Question

我只是想将一些逗号分隔的数字移到前端：

[AcceptVerbs(HttpVerbs.Get)]
public JsonResult GetSquares()
{
 var result = new JsonResult();
 result.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
IList<double> list = new List<double>();
...
result.Data = list;
return result;
}

只要只有少数数字，这个工作正常。不幸的是，我偶尔会移动很多数字并获得MaxJsonLength异常。我尝试了几个建议来克服这个问题（在web.config文件中添加一些内容等）。也许我毕竟不必使用JSON？但是我仍然需要使用javascript对数字做些什么。我现在正在使用jquery的ajax。

欢迎任何建议......

Answer 1

Here is another custom JsonResult (CorrectJsonResult)处理JavascriptConverter允许的默认4MB的较大序列化限制。

And another example which uses ContentResult代替JsonResult子类。

public ActionResult GetLargeJsonResult()
{
  return new ContentResult
  {
    Content = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue }.Serialize(myBigdata),
    ContentType = "application/json"
  };
}

Answer 2

我扩展了基类Controller并且运行得很好：

ControllerExtensions类：

namespace SCAWEB.Helpers
{
    public static class ControllerExtensions
    {
        #region Json
        public static int MaxJsonLength{get;set;}

        static ControllerExtensions()
        {
            MaxJsonLength = 2147483644;
        }

        public static System.Web.Mvc.JsonResult LargeJson(this System.Web.Mvc.Controller controlador, object data)
        {
            return new System.Web.Mvc.JsonResult()
            {
                Data = data,
                MaxJsonLength = MaxJsonLength,
            };
        }
        public static System.Web.Mvc.JsonResult LargeJson(this System.Web.Mvc.Controller controlador, object data, System.Web.Mvc.JsonRequestBehavior behavior)
        {
            return new System.Web.Mvc.JsonResult()
            {
                Data = data,
                JsonRequestBehavior = behavior,
                MaxJsonLength = MaxJsonLength
            };
        }
        //TODO: You can add more overloads, the controller class has 6 overloads
        #endregion
    }
}

MyController类：

using SCAWEB.Helpers;

namespace SCAWEB.Controllers
{
    public class VentasController : Controller
    {
        public ActionResult VentasList (){
            //Todo: All the action code

            //return this.Json(myData);
            return this.LargeJson(myData);//Here I use my extensions
        }
    }
}

您可以在代码中指定最大长度：

ControllerExtensions.MaxJsonLength = 1073741824;//1GB

Answer 3

请参阅explainination和LargeJsonResult类 http://brianreiter.org/2011/01/03/custom-jsonresult-class-for-asp-net-mvc-to-avoid-maxjsonlength-exceeded-exception/

Answer 4

这不起作用？

<configuration> 
   <system.web.extensions>
       <scripting>
           <webServices>
               <jsonSerialization maxJsonLength="2147483644"/>
           </webServices>
       </scripting>
   </system.web.extensions>
</configuration>

如果没有，也许你可以把它作为一个字符串传回来......

[AcceptVerbs(HttpVerbs.Get)]
public ActionResult GetSquares()
{
    IList<double> list = new List<double>();
    ....
    return Content(string.Join(",", list));
}

JSON，ASP.NET MVC - MaxJsonLength异常

4 个答案: