Asp.Net下载文件到客户端

        /**//// <summary>
        /// To download a file using Response.WriteFile(string filename)
        /// </summary>
        /// <param name="path"></param>
        public static void Download(string path)
        {
            try
            {
                if(path!=null)
                {
                    FileInfo fi = new FileInfo(path);

                    HttpContext.Current.Response.Clear();

                    // //当要下载的文件名是中文时,需加上HttpUtility.UrlEncode
                    HttpContext.Current.Response.AddHeader("Content-Disposition","attachment;filename=" + HttpUtility.UrlEncode(fi.Name));
                    HttpContext.Current.Response.AddHeader("Content-Length",fi.Length.ToString());
                    HttpContext.Current.Response.ContentType="application/octet-stream";
                    HttpContext.Current.Response.WriteFile(fi.FullName);
                    HttpContext.Current.Response.End();
                }
                else
                {
                    CommonFunction.MessageBox("File Does not exist!");
                }
            }
            catch(Exception _ex)
            {
                throw _ex;
            }
        }