Automatically Generating Order Id on a new row

ViewModels\OrdersViewModel.cs

class OrdersViewModel : ViewModel
{
    Northwind.Models.Orders Orders = new Northwind.Models.Orders();
    public OrdersViewModel()
    {
        From = Orders;
        AllowUpdate = true;
        AllowInsert = true;
        AllowDelete = true;
    }
    protected override void OnSavingRow()
    {
        if (Activity == Activities.Insert)
            Orders.OrderID.Value = Orders.Max(Orders.OrderID) + 1;
    }
} 

That's it for the server code, now let's allow insert and delete on the grid. src/app/app.component.ts

export class AppComponent {
    customers = new models.customers();
    orders = new models.orders(
        {
            numOfColumnsInGrid: 4,
            allowUpdate: true,
            allowInsert: true,
            allowDelete: true,
            columnSettings: [
                { key: "id", caption: "Order ID", readonly: true },
... 

Let's see that it works:

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