C#对实体进行JSON序列化时枚举的处理

Posted 2020-06-13

实体类如下：

public enum ESex
{
    Boy,
    Girl
}

public class Person
{
    public String Name { get; set; }
    public String Address { get; set; }
    public String Age { get; set; }
    public ESex Sex { get; set; }

    public Person() { }

    public Person(String name, String address, String age)
    {
        this.Name = name;
        this.Address = address;
        this.Age = age;
    }
}

View Code

通过Newtonsoft.Json.dll进行序列化如下：

List<Person> list = new List<Person>();
for (int i = 0; i < 2; i++)
{
    Person p = new Person("张三" + i, "重庆" + i, "2" + i);
    p.Sex = ESex.Girl;
    list.Add(p);
}
var result=JsonConvert.SerializeObject(list);

结果为：[{"Name":"张三0","Address":"重庆0","Age":"20","Sex":1},{"Name":"张三1","Address":"重庆1","Age":"21","Sex":1}]

可以看出Sex直接转换成了1，也就是说枚举默认从0开始排序，Girl就表示1，但是如果我们想要得到{"Name":"张三1","Address":"重庆1","Age":"21","Sex":"Girl"}结果怎么办呢？

解决方案：在Sex上面加入JsonConverter说明如下：

public class Person
{
    public String Name { get; set; }
    public String Address { get; set; }
    public String Age { get; set; }
    [JsonConverter(typeof(StringEnumConverter))]
    public ESex Sex { get; set; }

    public Person() { }

    public Person(String name, String address, String age)
    {
        this.Name = name;
        this.Address = address;
        this.Age = age;
    }
}

这样修改后得到的结果如下：
[{"Name":"张三0","Address":"重庆0","Age":"20","Sex":"Girl"},{"Name":"张三1","Address":"重庆1","Age":"21","Sex":"Girl"}]

这样实现后反序列化同样能够成功