如何将Json对象与Telerik MVC网格重新绑定

m having problem with rebinding grid with Json object….
I

$(\"#DeleteUser\").click(function () {
    if (id != \"\") {
        var answer = confirm(\"Delete user \" + id)
        if (answer) {
            $.ajax({
                type: \"POST\",
                url: \"/Admin/UserDetails\",
                data: \"deleteName=\" + id,
                success: function (data) {

                }
            });
        }
    } else {
        $(\"#erorMessage\").html(\"First you must select user you whant to delete!\");
    }
});

[GridAction]
    public ActionResult UserDetails(string startsWith, string deleteName)
    {   // Custom search...
        if (!string.IsNullOrEmpty(startsWith))
        {
            return GetSearchUserResult(startsWith);
        }
        if (!string.IsNullOrEmpty(deleteName))
        {
            TblUserDetails user = db.TblUserDetails.Single(a => a.TblUser.userName == deleteName);
            try
            {
                TblUser userToDelete = db.TblUser.Single(a => a.userId == user.TblUser.userId);
                db.DeleteObject(user);
                db.DeleteObject(userToDelete);

                db.SaveChanges();
                Membership.DeleteUser(deleteName);

                List<UserDto> retModelData = new List<UserDto>();
                //GetAllUsers() returns a List<UserDto> of users.
                retModelData = GetAllUsers();

                var model = new GridModel
                {
                    Data = retModelData,
                    Total = GetAllUsers().Count()
                };
                return View(model);
            }
            catch
            {
                return View(new GridModel());
            }
        }

        else
        {
            var user = GetAllUsers();
            return View(new GridModel(user));
        }
    }

@(Html.Telerik().Grid<App.Web.Models.UserDto>()
.Name(\"Grid\")
.DataKeys(key =>
{
    key.Add(a => a.Id);
})
.Columns(column =>
{
    column.Bound(a => a.Username).Filterable(false);
    column.Bound(a => a.FirstName).Filterable(false);
    column.Bound(a => a.LastName).Filterable(false);
    column.Bound(a => a.Email).Filterable(false);
})
.DetailView(detailView => detailView.ClientTemplate(
                \"<table id=\'DetailTable\'><tbody><tr class=\'UserRow\'><td class=\'Tbllable\'><b>First name</b></td><td><#= FirstName #></td>\"
                        + \"<td></td><td></td>\"
                        + \"</tr><tr><td class=\'Tbllable\'><b>Last name</b></td>\"
                        + \"<td><#= LastName #></td>\"
                        + \"<td id=\'Roles\'></td><td id=\'Operations\'></td>\"
                        + \"</tr><tr><td class=\'Tbllable\'><b>Username</b></td><td><#= Username #></td></tr><tr><td class=\'Tbllable\'><b>Address</b></td>\"
                        + \"<td><#= Address #></td></tr><tr><td class=\'Tbllable\'><b>Email</b></td><td><#= Email #></td></tr><tr><td class=\'Tbllable\'><b>Birth date</b></td>\"
                        + \"<td></td></tr><tr><td class=\'Tbllable\'><b>Registration date</b></td><td></td></tr><tr><td class=\'Tbllable\'><b>Phone number</b></td>\"
                        + \"<td><#= PhoneNumberHome #></td></tr><tr><td class=\'Tbllable\'><b>Mobile number</b></td><td><#= PhoneNumberMobile #></td></tr></tbody></table>\"
                ))
//.EnableCustomBinding(true)
.DataBinding(bind => bind.Ajax().Select(\"UserDetails\", \"Admin\", new { startsWith = ViewBag.startsWith }))
.Pageable(paging =>
        paging.PageSize(12)
              .Style(GridPagerStyles.NextPreviousAndInput)
              .Position(GridPagerPosition.Bottom)
    )
.ClientEvents(e => e
    .OnRowDataBound(\"Expand\")
    .OnRowSelect(\"select\")
    .OnLoad(\"replaceConfirmation\")
)
    .RowAction(row =>
    {
        if (row.Index == 0)
        {
            row.DetailRow.Expanded = true;
        }
    })
.Editable(editing => editing.Mode(GridEditMode.PopUp))
.Selectable()
.Sortable()