Question

我反序列化由serialize方法创建的json字符串。 JSON（来自Newtonsoft库）看起来像这样（有点格式化以便更好地阅读）：

{"AreaKindList":
[
    {"ID":1,"Kind":"Lioncage"},
    {"ID":2,"Kind":"Open-Air Enclosure"}
],
"AnimalRaceList":
[
    {"ID":1,"Race":"Lion","AllowedAreaKinds":[1]},
    {"ID":2,"Race":"Gazelle","AllowedAreaKinds":[2]},
    {"ID":3,"Race":"Antelope","AllowedAreaKinds":[2]}
],
"AreaList":
[
    {"ID":1,"AreaKindId":1,"Size":2,"AnimalList":
                                    [
                                        {"Name":"Leo","RaceId":1}
                                    ]
    }
]}

这些课程看起来像这样：

public class Zoo
{
    public List<AreaKind> AreaKindList { get; set; }
    public List<AnimalRace> AnimalRaceList { get; set; }
    public List<Area> AreaList { get; set; }
}

public class AreaKind
{
    public int ID { get; private set; }
    public string Kind { get; private set; }
    public AreaKind(int id, string kind)
    {
        ID = id;
        Kind = kind;
    }
}

public class AnimalRace
{
    public int ID { get; private set; }
    public string Race { get; private set; }
    public List<int> AllowedAreaKinds { get; private set; }
    public AnimalRace (int id, string race, List<int> areaKindIds)
    {
        ID = id;
        Race = race;
        AllowedAreaKinds = areaKindIds;
    }
}

public class Area
{
    public int ID { get; private set; }
    public int AreaKindId { get; set; }
    public int Size { get; set; }
    public List<Animal> AnimalList { get; set; }
    public Area(int size, int areaKindId, int id)
    {
        ID = id;
        AreaKindId = areaKindId;
        Size = size;
    }
}

正如您所看到的，AnimalRaceList中有一个名为AllowedAreaKinds的数字列表。此时内部只有一个条目。当我使用以下代码反序列化zoo-object时，动物园被完全填充（包括ID为1的动物Leo），但是“List AllowedAreaKinds”被完全设置为“NULL”。为什么呢？

using (StreamReader reader = File.OpenText(Program.JsonFile))
{
    JsonSerializer serializer = new JsonSerializer();
    Zoo tempZoo = (Zoo) serializer.Deserialize(reader, typeof(Zoo));
}

我甚至更改了Populate（）的序列化程序，但结果相同。任何人都知道它可能是什么？

列表<object>中的List <int>在反序列化（JSON）时为null

0 个答案: