设置Asp.Net核心MVC Json选项

Question

One of the classes that I have in my project called, say, AC , has a property Address that is of type IPEndPoint . This type, as well as IPAddress , are notorious for not being serializable to JSON by default. Since I needed to serialize my class, I implemented two custom converters: IPAddressConverter and IPEndPointConverter . To make Newtonsoft use these two converters, I made this class:

public sealed class CustomSettings : JsonSerializerSettings
{
    public CustomSettings() : base()
    {
        this.Converters.Add(new IPAddressConverter());
        this.Converters.Add(new IPEndPointConverter());
        this.TypeNameHandling = TypeNameHandling.Auto;
    }
} 

..which I use in my Main like so:

Newtonsoft.Json.JsonConvert.DefaultSettings = () => new CustomSettings();

Now I am trying to add an API to my program. I have created a .Net Core Web API project and have integrated it into my program successfully. However, problems arose when I attempted to write a POST method that required an instance of AC in JSON form from the request body. The serializer couldn't convert the IPEndPoint , and thus the value of AC was always null .

Information regarding configuration of .Net Core APIs is pretty sparse. Can anyone tell me how I can pass those same settings to the MVC's serializer?

EDIT

I found a way (sort of). Turns out you can set the JSON options in the ConfigureServices method.

I attempted to modify the MVC's serializer's settings the same way I did for the rest of my program by doing this:

services.AddMvc().AddJsonOptions(options => options.SerializerSettings = new CustomSettings());

However, this doesn't work as options.SerializerSettings is read only.

I could pass the converters one by one, but I'd prefer if they were all managed from one place (the CustomSettings class). Is this possible?

Answer 1

Create an extension method that encapsulates what it is you want configured

public static void AddCustomSettings(this Newtonsoft.Json.JsonSerializerSettings settings) {
    settings.Converters.Add(new IPAddressConverter());
    settings.Converters.Add(new IPEndPointConverter());
    settings.TypeNameHandling = TypeNameHandling.Auto;
}

And configure it in ConfigureServices

services.AddJsonOptions(options => options.SerializerSettings.AddCustomSettings());