asp.net-mvc ActionResult Return a File
Example
An ActionResult can return FileContentResult by specifying file path and file type based from extension definition, known as MIME type.
The MIME type can be set automatically depending on file type using GetMimeMapping method, or defined manually in proper format, e.g. "text/plain".
Since FileContentResult requires a byte array to be returned as a file stream, System.IO.File.ReadAllBytes can be used to read file contents as byte array before sending requested file.
public class FileController : Controller
{
public ActionResult DownloadFile(String fileName)
{
String file = Server.MapPath("~/ParentDir/ChildDir" + fileName);
String mimeType = MimeMapping.GetMimeMapping(path);
byte[] stream = System.IO.File.ReadAllBytes(file);
return File(stream, mimeType);
}
}
