//定义参数  C#调取webapi

         var content = new FormUrlEncodedContent(new Dictionary<string, string>()

          {

           {"Id",Guid.Empty.ToString()},

           {"data",DateTime.Now.ToString("yyyy-MM-dd") },

           {"new_visitor",""},

           {"new_visitor_percent","20.00%"},

           {"old_visitor",""},

           {"old_visitor_percent","30.00%"},

           {"orgid","5e436943-2e51-4d34-baab-762cf58b2ac7"},

           });

           result = RequestAPI(content, "api/SiteService/GetSaveCtrUserCompare");

  public string RequestAPI(FormUrlEncodedContent content, string strmethod)

        {

            //提交当前地址的webapi

            //string apiUrl = ConfigurationManager.AppSettings["SSOPassport"];

            string apiUrl = "http://xxx.xxx.xx.xxx:8077/";

            //向用户中心提交部门

            //后台client方式GET提交

            HttpClient myHttpClient = new HttpClient();

            myHttpClient.BaseAddress = new Uri(apiUrl);

            HttpResponseMessage response = myHttpClient.PostAsync(strmethod, content).Result;

            string result = "";

            if (response.IsSuccessStatusCode)

            {

                result = response.Content.ReadAsStringAsync().Result;

            }

            //将json字符串转化为对应的格式

            JObject jsonObj = JObject.Parse(result);

            string dataStr = string.Empty;

            if (jsonObj.Property("Result") != null && jsonObj["Result"] != null && !string.IsNullOrEmpty(jsonObj["Result"].ToString()))

            {

                dataStr = jsonObj["Result"].ToString();

            }

            return dataStr;

        }