WebApi 简单使用 JObject，可以省掉自定义的class类

post提交的json数据：{"name":"Jason", "age":18, "color":"blue"}

     
   [HttpPost("testpost")]
        public string TestPost([FromBody] Object input)
        {
            var newobj = JObject.FromObject(input);
            newobj.Add(new JProperty("qq", "qqai"));

            string v_name = newobj["name"]?.ToString();
            var v_age = newobj.GetValue("age");
            string v_color = newobj.Property("color")?.Value.ToString();
            var getqkey = newobj.GetValue("qq").ToString();

            return $"name:{v_name},age:{v_age},color:{v_color},qq:{getqkey}";
        }

显示：name:,age:,color:,qq:qqai