用System.Text.Json序列化有子项和接口的实体类中子项目却缺属性是什么情况？
0
悬赏园豆：5
[待解决问题]
我用的是.Net Core 3.1 C#
实体类的代码是这样的
public class NewsColumnTreeListViewModels : IToTreeModel
{
public int Id { get; set; }
public string Name { get; set; }
public int NewsCount { get; set; }
public int ParentId { get; set; }
public List<IToTreeModel> children { get; set; }
public void AddChilrden(IToTreeModel node)
{
if (children == null)
children = new List<IToTreeModel>();
children.Add(node);
}
}接口：
public interface IToTreeModel
{
int Id { get; set; }
int ParentId { get; set; }
List<IToTreeModel> children { get; set; }
void AddChilrden(IToTreeModel node);
}用JsonSerializer.Serialize(list);序列化后第一层数据是完整的，第二次之后之序列化了接口中的属性，接口没有的属性不会进行序列化。
变成了这样：
[{
"id": 1,
"name": "\u6D4B\u8BD51",
"newsCount": 0,
"parentId": 0,
"children": [{
"id": 5,
"parentId": 1,
"children": [{
"id": 7,
"parentId": 5,
"children": null
}, {
"id": 9,
"parentId": 5,
"children": [{
"id": 10,
"parentId": 9,
"children": null
}, {
"id": 11,
"parentId": 9,
"children": null
}]
}]
}]
}, {
"id": 2,
"name": "\u6D4B\u8BD52",
"newsCount": 0,
"parentId": 0,
"children": [{
"id": 6,
"parentId": 2,
"children": null
}]
}]吧实体类改成这样就没问题了
public class NewsColumnTreeListViewModels
{
public int Id { get; set; }
public string Name { get; set; }
public int NewsCount { get; set; }
public int ParentId { get; set; }
public List<NewsColumnTreeListViewModels> children { get; set; }
public void AddChilrden(NewsColumnTreeListViewModels node)
{
if (children == null)
children = new List<NewsColumnTreeListViewModels>();
children.Add(node);
}
}用的是同一个方法载入的数据，这个方法一开始是泛型的 我只是把泛型去掉了，带接口和不带接口的实体用的都是同一个去掉泛型之后的方法
调试模式确认了，序列化前的数据是完整的（就算不完整也应该是null）
是我写的有问题还是发现了Bug？？？？
问题补充：
复现问题的代码：
public IActionResult Privacy()
{
var data1 = new List<Data1>();
//Data1
var d15 = new Data1() { Id = 5, Name = "NameData1-5", Text = "TextData1-5" };
var d14 = new Data1() { Id = 4, Name = "NameData1-4", Text = "TextData1-4" };
var list11 = new List<IDate>();
list11.Add(d15);
list11.Add(d14);
var d13 = new Data1() { Id = 3, Name = "NameData1-3", Text = "TextData1-3", children = list11 };
var list12 = new List<IDate>();
list12.Add(d13);
var d12 = new Data1() { Id = 2, Name = "NameData1-2", Text = "TextData1-2", children = list12 };
var d11 = new Data1() { Id = 1, Name = "NameData1-1", Text = "TextData1-1" };
data1.Add(d11);
data1.Add(d12);
//Data2
var data2 = new List<Data2>();
var d25 = new Data2() { Id = 5, Name = "NameData2-5", Text = "TextData2-5" };
var d24 = new Data2() { Id = 4, Name = "NameData2-4", Text = "TextData2-4" };
var list21 = new List<Data2>();
list21.Add(d25);
list21.Add(d24);
var d23 = new Data2() { Id = 3, Name = "NameData2-3", Text = "TextData2-3", children = list21 };
var list22 = new List<Data2>();
list22.Add(d23);
var d22 = new Data2() { Id = 2, Name = "NameData2-2", Text = "TextData2-2", children = list22 };
var d21 = new Data2() { Id = 1, Name = "NameData2-1", Text = "TextData2-1" };
data2.Add(d21);
data2.Add(d22);
string s1 = System.Text.Json.JsonSerializer.Serialize(data1);
string s2 = System.Text.Json.JsonSerializer.Serialize(data2);
ViewBag.s1 = s1;
ViewBag.s2 = s2;
return View();
}实体类：
····
public class Data1 : IDate
{
public int Id { get; set; }
public string Name { get; set; }
public List<IDate> children { get; set; }
public string Text { get; set; }
}
public interface IDate
{
public int Id { get; set; }
public string Name { get; set; }
public List<IDate> children { get; set; }
}
public class Data2
{
public int Id { get; set; }
public string Name { get; set; }
public List<Data2> children { get; set; }
public string Text { get; set; }
}····
最后结果：
S1=
····
[{"Id":1,"Name":"NameData1-1","children":null,"Text":"TextData1-1"},{"Id":2,"Name":"NameData1-2","children":[{"Id":3,"Name":"NameData1-3","children":[{"Id":5,"Name":"NameData1-5","children":null},{"Id":4,"Name":"NameData1-4","children":null}]}],"Text":"TextData1-2"}]
····
S2=
····
[{"Id":1,"Name":"NameData2-1","children":null,"Text":"TextData2-1"},{"Id":2,"Name":"NameData2-2","children":[{"Id":3,"Name":"NameData2-3","children":[{"Id":5,"Name":"NameData2-5","children":null,"Text":"TextData2-5"},{"Id":4,"Name":"NameData2-4","children":null,"Text":"TextData2-4"}],"Text":"TextData2-3"}],"Text":"TextData2-2"}]
····
为了便于回答者调试，建议提供重现问题的示例代码
– dudu 4年前@dudu: 补上了~
– 随缘py 4年前