字符串的长度超过了maxJsonLength属性上设置的值。在MVC3中

MVC3（.cshtml文件）

在服务器端

 public JsonResult ZoneType_SelectedState(int x_Id, int y_Id)
    {
    JsonResult result = new JsonResult();
     result.Data = "LongString";//Longstring with the length mention below
    return Json(result.Data,"application/json", JsonRequestBehavior.AllowGet);
    }

我从服务器端传递长度为1194812的字符串，长度大于1194812。 但我得到的错误是说

"Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property."

---

请帮助我解决ASP

您可以编写自定义ActionResult，它将允许您指定序列化程序可以处理的最大数据长度：

public class MyJsonResult : ActionResult
{
    private readonly object data;
    public MyJsonResult(object data)
    {
        this.data = data;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        var response = context.RequestContext.HttpContext.Response;
        response.ContentType = "application/json";
        var serializer = new JavaScriptSerializer();
        // You could set the MaxJsonLength to the desired size - 10MB in this example
        serializer.MaxJsonLength = 10 * 1024 * 1024;
        response.Write(serializer.Serialize(this.data));
    }
}

然后使用它：

public ActionResult ZoneType_SelectedState(int x_Id, int y_Id)
{
    string data = "LongString";//Longstring with the length mention below;
    return new MyJsonResult(data);
}

---

尝试更新您的

控制器
方法，如下所示：

public JsonResult ZoneType_SelectedState(int x_Id, int y_Id)
{
    var result = Json("LongString", JsonRequestBehavior.AllowGet);
    result.MaxJsonLength = int.MaxValue;
    return result;
}

希望这有助于

public JsonResult ZoneType_SelectedState(int x_Id, int y_Id)
{
    var result = Json("LongString", JsonRequestBehavior.AllowGet);
    result.MaxJsonLength = int.MaxValue;
    return result;
}