AddAllColumns

• To add all the columns of all the Entities that are used in this controller to the columns collection, we can use the AddAllColumns method
• The AddAllColumns method will add all the columns that were not yet added.
• The AddAllColumns method will not add local columns

public class DemoColumnsCollection : UIControllerBase
{
    public readonly Models.Orders Orders = new Models.Orders();
    public readonly Models.Customers Customers = new Models.Customers();
    public DemoColumnsCollection()
    {
        From = Orders;
        Relations.Add(Customers, Customers.CustomerID.IsEqualTo(Orders.CustomerID));

        Columns.Add(Orders.OrderID);
        Columns.Add(Orders.CustomerID);
        Columns.Add(Customers.CustomerID);
        Columns.Add(Orders.OrderDate);
        AddAllColumns();
    }
    public void Run()
    {
        Execute();
    }
    protected override void OnLoad()
    {
        View = () => new Views.DemoColumnsCollectionView(this);
    }
} 

• To add all the columns of a specific relation to the columns collection, we can use the AddAllColumns method of a relation

public class DemoColumnsCollection : UIControllerBase
{
    public readonly Models.Orders Orders = new Models.Orders();
    public readonly Models.Customers Customers = new Models.Customers();
    public DemoColumnsCollection()
    {
        From = Orders;
        Relations.Add(Customers, Customers.CustomerID.IsEqualTo(Orders.CustomerID));

        Columns.Add(Orders.OrderID);
        Columns.Add(Orders.CustomerID);
        Columns.Add(Customers.CustomerID);
        Columns.Add(Orders.OrderDate);
        Relations[Customers].AddAllColumns();
    }
    public void Run()
    {
        Execute();
    }
    protected override void OnLoad()
    {
        View = () => new Views.DemoColumnsCollectionView(this);
    }
} 

• Exercise Relations Recompute

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