[Solved] _SelectAjaxEditing not working

[USMAN]

Hi, I have some linked tables from which I want to display one table records, it is working on one of the table, but not working on another one.

My code for Ajax Binding is as follows:

[[ View ]]

<%= Html.Telerik().Grid<PaceTelerik.Models.Stock>()
        .Name("Grid")
        .DataKeys(keys =>
        {
            keys.Add(p => p.Stock_ID);
        })
        .ToolBar(commands =>
        {
            commands.Insert().ButtonType(GridButtonType.ImageAndText).ImageHtmlAttributes(new { style = "margin-left:0" });
        })
        .DataBinding(dataBinding =>
        {
            dataBinding.Ajax().OperationMode(GridOperationMode.Server)
                .Select("_SelectAjaxEditing", "Stock")
                .Insert("_InsertAjaxEditing", "Stock")
                .Update("_SaveAjaxEditing", "Stock")
                .Delete("_DeleteAjaxEditing", "Stock");
        })
        .Columns(columns =>
        {
            columns.Bound(p => p.Description).Width(210);


            columns.Command(commands =>
            {
                commands.Edit().ButtonType(GridButtonType.Text);
                commands.Delete().ButtonType(GridButtonType.Text);
            }).Width(200).Title("Commands");
        })
            .Editable(editing => editing
                .Mode(GridEditMode.PopUp))
        .Pageable()
        .Scrollable()
        .Sortable()
%>

[[ Controller ]]

//Ajax Grid Editing Code//

      [GridAction]
      public ActionResult _SelectAjaxEditing()
      {
      return View(new GridModel(SessionStockRepository.All()));

      }
      [AcceptVerbs(HttpVerbs.Post)]
      // [CultureAwareAction]
      [GridAction]
      public ActionResult _SaveAjaxEditing(int id)
      {
          Stock stock = SessionStockRepository.One(p => p.Stock_ID == id);

          TryUpdateModel(stock);
          SessionStockRepository.Update(stock);
          return View(new GridModel(SessionStockRepository.All()));
      }
      [AcceptVerbs(HttpVerbs.Post)]
      // [CultureAwareAction]
      [GridAction]
      public ActionResult _InsertAjaxEditing()
      {
          //Create a new instance of the Editablestock class.
          Stock stock = new Stock();
          //Perform model binding (fill the stock properties and validate it).
          if (TryUpdateModel(stock))
          {
              //The model is valid - insert the stock.
              SessionStockRepository.Insert(stock);
          }
          //Rebind the grid
          return View(new GridModel(SessionStockRepository.All()));
      }
      [AcceptVerbs(HttpVerbs.Post)]
      [GridAction]
      public ActionResult _DeleteAjaxEditing(int id)
      {
          //Find a customer with stockID equal to the id action parameter
          Stock stock = SessionStockRepository.One(p => p.Stock_ID == id);
          if (stock != null)
          {
              //Delete the record
              SessionStockRepository.Delete(stock);
          }

          //Rebind the grid
          return View(new GridModel(SessionStockRepository.All()));
      }

[[SessionStockRepository]]

public  static class SessionStockRepository
  {


      public static IList<Stock> All()
      {
          IList<Stock> result =
               (IList<Stock>)HttpContext.Current.Session["Stocks"];
          if (result == null)
          {
              B4GEntities_Procurement db = new B4GEntities_Procurement();

              var query = db.Stocks.Include("StockCategory").Include("StockType").Include("Supplier");

              HttpContext.Current.Session["Stocks"] = result =
                  (from product in query
                   select product)
                  .ToList();
          }
          return result;
      }
      public static Stock One(Func<Stock, bool> predicate)
      {
          return All().Where(predicate).FirstOrDefault();
      }
      public static void Insert(Stock product)
      {
          product.Stock_ID = All().OrderByDescending(p => p.Stock_ID).First().Stock_ID + 1;
          All().Insert(0, product);
      }
      public static void Update(Stock product)
      {
          Stock target = One(p => p.Stock_ID == product.Stock_ID);
          if (target != null)
          {
              target.Description = product.Description;
              target.CurrentStockLevel = product.CurrentStockLevel;

          }
      }
      public static void Delete(Stock product)
      {
          Stock target = One(p => p.Stock_ID == product.Stock_ID);
          if (target != null)
          {
              All().Remove(target);
          }
      }

But After this Im getting the Following Error on View

"Error: The requested URL returned 500 - Internal Server Error"

I also have attached the snapshot of screen.

[USMAN]

Thanks to Me :-)

I have Solved it.
I have used a Stored procedure for updating the record. and its working.

db.UpdateCancellationReason(cancellationReason.CancellationReason_ID, cancellationReason.CancellationReason1);
db.SaveChanges();

SessionCancellationRepository.Update(cancellationReason);