public void GetDown(String Url)        {            string StringFileName = Url.Substring(Url.LastIndexOf("/") + 1);            string StringFilePath = Request.PhysicalApplicationPath;            if (!StringFilePath.EndsWith("/")) StringFilePath += "/";            MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();            _xmlhttp.open("GET", Url, false, null, null);            _xmlhttp.send("");            if (_xmlhttp.readyState == 4)            {                if (System.IO.File.Exists(StringFilePath + StringFileName))                    System.IO.File.Delete(StringFilePath + StringFileName);                System.IO.FileStream fs = new System.IO.FileStream(StringFilePath + StringFileName, System.IO.FileMode.CreateNew);                System.IO.BinaryWriter w = new System.IO.BinaryWriter(fs);                w.Write((byte[])_xmlhttp.responseBody);                w.Close();                fs.Close();                Response.Write("文件已经得到。<br><a href=http://www.mamicode.com/‘" + Request.ApplicationPath + StringFileName + "‘ target=‘_blank‘>");                Response.Write("查看" + StringFileName + "</a>");            }            else                Response.Write(_xmlhttp.statusText);            Response.End();