTE: Response.TransmitFile is not used here because the cont

Answer 1

Here is some code that I am working on for this. It uses an 8000 byte buffer to send the file in chunks. Some informal testing on a large file showed a significant decrease in memory allocated.

int BufferSize = 8000;
FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
try {
  long fileSize = stream.Length;

  long dataLeftToRead = fileSize;
  int chunkLength;
  buffer = new Byte[BufferSize];

  while (dataLeftToRead > 0) {
    if (!Response.IsClientConnected) {
      break;
    }
    chunkLength = stream.Read(buffer, 0, BufferSize);

    Response.OutputStream.Write(buffer, 0, chunkLength);
    Response.Flush();

    dataLeftToRead -= chunkLength;
  }
}
finally {
  if (stream != null) {
    stream.Close();
}

edited to fix a syntax error and a missing value