使用JSON.NET库重写WriteJson

Question

I made a simple JsonConverter because I have a page that posts a JSON array which can be of a generic type.

Posting JSON data and converting that to a typed object works fine using the overriden ReadJson method in my custom JsonConverter class.

I also need to read from the database again and I do that like this:

public Element GetElementById(ObjectId id)
{
    return Db.GetCollection<Element>("Elements").Find(x => x.Id == id).FirstOrDefaultAsync().Result;
}

The above method is called by a WebApi method:

[HttpGet]
public Element GetElement()
{
    var element = _elementService.GetElementById(new ObjectId("123e4567b4775f1c48bdabcd"));
    return element;
}

From there it returns the right object from the database. But after the return element then the WriteJson json override method is called in my custom JsonConverter class. That method looks like this:

public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
    throw new NotImplementedException();
}

I don't need to do anything special in the WriteJson method. Because the object that is returned from the database is good. I'd just like to let the WebApi convert that object to JSON and all should be good.

Then how do I implement the WriteJson method when I don't need to do anything special in it?

Answer 1

覆盖CanWrite并返回false：

    public override bool CanWrite { get { return false; } }