/// <summary>

/// POST请求与获取结果

/// </summary>

public static string HttpPost(string Url, string postDataStr)

{

         //把数组转换成流中所需字节数组类型

            Encoding code = Encoding.GetEncoding("utf-8");

            byte[] bytesRequestData = code.GetBytes(postDataStr);

            //设置HttpWebRequest基本信息

            HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(Url);

            myReq.Method = "post";

            myReq.ContentType = "application/x-www-form-urlencoded";

            //填充POST数据

            myReq.ContentLength = bytesRequestData.Length;

            Stream requestStream = myReq.GetRequestStream();

            requestStream.Write(bytesRequestData, , bytesRequestData.Length);

            requestStream.Close();

            //发送POST数据请求服务器

            HttpWebResponse HttpWResp = (HttpWebResponse)myReq.GetResponse();

            //接收对应的流

            StreamReader reader = new StreamReader(HttpWResp.GetResponseStream());

            string retString = reader.ReadToEnd();

    return retString;

}

            var result = HttpPost(sendUrl, "id=1&text=" + "这是音频内容");