In MVC projects you need to make AJAX call multiple times in your project .

So for doing that you need to first include the Jquery file and its CSS into your view and into your project.

<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<script src="~/Scripts/jquery-ui-1.8.24.min.js"></script>
<link href="~/Content/themes/base/jquery-ui.css" rel="stylesheet" />

After doing this you need to make sure that you have made a function for invoking the controller action.

$(".lnkEdit").live("click", function (e) {
            var id = $(this).attr('id');
             url = '@Url.Content("~/Home/_Edit")/' + id;
            $("#dialog-edit").dialog('open');
            $.get(url,function (result) {
                alert(result);
                 $("#dialog-edit").html(result);
            });

            // e.preventDefault(); use this or return false
            $(".ui-dialog-title").html("Update User");
            $("#dialog-edit").dialog('open');
            return false;
        });

   <a class="lnkEdit" id='@item.EmpId'>Edit</a>

This will invoke the partial view named Edit in the Home controller.

 [HttpGet]
        public ActionResult _Edit(int id = 0)
        {

            EmpMod = new EmployeeModel();
            EmpMod.EmpId = id;
            EmpRep = new EmployeeRepository();
            EmpMod = EmpRep.EditDetails(EmpMod);
            return PartialView("_Edit", EmpMod);

        }