Question

I have ASP.NET application which allows users to download a file when he/she enters a password. I use code below to send file to user:

Context.Response.Clear();
Context.Response.ContentType = "application/pdf";
Context.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
Context.Response.BinaryWrite(File.ReadAllBytes(fileName));
Context.Response.Flush();
Context.Response.Close();   

The problem is that the downloads become very slow if the files are more than 1mb or many users are downloading files at the same time. Is it possible somehow to optimize code for better performance?

Answer 1

You might use Response.TransmitFile(/* Your file */); instead of Response.BinaryWrite(/* Your file */);

The TransmitFile()-Method writes the data to the HTTP output stream without storing it in the memory.