asp.net下载的方法

public void DownLoad( ){     string filePath = Server.MapPath( @"\UserFile\" );//这里注意了,你得指明要下载文件的路径.

     if ( System.IO.File.Exists( filePath ) )     {          FileInfo file = new FileInfo( filePath );          Response.ContentEncoding = System.Text.Encoding.GetEncoding( "UTF-8" ); //解决中文乱码      Response.AddHeader( "Content-Disposition", "attachment; filename=" + Server.UrlEncode( file.Name ) ); //解决中文文件名乱码          Response.AddHeader( "Content-length", file.Length.ToString() );          Response.ContentType = "appliction/octet-stream";          Response.WriteFile( file.FullName );          Response.End();          }}