MVC JsonResult 结果返回

使用MVC之后, 默认的ActionResult 有很多子类譬如 JsonResult之类, 可以很方便. 基本用法如下:

        public ActionResult GetVacation()
        {
            var dt = ...(省略);
            if (dt == null || dt.Rows.Count==0) return Json(new { success = false, msg = "相应空逻辑！" }); ;
            return Json(new { 
                success = true,
                ...(省略)
            });//省略内容
        }

默认只能采用POST方式调用方法, Get 不行, 需要构建 JsonRequestBehavior 为AllowGet 方式. 返回 response.

        public JsonResult W1ArchiveOTUpdate(string xxx1, string xxx2)
        {
            JsonResult response = new JsonResult() { JsonRequestBehavior = JsonRequestBehavior.AllowGet };
            var ret = Biz.XXX(Request.Cookies["XXX"].Value);
            response.Data = new { success = ret.Success, msg = ret.Msg };
            return response;
        }

另一种情况, 返回数据行过多, 数据超过了默认限定, 记不清多少了, 所以采用了一个JsonResult 子类来定义到int.MAX. 如果还不行, 请考虑业务问题, 能分页就分页把.

过度方案:

    public class LargeJsonResult : JsonResult
    {
        const string JsonRequest_GetNotAllowed = "This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.";
        public LargeJsonResult()
        {
            MaxJsonLength = int.MaxValue;//102400;
            RecursionLimit = 100;
        }

        public new int MaxJsonLength { get; set; }
        public new int RecursionLimit { get; set; }

        public override void ExecuteResult(ControllerContext context)
        {
            if (context == null)
            {
                throw new ArgumentNullException("context");
            }
            if (JsonRequestBehavior == JsonRequestBehavior.DenyGet &&
                String.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase))
            {
                throw new InvalidOperationException(JsonRequest_GetNotAllowed);
            }

            HttpResponseBase response = context.HttpContext.Response;

            if (!String.IsNullOrEmpty(ContentType))
            {
                response.ContentType = ContentType;
            }
            else
            {
                response.ContentType = "application/json";
            }
            if (ContentEncoding != null)
            {
                response.ContentEncoding = ContentEncoding;
            }
            if (Data != null)
            {
                JavaScriptSerializer serializer = new JavaScriptSerializer() { MaxJsonLength = MaxJsonLength, RecursionLimit = RecursionLimit };
                response.Write(serializer.Serialize(Data));
            }
        }
    }
    
    
    //调用方式
         public ActionResult XXXX(string XXX1, string XXX2)
        {
            var ret = Biz.XXX();
            return new LargeJsonResult
            {
                Data = ret.Data
            };
            //return Json(ret);
        }

参考:

http://www.cnblogs.com/lmfeng/p/3596175.html

https://blog.csdn.net/zerorm/article/details/51488152