.net下载文件的方法

/// <summary>
       ///字符流下载方法
       /// </summary>
       /// <param name="fileName">下载文件生成的名称</param>
       /// <param name="fPath">下载文件路径</param>
       /// <returns></returns>
        public void DownloadFile(string fileName, string fPath)
        {
            string filePath = Server.MapPath(fPath);//路径
            //以字符流的形式下载文件
            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();
        }