在ASP中无法将json反序列化为抽象类.净MVC

我知道关于这个问题有很多问题和答案，但是没有一个对我有帮助。

我有两个继承自一个抽象基类的类。我试图在我的控制器中编写POST方法，获得基类作为参数，但我得到异常:

MissingMethodException: Cannot create an abstract class.

我在这个答案中找到了解决方案:在Asp中反序列化Json到派生类型。. Net Web API，但是没有帮助。

我喜欢这个想法，并按照答案一直到最后，但仍然得到了相同的异常，我的代码从未被调用过。

为了隔离这个问题，我已经启动了新的ASP。. NET项目(SPA模板)并检查了我在清洁项目上的问题。我的实现:

我的JsonConverter实现与答案的一个形式相同:

public abstract class JsonCreationConverter<T> : JsonConverter
{
    /// <summary>
    /// this is very important, otherwise serialization breaks!
    /// </summary>
    public override bool CanWrite => false;
    /// <summary> 
    /// Create an instance of objectType, based properties in the JSON object 
    /// </summary> 
    /// <param name="objectType">type of object expected</param> 
    /// <param name="jObject">contents of JSON object that will be 
    /// deserialized</param> 
    /// <returns></returns> 
    protected abstract T Create(Type objectType, JObject jObject);
    public override bool CanConvert(Type objectType)
    {
        return typeof(T).IsAssignableFrom(objectType);
    }
    public override object ReadJson(JsonReader reader, Type objectType,
      object existingValue, JsonSerializer serializer)
    {
        //////////////////////////////////////////
        // This function never get called!!!!!!!!!
        //////////////////////////////////////////
        if (reader.TokenType == JsonToken.Null)
            return null;
        // Load JObject from stream 
        JObject jObject = JObject.Load(reader);
        // Create target object based on JObject 
        T target = Create(objectType, jObject);
        // Populate the object properties 
        serializer.Populate(jObject.CreateReader(), target);
        return target;
    }
    public override void WriteJson(JsonWriter writer, object value,
      JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

我的基类及其实现是:

[JsonConverter(typeof(MyCustomConverter))]
public abstract class BaseClass
{
    private class MyCustomConverter : JsonCreationConverter<BaseClass>
    {
        protected override BaseClass Create(Type objectType,
          Newtonsoft.Json.Linq.JObject jObject)
        {
        //////////////////////////////////////////
        // No matter what I put in here.
        // This function never get called!!!!!!!!!
        //////////////////////////////////////////
            return new Sub1()
            {
                Name = "aaaa",
                Prop1 = 233
            };
        }
    }
    public int Prop1 { get; set; }
}
public class Sub1 : BaseClass
{
    public string Name { get; set; }
}

我的控制器Post和Get方法是:

    // GET: /Account/GetTest
    [HttpGet]
    public JsonResult GetTest()
    {
        // This function works as expected.
        Sub1 sub1 = new Sub1
        {
            Name = "SomeName",
            Prop1 = 5
        };
        return Json(sub1, JsonRequestBehavior.AllowGet);
    }
    // Post: /Account/PostTest
    [HttpPost]
    public JsonResult PostTest(BaseClass res)
    {
        // I never get to this point.
        return Json(res, JsonRequestBehavior.AllowGet);
    }

和我的JS测试代码，试图使用这个api是:

$.ajax({
    url: '/Account/GetTest',
    method: 'get',
    cache: false,
    success: function(data) {
        // data arrive fine to this point        
        $.ajax({
            url: '/Account/PostTest',
            method: 'post',
            cache: false,
            data: data,
            // I've also tried: data: JSON.stringify(data),
            success: function () {
                // I never get success...
                alert('Success');
            },
            error: function () {
                alert('Error Post');
            }
        });
    },
    error: function() {
        alert('Error Get');
    }
});

我也试着玩ajax参数，但没有任何运气。

有人知道我做错了什么吗?

$.ajax({
        url: '/Account/PostTest',
        method: 'post',
        cache: false,
        //////// NOTE THE NEXT 2 ATTRIBUTES
        data: JSON.stringify(data),
        contentType: 'application/json; charset=utf-8'
        /////////////////
        success: function () {
            // I never get success...
            alert('Success');
        },
        error: function () {
            alert('Error Post');
        }
    });

using (WebClient client = new WebClient())
{
    response = Newtonsoft.Json.Linq.JObject.Parse(client.DownloadString(fullUrl));
}
Newtonsoft.Json.Linq.JArray items = response.items;
Newtonsoft.Json.Linq.JArray selectedItems = new JArray();
foreach (dynamic rev in reviews)
{
    if (rev.propertyWanted == "condition")
    {
         selectedReviews.Add(rev);
    }
    else
    {
        continue;
    }
}
return selectedReviews;