c# - 反序列化List Json C#中的List

Question

我有 JSON 格式的问题列表。他们每个人都包含答案列表。当我反序列化它时，答案列表不会反序列化。我只是收到空答案列表的问题。我该如何解决这个问题？

我的反序列化

List<QuestionTxt> myDeserializedObjList = (List<QuestionTxt>)Newtonsoft.Json.JsonConvert.DeserializeObject(File.ReadAllText(@"d:\test.txt"), typeof(List<QuestionTxt>));

JSON

[
    {
        "answers": [
            {
                "answer": "1",
                "text": "First"
            },
            {
                "answer": "Second",
                "text": "2"
            }
        ],
        "cost": 1.0,
        "count": 2,
        "image": false,
        "imagePath": null,
        "name": "Numbers",
        "about": "Numbers",
        "solve": false,
        "type": "Сonformity",
        "Id": "cnf0"
    },
    {
        "answers": [
            {
                "answer": "+",
                "text": "One"
            },
            {
                "answer": "-",
                "text": "Two"
            }
        ],
        "cost": 1.0,
        "count": 2,
        "image": false,
        "imagePath": null,
        "name": "Numbers 2",
        "about": "Numbers 2",
        "solve": false,
        "type": "One",
        "Id": "rdb0"
    }
]

问题文本

回答

class Answer
{
    private string text_;
    private string answer_;

    public Answer(string text, string answer)
    {
        this.text = text;
        this.answer = answer;
    }

    public string answer { get => answer_; set => answer_ = value; }
    public string text { get => text_; set => text_ = value; }
}

Answer 1

属性QuestionTxt.answers 应该是public(你有internal)

public class QuestionTxt
{
    public List<Answer> answers { get; set; }  // notice public!
    public string name { get; set; }

    public QuestionTxt()
    {
        answers = new List<Answer>();
    }
}

或者，如果您希望将其保留在内部 - 使用JsonPropertyAttribute

public class QuestionTxt
{
    [JsonProperty()]
    internal List<Answer> answers { get; set; }  // notice internal!
    public string name { get; set; }

    public Question()
    {
        answers = new List<Answer>();
    }
}

当然，所有你想要反序列化的类都应该有无参数的构造函数。

作为 JsonPropertyAttribute 的通知，您可以自由地遵循 .Net 属性名称约定，而不会违反 json 约定

public class QuestionTxt
{
    [JsonProperty("answers")]
    public List<Answer> Answers { get; set; }

    [JsonProperty("name")]
    public string Name{ get; set; }

    public Question()
    {
        Answers = new List<Answer>();
    }
}

public class Answer
{
    [JsonProperty("answer")]
    public string Value { get; set; }

    [JsonProperty("text")]
    public string Text { get; set; }
}