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发送带参数post请求

请求参数：

封装参数：

1、创建model

ublic class stContent
        {
            public string SendName { get; set; }
            public string SendMobile { get; set; }
        }

2、封装参数并发送请求

public ActionResult GetExpress(string sendname,stirng phone)
{
           stContent sc = new stContent();
            sc.SendName = sendname;
            sc.SendMobile = phone;
           string res = JsonConvert.SerializeObject(sc);//转成json数据
           GetST(res);发送请求
}

public string GetST(string data)
{
    Dictionary<string, string> stu = new Dictionary<string, string>();
     stu.Add("content", data);
     stu.Add("data_digest", data_digest);
     stu.Add("api_name", api_name);
     stu.Add("from_appkey", st_from_appkey);
      stu.Add("from_code", st_from_code);
      stu.Add("to_appkey", st_to_appkey);
      stu.Add("to_code", st_to_code);
      string res = stPost(url, stu);
}

　　3、post请求

public static string stPost(string url, Dictionary<string, string> dic)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            #region 添加Post 参数
            StringBuilder builder = new StringBuilder();
            int i = 0;
            foreach (var item in dic)
            {
                if (i > 0)
                    builder.Append("&");
                builder.AppendFormat("{0}={1}", item.Key, item.Value);
                i++;
            }
            byte[] data = Encoding.UTF8.GetBytes(builder.ToString());
            req.ContentLength = data.Length;
            using (Stream reqStream = req.GetRequestStream())
            {
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();
            }
            #endregion
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            //获取响应内容
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }