服务器端接受Json数据的绑定实现

 public ActionResult GetData([JsonRead(typeof(PostData))]PostData postData)

public class JsonReadAttribute : CustomModelBinderAttribute
    {
        private Type type;
        public JsonReadAttribute(Type type)
        {
            this.type = type;
        }
        public override IModelBinder GetBinder()
        {
            return new JsonReadModelBinder(type);
        }
    }

public class JsonReadModelBinder : IModelBinder
    {
        private Type type;
        public JsonReadModelBinder(Type type)
        {
            this.type = type;
        }

        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            var request = controllerContext.HttpContext.Request;
            request.InputStream.Position = 0;
            var objs = new object();
            using (var s = new GZipStream(request.InputStream, CompressionMode.Decompress))
            {
                using (var sReader = new StreamReader(s, Encoding.UTF8))
                {
                    string str = sReader.ReadToEnd();
                    if (type == typeof(PostData))
                    {
                        objs = JsonUnit.Deserialize<PostData>(str);
                    }else if (type == typeof(PostComment))
                    {
                        objs = JsonUnit.Deserialize<PostComment>(str);
                    }//if else 扩展
                    sReader.Close();
                }
              }
            return objs;
        }