CS0103 C# The name 'Json' does not exist in the current context

Question

Well,

I have written JsonResult funtion. But i get the following error:

CS0103 C# The name 'Json' does not exist in the current context

I cant find solution to it... plzz help?

public JsonResult DoUserExist(string Emailaddress)
{
    bool ch = false;
    string connectionString = ConfigurationManager.ConnectionStrings["FreelanceDBCS"].ConnectionString;

    using (SqlConnection con = new SqlConnection(connectionString))
    {
        SqlCommand cmd = new SqlCommand("GetCities", con);
        cmd.CommandType = System.Data.CommandType.StoredProcedure;
        con.Open();
        SqlDataReader rdr = cmd.ExecuteReader();


        if (rdr != null)
        {
            ch = true;
        }
    }
    return Json(ch,JsonRequestBehavior.AllowGet);

}

Answer 1

I got it !

I have forgotten to derive my class from Controller class

public class User: Controller
{

}

Answer 2

Page must be derived from Controller class to Json () and JsonResult() part by using Microsoft.AspNetCore.Mvc;

If you are using Razor page model then you can face this issue. I got it after too much time spending.

You can also change your page derived from Controller instead of pagemodel like this public class User: Controller