how to do clientside validation for a column in telerikgrid batch editing

See more:

Javascript

jQuery

Telerik

MVC3

Hi all
am doing batch editing and am using ajax binding.grid contains two rows holiday name and holiday date if holiday is same i have to throw an error message in alert.its working but i changed that holiday date and again I saved means it throwing same error the following code I have done.

var Save_Options = new AjaxOptions
   {
       HttpMethod = "POST",
       Url = Url.Action( "_ManageHolidays", new { area = "Masters", controller = "MasterData"} )
              OnSuccess = "OnHolidaySuccess"
   };

Javascript function

function OnHolidaySuccess( e ) {
      var container =  $(".msg_container");
       if(e.HasError==false)
           {
                $("#displayerror").hide();
                var grid = $("#grdHolidays").data("tGrid");
                grid.rebind();
                alert("Saved");
           }

        else
           {
               alert(e.Message.Message);

           }
   }

controller

       [AcceptVerbs(HttpVerbs.Post)]       
        public ActionResult _ManageHolidays(ObservableCollection<HolidayModel> _holiday)
        {
 try
            {
            if (_holiday.Select(h => h.Date).Distinct().Count() == _holiday.Count)
                {
                    save code is done here                          
                 }

              else
                {
                throw new FaultException("Date cannot be same");
                }
       }
  catch (FaultException ex)
            {
             ModelState.AddModelError("", AppHelper.GetMessageFromException(ex));                         
            }
}

its working but if i changed that same date and saved means its showing same alert error because._holiday parameter count is 2 for the first time I press save but it count is 4 when I pressed save for the second time after changing the date.
Any one please Help me to come out of this Problem .