在MVC 4中增加json响应maxJsonLength

Question

我在razor视图引擎MVC4(.net 4.5)应用程序中加载大型JSON响应表单服务器时出现以下错误

" 使用JSON JavaScriptSerializer进行序列化或反序列化时出错.字符串的长度超过了@ Html.Raw(Json.Encode(jsondata)上的maxJsonLength属性上设置的值 "

我试过在我的web.config中设置MaxJsonLength属性:

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

在发送JSON响应的同时在服务器端尝试跟随.

 return new JsonResult()
    {
        Data = data,
        ContentType = contentType,
        ContentEncoding = contentEncoding,
        JsonRequestBehavior = behavior,
        MaxJsonLength = Int32.MaxValue
    };

还尝试了列出的解决方案:http://brianreiter.org/2011/01/03/custom-jsonresult-class-for-asp-net-mvc-to-avoid-maxjsonlength-exceeded-exception/.但没有什么对我有用:(

有人可以建议我如何避免这个错误或如何增加杰森响应最大长度？

Answer 1

不知何故,我通过在视图中使用以下代码摆脱了这个错误.

@{
System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue;
}
<script type="text/javascript">
var entries = @Html.Raw(serializer.Serialize(Model.FeedEntries));    
</script>

至少对我来说,这不是在服务器端工作.

Answer 2

我的便士解决方案.b)因为a)在Mvc 4.5 AFAIK中给出了错误消息'System.Web.Mvc.JsonResult不包含maxJsonLength ...的定义',这是唯一有效的解决方法.

我把b)放在我的控制器里.希望这会对某人有所帮助.

此致,SM

一个)

var jsonResult = Json(list, JsonRequestBehavior.AllowGet);
jsonResult.maxJsonLength = int.MaxValue;
return jsonResult;

b)

if (Request.IsAjaxRequest())
{
   //Working solution
   var serializer = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue, RecursionLimit = 100 };

   return new ContentResult()
   {
      Content = serializer.Serialize(list),
      ContentType = "application/json",
   };

   //Trial 2
   //var jsonResult = Json(list, JsonRequestBehavior.AllowGet);
   //jsonResult.maxJsonLength = int.MaxValue;
   //return jsonResult;

   //Trial 1
   //return Json(list, JsonRequestBehavior.AllowGet);
}