How to force download a file using ASP.NET

December 8, 2011 in ASP.NET, C#


There are many cases where we need to let file downloads being processed by an aspx file. Here in this code this code will force a file to be downloaded through an aspx file. let assume your file path  is in “string path” variable. Add this code in your aspx file cs file.

 


string path = "the path to your file";
string fileName = "Add your file name";
string contentType= "Add your file content type. ex: for text file it is 'text/plain'";
string contentLength = "add string presentation of your file size in bytes";

response.Clear();
response.ClearHeaders();
response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
response.AddHeader("Content-Length", contentLength);
response.ContentType = contentType;
FileStream f = new FileStream(path, FileMode.Open);
byte[] buffer = new byte[8 * 1024];
int len;
while ((len = f.Read(buffer, 0, buffer.Length)) > 0)
{
    response.OutputStream.Write(buffer, 0, len);
}
response.OutputStream.Flush();
response.OutputStream.Close();
response.Flush();
response.Close();
response.End();

Related posts:

To make money we lose our health, and then to restore our health we lose our money.... We live as if we are never going to die, and we die as if we never lived!

Leave a Reply