WebClient访问webSerivce

WebClient访问webService
        static void Main(string[] args)
        {
            string uri = @"http://localhost:2645/Service1.asmx/HelloWorld1";

            WebClient wc = new WebClient();
            StringBuilder postData = new StringBuilder();
            postData.Append("name=" + "mingyongcheng");
            //下?面?是?utf-8编括?码?
            byte[] sendData = Encoding.GetEncoding("utf-8").GetBytes(postData.ToString());
            wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
            wc.Headers.Add("ContentLength", sendData.Length.ToString());

            byte[] recData = wc.UploadData(uri, "POST", sendData);

            //显?示?返う?回?值μ注痢?意癮编括?码?
            string s = Encoding.GetEncoding("utf-8").GetString(recData);
        }