Controller.json set Serialization.ReferenceLoopHandling

Question

is there a way to set Controller.Json ReferenceLoopHandling property?

It is currently causing a self referencing loop when parsing entities with navigation properties defined on both ends. This problem is solved by setting

ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;

Is there a way to do this for Controller.Json method?

I found this piece of code, but it does not seem to work.

services.Configure<MvcOptions>(option =>
        {
            option.OutputFormatters.Clear();
            var jsonOutputFormatter = new JsonOutputFormatter();
            jsonOutputFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;

            option.OutputFormatters.Insert(0, jsonOutputFormatter);
        });

Try to follow [the answer](http://stackoverflow.com/a/34836837/315935). — Oleg, Jan 20 '16 at 06:32

Tanato · Answer 1 · 2016-10-06T23:00:19.060

15

I think that a prettier solution for this is to add JsonOptions in your ConfigureServices like:

services.AddMvc().AddJsonOptions(options =>
{
    options.SerializerSettings.ReferenceLoopHandling = 
                               Newtonsoft.Json.ReferenceLoopHandling.Ignore;
});

edited Oct 06 '16 at 23:00

answered Sep 22 '16 at 14:39

Tanato

895
12
23

score 2 · Answer 2 · answered Apr 14 '16 at 20:23

The question is from some time ago but it still can help other people.

Try this in your ConfigureServices method of the Startup class:

services.AddMvc(options =>
{
    ((JsonOutputFormatter)options.OutputFormatters.Single(f => f.GetType() == typeof(JsonOutputFormatter))).SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
});

or

services.AddMvc(options =>
{
    var jsonOutputFormatter = options.OutputFormatters.SingleOrDefault(f => f.GetType() == typeof(JsonOutputFormatter)) as JsonOutputFormatter;
    if (jsonOutputFormatter != null)
        jsonOutputFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
});

Alternative form for core: `services.AddMvcCore() .AddJsonFormatters(j => j.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore)` — CrazyPyro, Jul 19 '16 at 19:38

score 2 · Answer 3 · answered Nov 12 '19 at 20:26

2

This worked for me with .NET Core 3.0.

services.AddMvcCore().AddNewtonsoftJson(
    options => options.SerializerSettings.ReferenceLoopHandling =
        Newtonsoft.Json.ReferenceLoopHandling.Ignore);

answered Nov 12 '19 at 20:26

Dustin C

215
6
15

1

I had to add a NuGet reference to `Microsoft.AspNetCore.Mvc.NewtonsoftJson` – Aaron Jan 17 '20 at 17:08

Controller.json set Serialization.ReferenceLoopHandling

3 Answers3

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