ASP.NET MVC中下載方式

1. PDF下載：return File(_pdfFilePath, "text/plain", Url.Encode(downName));
2. Excel下載：return File(ms, "application/ms-excel", Url.Encode(downName));
3. Word下載：return File(ms, "application/ms-word", Url.Encode(downName));

（說明：_pdfFilePath表示文件路徑，downName表示下載文件名稱；ms = new MemoryStream();）