Why can not return json from web api controller?

Question

I'm new in asp.net mvc and want to return json with web api controller,for that purpose write this code:

public JsonResult Get()
        {
            var users = GetUsers();
            return Json(users, JsonRequestBehavior.AllowGet);
        }
        private List<TestModel> GetUsers()
        {
            var usersList = new List<TestModel>
            {
                new TestModel
                {
                    id = "1",
                    name = "behzad"
                }
            };
            return usersList;
        }

but int this line:

JsonRequestBehavior.AllowGet

get this error:

Severity Code Description Project File Line Suppression State Error CS1503 Argument 2: cannot convert from 'System.Web.Mvc.JsonRequestBehavior' to 'Newtonsoft.Json.JsonSerializerSettings' WebApplication1 D:\behzad\project\aspweb api\WebApplication1\WebApplication1\Controllers\HelloController.cs 17 Active

return Json(new SelectList(users.ToArray(), "id", "name"), JsonRequestBehavior.AllowGet); Try this it will work — Laxman Gite
– Laxman Gite, Commented May 25, 2017 at 8:51
var statelist = _masterService.GetStates().Where(st => st.CountryId == Id).ToList(); return Json(new SelectList(statelist.ToArray(), "Id", "Name"), JsonRequestBehavior.AllowGet); make your code like this — Laxman Gite
– Laxman Gite, Commented May 25, 2017 at 8:54

Majid Parvin · Accepted Answer · 2017-10-02 04:12:19Z

2

If you want to all your ASP.Net Web API result return JSON. you need a global configuration to make your action comfortable.

for this case, you don't need to call any extra service to resolve JSON. follow this:

    public List<TestModel> Get()
    {
        return GetUsers();
    }

but you need some setting to have it, put below line to the Global.asax file and Application_Start method:

GlobalConfiguration.Configuration.Formatters.Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);

edited Oct 2, 2017 at 4:12

answered May 25, 2017 at 9:21

Majid Parvin

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Comments

Amirhosein Rajabi · Accepted Answer · 2017-05-25 09:08:21Z

0

public IHttpActionResult Get()
{
        var users = GetUsers();            
        return Ok(users);
}
private List<TestModel> GetUsers()
{
        var usersList = new List<TestModel>
        {
            new TestModel
            {
                id = "1",
                name = "behzad"
            }
        };
        return usersList;
 }

answered May 25, 2017 at 9:08

Amirhosein Rajabi

812 silver badges12 bronze badges

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