1  string fileName = strname;//客户端保存的文件名  我最红.mp3
 2             string filePath = Server.MapPath(strfilepath);//路径
 3 
 4 
 5             //FileInfo fl = new FileInfo(filePath);
 6             FileStream fs = new FileStream(filePath, FileMode.Open);
 7 
 8             byte[] bytes = new byte[(int)fs.Length];
 9             fs.Read(bytes, 0, bytes.Length);
10             fs.Close();
11             Response.ContentType = "application/octet-stream";
12             Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
13 
14 
15             //filePath = "AA" + filePath + "ZZ";
16             //string encode = "";
17             //byte[] bytes = Encoding.GetEncoding(54936).GetBytes(filePath);
18             //try
19             //{
20             //    encode = Convert.ToBase64String(bytes);
21             //}
22             //catch
23             //{
24             //    encode = filePath;
25             //}
26             
27            // Response.AddHeader("Content-Disposition", String.Format("attachment;filename=" + fileName));
28            // Response.AppendHeader("Content-Length", fl.Length.ToString());
29             //Response.ContentEncoding = System.Text.Encoding.Default;
30             //Response.ContentType = "application/octet-stream";
31 
32             //Response.WriteFile(filePath);
33             //Response.Redirect("thunder://" + encode);
34            
35             Response.BinaryWrite(bytes);
36             Response.Flush();
37             Response.End();