Question

我有以下json：

var x = [
    [99,"abc","2dp",{"Group": 0,"Total":[4, 1]}],
    [7,"x","date"],
    [60,"x","1dp",{"Group": 1}],
    ...
]

我需要对这个json进行反序列化，但我在字段3中遇到了对象的问题。这是第一次尝试：

string x = "[[99,\"abc\",\"2dp\",{\"Group\": 0,\"Total\":[4, 1]}],[7,\"x\",\"date\"],[60,\"x\",\"1dp\",{\"Group\": 1}]]";
List<List<object>> xobj = JsonConvert.DeserializeObject<List<List<object>>>(x);

这似乎有效。在Visual Studio 2015中使用中间窗口：

xobj[0][0];
99

xobj[1][2];
"date"

但是我不确定如何访问字段3中的对象？

xobj[0][3];
{{
  "Group": 0,
  "Total": [
    4,
    1
  ]
}}
    ChildrenTokens: Count = 2
    Count: 2
    First: {"Group": 0}
    HasValues: true
    Last: {"Total": [
  4,
  1
]}
    Next: null
    Parent: null
    Path: ""
    Previous: null
    Root: {{
  "Group": 0,
  "Total": [
    4,
    1
  ]
}}
    Type: Object
    Results View: Expanding the Results View will enumerate the IEnumerable
    Dynamic View: Expanding the Dynamic View will get the dynamic members for the object

xobj[0][3].Root["Group"];
error CS1061: 'object' does not contain a definition for 'Root' and no extension method 'Root' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

我注意到它有一个＆＃39; First＆＃39;方法，所以我试过这个，但也没有运气：

xobj[0][3][0];
error CS0021: Cannot apply indexing with [] to an expression of type 'object'

那么如何访问每个列表对象中的值呢？

Answer 1

如果您只想访问可选条目，请尝试以下方法：

    static void Main(string[] args)
    {
        string x = "[[99,\"abc\",\"2dp\",{\"Group\": 0,\"Total\":[4, 1]}],[7,\"x\",\"date\"],[60,\"x\",\"1dp\",{\"Group\": 1}]]";
        List<List<object>> xobj = JsonConvert.DeserializeObject<List<List<object>>>(x);

        for (int i = 0; i < xobj.Count; i++)
        {
            // Do something with index 0 to 3
            if (xobj[i].Count == 4)
            {
                // I have the optional entry with Group & Total properties
                dynamic opt = xobj[i][3];
                Console.WriteLine("GROUP: " + opt.Group); // Mandatory
                Console.WriteLine("GROUP value: " + opt.Group.Value);

                if (opt["Total"] != null)
                {
                    Console.WriteLine("TOTAL: " + opt.Total);
                    Console.WriteLine("TOTAL item 0 value: " + opt.Total[0].Value);
                    Console.WriteLine("TOTAL item 1 value: " + opt.Total[1].Value);
                }
            }
        }

        Console.ReadLine();
    }

JSON.net访问包含多种类型（包括对象）的反序列化列表的值

1 个答案: