serverbinding in Telerik grid in MVC

I have bound the grid using server bing and the grid update method is working, but the delete method is not. I would be grateful for any suggestions as to what might be the problem.

View

<%=Html.Telerik().Grid(Model).Name("Grid").DataKeys(keys => keys.Add(m => m.ResExpID))
    .Columns(columns=>      
    {
        columns.Bound(m => m.ResExpID).Width(100);
        columns.Bound(m => m.Company).Width(100);
        //columns.Bound("Title").Width(100);
        columns.Bound(m=>m.Title).Width(200);
        columns.Command(commands =>
        {         
            commands.Edit().ButtonType(GridButtonType.Text);
            commands.Delete().ButtonType(GridButtonType.Text);     
        }).Width(200).Title("Command");

    // columns.Bound(<asp>).Width(200);
    })
     .ClientEvents(events => events.OnRowSelect("onRowSelected"))
        .DataBinding(dataBinding => 
        {
            dataBinding.Server()
              .Select("WorkExperience","Editresume")
              .Update("_SaveAjaxEditing", "Editresume")
              .Delete("_Deleteexper开发者_如何学运维ience","Editresume");             
        })
        .Scrollable(scrolling => scrolling.Enabled((bool)ViewData["scrolling"]))
        .Sortable(sorting => sorting.Enabled((bool)ViewData["sorting"]))
        .Pageable(paging => paging.Enabled((bool)ViewData["paging"]))
        .Filterable(filtering => filtering.Enabled((bool)ViewData["filtering"]))
        .Groupable(grouping => grouping.Enabled((bool)ViewData["grouping"]))
        .Footer((bool)ViewData["showFooter"])
        .Editable(editing=>editing.Mode(GridEditMode.PopUp))
        // .Editable(editing => editing.Enabled((bool)ViewData["mode"]))
        .RowAction(row => row.Selected = row.DataItem.ResExpID.Equals(ViewData["id"]))       
%> 

Controller

public ActionResult WorkExperience()
{
    int resumeid = Convert.ToInt32(Session["resumeid"].ToString());
    int uid = Convert.ToInt32(HttpContext.User.Identity.Name);
    var re = (from j in db.Resumes
                  join res in db.Res_Exp on j.ResumeID equals res.Resume.ResumeID
                  where j.ResumeID == resumeid && j.User.UserID==uid
                  select res
             ).AsEnumerable();

    ViewData["ajax"] = true;
    ViewData["scrolling"] = true;
    ViewData["paging"] = true;
    ViewData["filtering"] = true;
    ViewData["grouping"] = true;
    ViewData["sorting"] = true;
    ViewData["showFooter"] = true;
    ViewData["mode"] = false;
    if (Request.QueryString["Grid-mode"] != null)
    {
        ViewData["mode"] = true;
    }
    return View(re);  
}

[HttpPost]    
public ActionResult _Deleteexperience(int resexpid,FormCollection f)
{
    var user = (from results in db.Res_Exp
        where results.ResExpID == resexpid select results).Single();
    Res_Exp exp = (Res_Exp)user;
    db.Res_Exp.DeleteObject(exp);
    db.SaveChanges();
    return RedirectToAction("WorkExperience");
}