下载文件

--下载方式 

FileInfo DownloadFile = new FileInfo(filePath);
                Response.Clear();
                Response.ClearHeaders();
                Response.Buffer = false;
                Response.ContentType = "application/octet-stream";
                Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
                Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
                Response.WriteFile(DownloadFile.FullName);
                Response.Flush();
                Response.End();

 

--直接浏览的方式
                //FileStream fs = new FileStream(filePath, FileMode.Open);

                //byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, bytes.Length);

                //fs.Close();

                //Response.ContentType = "application/octet-stream"; //通知浏览器下载文件而不是打开 Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));

                //Response.BinaryWrite(bytes);

                //Response.Flush();

                //Response.End();