[Solved] Row client selection and ajax binding problems

[Adriano]

Hi all, we have followed your demo http://demos.telerik.com/aspnet-mvc/razor/grid/selectionclientside for using client selection in a master grid and updating data in a detail grid. But, after the initial binding, all the following ajax operations (sorting, paging, refresh) on the detail grid are returning no data. In your sample happens the same thing (for example, if you select the customer id GREAL and go to the page 2 in the orders grid, this page is empty).

Does it exist a solution to that?  

[Rosen]

Hi Adriano,

Indeed, you are correct in your observation. In order to achieve the desired functionality you should use the databinding event of the child grid to pass the selected id. I have attached a modified version of the View from the example in order to illustrate this.

Best wishes,
Rosen
the Telerik team

[Staci]

I have also been trying to follow the SelectionClientSide code but have not had much luck getting it to work. The main difference I can see is that Northwind tables Customers and Orders are related by the CustomerID which is a string, my tables are connected by an integer ID. The code held in the SelectionClientSideController is this:

[GridAction]
        public ActionResult _SelectionClientSide_Orders(string customerID)
        {
            customerID = customerID ?? "ALFKI";

            return View(new GridModel<Order>
            {
                Data = GetOrdersForCustomer(customerID)
            });
        }

if I change it to take an integer like this:

[GridAction]
        public ActionResult _SelectionClientSide_Campaigns(int clientID)
        {
            clientID = clientID ??  1;

            return View(new GridModel<tbl_Campaign>
            {
                Data = GetCampaignsForClient(clientID)
            });
        }

I get the following error message - Operator '??' cannot be applied to operands of type 'int' and 'int'. I have tried to check for a null by using an if statement like this:

[GridAction]
        public ActionResult _SelectionClientSide_Campaigns(int clientID)
        {
           if (clientID == null)
            {
                clientID = 1;
            }
            return View(new GridModel<tbl_Campaign>
            {
                Data = GetCampaignsForClient(clientID)
            });
        }

which doesn't give me an error message but my grids are empty. I'm obviously missing something, but not sure what. Another thing I have noticed throughout the MVC examples solution is the namespace "using Models" is used but I'm not sure what this is. Is this referring to the Models folder? Also for this demo, is a Model being used, if so which one because I can't figure out where it is.

All files involved are attached.

Many thanks
Staci