WebClient WClient = new WebClient();
            System.Collections.Specialized.NameValueCollection VarPost = new System.Collections.Specialized.NameValueCollection();
            WClient.Encoding = System.Text.Encoding.GetEncoding("GB2312");
            VarPost.Add("test", "4");
            VarPost.Add("webname", "我的网站");//此处乱码
            byte[] RemoteByte = WClient.UploadValues(string.Format("http://{0}/install/index.php", SModel.SiteUrl), "POST", VarPost);