Question

I asked this question and have now got it mostly working.

However I am still getting the titled error and cannot seem to find any reference to anyone that has solved it.

This is driving me insane!

My ASHX C# code looks like this;

context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.Buffer = true;
context.Response.Charset = "";
context.Response.AddHeader("Content-Disposition", "inline;filename=file.pdf"); 
context.Response.ContentType = "application/pdf";

Stream fileStream = publishBookManager.GetFile();
byte[] buffer = new byte[32 * 1024];
using (MemoryStream ms = new MemoryStream())
{
  int read;
  while ((read = fileStream.Read(buffer, 0, buffer.Length)) > 0)
  {
    ms.Write(buffer, 0, read);
  }
}

context.Response.BinaryWrite(buffer);
context.Response.Flush();
context.Response.Close();

And my jQuery / javascript looks like;

window.open('/UserControls/download.ashx?format=pdf&bookId=' + bookId, "pdfViewer");

Answer 1

There’s several problems with this code – you write out the content of buffer when you probably meant to write out the contents of your memory stream, which you dispose of without using – but why not just do

fileStream.CopyTo(context.Response.OutputStream);