美しいミズキ

1
// 定义数据
2
public class Item
3
{
4
    // Json 注解
5
    [JsonPropertyName("user_name")]
6
    public string Name { get; set; }
7

8
    [JsonPropertyName("age")]
9
    public int Age { get; set; }
10

11
    [JsonPropertyName("using_skills")] // JSON 里为 using_skills
12
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] // 条件忽略, 为Null忽略
13
    public List<string>? Skills { get; set; }
14
}
15

16
public static void Main(string[] args)
17
{
18
    string path = @"C:\Projects\C#\ConsoleTest\ConsoleTest";
19

20
    var item = new Item
21
    {
22
        Name = "ZhangSan",
23
        Age = 24,
24
        Skills = new List<string> { "CSharp", "XAML" }
25
    };
26

27
    var items = new List<Item>
28
    {
29
        item,
30
        new Item
31
        {
32
            Name = "ZhangSan",
33
            Age = 24,
34
            Skills = null,
35
        }
36
    };
37

38
    var options = new JsonSerializerOptions
39
    {
40
        WriteIndented = true // 配置缩进
41
    };
42

43
    // 转为json字符串
44
    string json = JsonSerializer.Serialize(items, options);
45

46
    // 写入
47
    File.WriteAllText(Path.Combine(path, "demo.json"), json);
48

49
    // 读取json文件,反序列化
50
    json = File.ReadAllText(Path.Combine(path, "demo.json"));
51
    List<Item>? newItem = JsonSerializer.Deserialize<List<Item>>(json);
52
    if (newItem == null) { return; }
53

54
    foreach (var itm in newItem)
55
    {
56
        Console.WriteLine(itm.Name);
57
        Console.WriteLine(itm.Age);
58
        Console.WriteLine(itm.Skills);
59
    }
60
}