使用 Data POST POST 方法调用 Web 服务

        /// <summary>
    /// Post Method with input parameter
    /// </summary>
    /// <returns> Json formated data </returns>
    public string GetJsonData2()
    {
        IOperations _Obj = ClsOperations.GetOperations();
        string url = "http://1.2.3.4:1234/Services/rest/CallService/WebRequest/";
        Dictionary<string, object> objDec = new Dictionary<string, object>();
        objDec.Add("@FirstParameter", "Value1");
        objDec.Add("@SecondParameter", "Value2");
        objDec.Add("@ThirdParameter", "Value3");
        string jsonResult = _Obj.GetJsonResult(url, objDec);
        return jsonResult;
    }