C# xmlhttp

 //引入com microsoft.xml.3.0
    //using MSXML2;
    public void GetCon(String Url)
    {
    //    string vs = "";
    //    try
    //    {
    //        ArrayList arr = new ArrayList();
    //        XMLHTTP XmlHttp = new MSXML2.XMLHTTPClass();            ;

    //        XmlHttp.open("get", url,false, null, null);
    //        XmlHttp.send(null);

    //        if (XmlHttp.readyState == 4)
    //        {
    //            vs = XmlHttp.responseText;
    //        }
    //    }
    //    catch { }
    //    return vs;

        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='" + Request.ApplicationPath + StringFileName + "' target='_blank'>");
            Response.Write("查看" + StringFileName + "</a>");
        }
        else
            Response.Write(_xmlhttp.statusText);
        Response.End();

   }