Как сделать вызов ajax POST в Visual Studio Rest API

 function Add() {
        var Tname = document.getElementById("TaskName").value.trim();
        var Sdate = document.getElementById("StartDate").value.trim();
        var Edate = document.getElementById("EndDate").value.trim();
        var sms = document.getElementById("chkSMS").checked;
        var email = document.getElementById("chkEmail").checked;
        var assigned = document.getElementById("test").value.trim();

        if (Tname == "")
        {
            alert("Please enter Your Task Name");
            return;
        }
        if (Sdate >= Edate)
        {
            alert("Please Correct the Start And End date");
            return;
        }
        
            var user = $("#test").select2("val");
            console.log(user);

            var model = {
                id:$("#secid").val(),
                projectId: $("#ProjectDropdown").val(),
                task_name: $("#TaskName").val(),
                description: $("#Desc").val(),
                start_date: $("#StartDate").val(),
                end_date: $("#EndDate").val(),
                sms: document.getElementById("chkSMS").checked,
                email: document.getElementById("chkEmail").checked,
                status:"1",
                tempUsers: user
            };
            console.log(model);
            $.ajax
                (
                    {
              
                url: '/api/TaskApi/',
                type: 'POST',
                data: model,
                dataType: "json",
                success: function (data) {
                    alert('Task Added');
                   // location.reload(); // this is not a good practice
                },
                error: function () { alert('Task not Added'); }
            });
        
    }

   [Route("/api/TaskApi/"), HttpPost]
        public String CreateTask(tempTask tempTask )
        {

            Task task = new Task();
            task.enable = true;
            task.created_on = DateTime.Now;
            task.task_name = tempTask.task_name;
            task.description = tempTask.description;
            task.start_date = tempTask.start_date;
            task.end_date = tempTask.end_date;
            task.status = tempTask.status;
            task.sms = tempTask.sms;
            task.email = tempTask.email;
            db.task.Add(task);
            Tagging tag = new Tagging();
            tag.tasks = task;
            tag.project = db.project.Find(tempTask.projectId);
            List<Users> usr = new List<Users>();
            for (int i = 0; i < tempTask.tempUsers.Count; i++)
            {

                var user = db.user.Find(tempTask.tempUsers[i]);
                usr.Add(user);
            }
            tag.users = usr;
            db.tagging.Add(tag);
            if (db.SaveChanges() > 0)
            {
                return "task success!!";

            }
            else
            {
                return "Some Error";
            }

           
        }

   public class tempTask
    {
        public int id { get; set; }
        public int projectId { get; set; }
        public string task_name { get; set; }
        public string description { get; set; }
        public DateTime start_date { get; set; }
        public DateTime end_date { get; set; }
        public bool sms { get; set; }
        public bool email { get; set; }
        public int status { get; set; }
        public List<int> tempUsers { get; set; }
    }