error in webapi - cannot convert from 'System.Web.Mvc.JsonRequestBehavior' to 'Newtonsoft.Json.JsonSerializerSettings'

Question

in webapi jsonrequestbehaviour is not working , showing cannot convert 'System.Web.Mvc.JsonRequestBehavior' to 'Newtonsoft.Json.JsonSerializerSettings'

code

 public ActionResult AddTemprature(string EmployeeName, int EmployeeId, string Location)
        {
            try
            {

                using (EmployeeDBEntities DB = new EmployeeDBEntities())
                {

                    WebApi.Employee emp = new WebApi.Employee();
                    // EmployeeModel Emp = new EmployeeModel();
                    emp.EmpName = EmployeeName;
                    emp.EmpId = EmployeeId;
                    emp.EmpLocation = Location;
                    DB.Employees.Add(emp);
                    DB.SaveChanges();
                    return Json(true, JsonRequestBehavior.AllowGet);
                }
            }
            catch (Exception Ex)
            {

            }
            return Json(false, JsonRequestBehavior.AllowGet);
        }

Please hover over 'Json' and tell us where it says it's coming from. I suspect that there is some funny-ness, like a duplication of `Json` when it should be looking to the controller for it's Json method — Luke, May 26 '17 at 14:59
enum system.System.Web.Mvc.JsonRequestBehaviour.may be it should be something like this " return Json((object)new { success = false });" — dotnetcoder, May 26 '17 at 15:03
Possible duplicate of [Using JSON.NET as the default JSON serializer in ASP.NET MVC 3 - is it possible?](https://stackoverflow.com/questions/7109967/using-json-net-as-the-default-json-serializer-in-asp-net-mvc-3-is-it-possible) — Majid Parvin, May 26 '17 at 15:12
I just tried it and it doesn't cause a compile error to put a bool in there. As long a `Json` is the pure ASP.NET MVC version of Json. Have you found out where `Json` is defined?? There must be a reason why your `Json` method accepts `JsonSerializerSettings` and not the normal `JsonRequestBehaviour` — Luke, May 26 '17 at 15:12
can you select Json and go to definition, is the definition `protected internal JsonResult Json(object data, JsonRequestBehavior behavior);` — Munzer, May 26 '17 at 18:40

score 5 · Answer 1 · answered Dec 10 '17 at 13:03

You are using controller json respose, instead of ApiController response type. Use below code and you should be all set.

return new JsonResult()
            {
                Data = false,
                JsonRequestBehavior = JsonRequestBehavior.AllowGet
            };

score 0 · Answer 2 · answered Jan 12 '18 at 16:54

0

I had the same problem. Its turned out I had the class defined like " public class PersonalApiController : ApiController" instead of " public class PersonalApiController : Controller". Changing that resolved the problem.

answered Jan 12 '18 at 16:54

Enrique

1

score 0 · Answer 3 · answered Jan 27 '21 at 10:08

Change public class shahriarController : ApiController to public class shahriarController : Controller. You have to inherit from Controller, not from ApiController. It will solve the 'JsonRequestBehavior.AllowGet'.

public class shahriarController : Controller
{
    public ActionResult Get()
    {
        List<Student> list = new List<Student>();
        list.Add(new Student() { Name = "sjass", Roll = "5544" });
        list.Add(new Student() { Name = "wwww", Roll = "0777" });
        list.Add(new Student() { Name = "rrttt", Roll = "4355" });

        return Json(list, JsonRequestBehavior.AllowGet);
    }
}

error in webapi - cannot convert from 'System.Web.Mvc.JsonRequestBehavior' to 'Newtonsoft.Json.JsonSerializerSettings'

3 Answers3