C# 继承的类和属性未包含在ASP.NET核心API的JSON结果中

我有一个简单的模型，我尝试将其序列化为JSON，但结果中没有包含一些属性。当我的对象从基类继承时，基类的属性不会出现在json中

在JSON字符串中，“searchModel”是{}

SearchModelBase.cs：

public interface ISearchModelBase
{
    SearchTypes Type { get; set; }
    string SearchString { get; set; }
}

public abstract class SearchModelBase : ISearchModelBase
{
    public SearchModelBase(SearchTypes type, string searchString)
    {
        this.Type = type;
        this.SearchString = searchString;
    }

    public SearchTypes Type { get; set; }

    public string SearchString { get; set; }
}

public enum SearchTypes
{
    User,
    Site
}

public interface IAssetsDefaultSearchModel : ISearchModelBase
{

}

public class AssetsDefaultSearchModel : SearchModelBase, IAssetsDefaultSearchModel
{
    public AssetsDefaultSearchModel(SearchTypes type, string searchString) : base(type, searchString) 
    {

    }
}

{
    "items": [
        {
            "displayName": "FFU Samarin",
            "data": {
                "appId": 3,
                "displayName": "FFU Samarin",

                ..........

资产默认搜索模型.cs：

public interface ISearchModelBase
{
    SearchTypes Type { get; set; }
    string SearchString { get; set; }
}

public abstract class SearchModelBase : ISearchModelBase
{
    public SearchModelBase(SearchTypes type, string searchString)
    {
        this.Type = type;
        this.SearchString = searchString;
    }

    public SearchTypes Type { get; set; }

    public string SearchString { get; set; }
}

public enum SearchTypes
{
    User,
    Site
}

public interface IAssetsDefaultSearchModel : ISearchModelBase
{

}

public class AssetsDefaultSearchModel : SearchModelBase, IAssetsDefaultSearchModel
{
    public AssetsDefaultSearchModel(SearchTypes type, string searchString) : base(type, searchString) 
    {

    }
}

{
    "items": [
        {
            "displayName": "FFU Samarin",
            "data": {
                "appId": 3,
                "displayName": "FFU Samarin",

                ..........

JSON：

public interface ISearchModelBase
{
    SearchTypes Type { get; set; }
    string SearchString { get; set; }
}

public abstract class SearchModelBase : ISearchModelBase
{
    public SearchModelBase(SearchTypes type, string searchString)
    {
        this.Type = type;
        this.SearchString = searchString;
    }

    public SearchTypes Type { get; set; }

    public string SearchString { get; set; }
}

public enum SearchTypes
{
    User,
    Site
}

public interface IAssetsDefaultSearchModel : ISearchModelBase
{

}

public class AssetsDefaultSearchModel : SearchModelBase, IAssetsDefaultSearchModel
{
    public AssetsDefaultSearchModel(SearchTypes type, string searchString) : base(type, searchString) 
    {

    }
}

{
    "items": [
        {
            "displayName": "FFU Samarin",
            "data": {
                "appId": 3,
                "displayName": "FFU Samarin",

                ..........

在Visual Studio中，集合中的每个项都包含AssetDefaultSearchModel，两个属性中都有值：

---

在从ISearchResultBase派生的接口中，我必须使用new关键字定义一个新属性。然后，我返回一个从IAssetDefaultSearchResult派生的对象（不复制类中的属性），它按预期工作

public interface IAssetsDefaultSearchResult : ISearchResultBase
{
    new ISearchModelBase SearchModel { get; }

    string DisplayName { get; }

    object Data { get; }

    TagBuilder HtmlTag { get; }
}

---

将以下代码添加到Startup.cs

services.AddControllers().AddNewtonsoftJson();

---

您可以使用NuGet软件包

这是.net-core-3吗？您正在使用哪个序列化库？