Json.Net：使用SelectToken让不知道的元素名称的价值呢？ [英] Json.Net: Using SelectToken to get a value without knowing an element name?

问题描述

我有我需要得到令牌的价值，我已经使用SelectToken尝试一个简单的JSON文件，但问题是，元素的名称是动态的。这是我的JSON文件

I have a simple JSON file which i need to get the value of a token, i have tried using SelectToken but the problem is that the name of the elements are dynamic. Here is my JSON file

{
    "name": "testdata",
    "items": {
        "myItemName": {
            "located": true
        }
    }
}

我需要的位置（上图）的价值，如果你看到的元素名称myItemName，这是动态的，不是固定不变的。所以，我没有尝试使用SelectToken的点符号。

I need to get the value of "located" (above), If you see the element name "myItemName", this is dynamic and not fixed. So I did try using the dot notation of SelectToken.

我想出了类似的话，但没有奏效 - 问题是，[0]

I came up with something like so, but it didn't work - problem is the [0]

        bool located = (bool)jsonObject.SelectToken("items.[0].located");

内的项目，可以有多于1动态元件，因此，例如，这是有效的。

Within Items, there can be more than 1 dynamic element, so for example, this is valid.

  {
        "name": "testdata",
        "items": {
            "myItemName": {
                "located": true
            },
            "myOtherItemName": {
                "located": true
            }
        }
    }

所以看上面，你可以看到我有myItemName和myOtherItemName，我想使用的foreach somekind的取得每一个定位的值

So looking above, you can see I have "myItemName" and "myOtherItemName", I would like to get the values of "located" in each one using somekind of foreach

这是在所有可能的？使用SelectToken？

Is this at all possible ? Using SelectToken?

感谢

推荐答案

试试这个：

string json = @"
{
    ""name"": ""testdata"",
    ""items"": {
        ""myItemName"": {
            ""located"": true
        },
        ""myOtherItemName"": {
            ""located"": true
        }
    }
}";

JObject jsonObject = JObject.Parse(json);

foreach (JProperty prop in jsonObject.SelectToken("items"))
{
    string name = prop.Name;
    bool value = (bool)prop.Value.SelectToken("located");
    Console.WriteLine(name + " = " + value);
}

输出：

myItemName = True
myOtherItemName = True

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