将JSON.NET JObject转换为JsonResult的异常 [英] Exception converting JSON.NET JObject to JsonResult

问题描述

我有一个JSON.NET JObject，其数据结构如下:

I have a JSON.NET JObject with data structured like this:

{
    "foo" : {
        "bar": "baz"
    }
}

我正尝试将其转换为ASP.NET MVC JsonResult，如下所示:

I'm trying to convert it to a ASP.NET MVC JsonResult as follows:

JObject someData = ...;
JsonResult jsonResult = Json(someData, "application/json", JsonRequestBehavior.AllowGet);

执行此操作时，出现以下异常:

When I do this, I get the following exception:

InvalidOperationException原为 用户代码未处理.无法访问 重视孩子 Newtonsoft.Json.Linq.JValue.

InvalidOperationException was unhandled by user code. Cannot access child value on Newtonsoft.Json.Linq.JValue.

我有一个解决方法，可以迭代JObject的所有属性，然后将它们解析为一个通用对象，如下所示:

I have a workaround, in that I can iterate through all of the properties of the JObject, and parse them into a generic object like so:

JsonResult jsonResult = Json(new { key1 = value1, key2 = value2, ... });

但是，这似乎容易出错，并且像解决该问题的不必要的非通用方式一样.有什么方法可以更有效地执行此操作，希望使用JSON.NET或ASP.NET MVC中的一些内置方法吗?

However, this seems error prone and like an unnecessary non-generic way of solving this problem. Is there any way I can do this more efficiently, hopefully using some built in methods in JSON.NET or ASP.NET MVC?

推荐答案

如果您有JObject，建议您编写自定义

If you have a JObject I would recommend you writing a custom ActionResult which directly serializes this JObject using JSON.NET into the response stream. It is more in the spirit of the MVC pattern:

public ActionResult Foo()
{
    JObject someData = ...;
    return new JSONNetResult(someData);
}

其中:

public class JSONNetResult: ActionResult
{
    private readonly JObject _data;
    public JSONNetResult(JObject data)
    {
        _data = data;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        var response = context.HttpContext.Response;
        response.ContentType = "application/json";
        response.Write(_data.ToString(Newtonsoft.Json.Formatting.None));
    }
}

拥有一个JObject似乎是过大的选择，您可以使用.NET JavaScriptSerializer将该序列化为JSON，该JavaScript更常与某些模型类结合使用.

It seems like an overkill to have a JObject which you would serialize into JSON using the .NET JavaScriptSerializer which is more commonly used in conjunction with some model classes.

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