Specifies the ON clause linking a joined field with its parent object. When a parent object is loaded from the database all its joined fields and subfields are automatically loaded as well.

For a list of all members of this type, see OnAttribute Members.

System.Object
   Attribute
      OnAttribute

Thread Safety

Public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Instance members are not guaranteed to be thread-safe.

Remarks

All joined properties/fields must be decorated with the OnAttribute. Joined properties/fields must be either of a type derived directly or indirectly from BusinessObject or of a type that implements the IList interface such ArrayList or List<T> where T is a type derived from BusinessObject.

Example

This sample shows a class with two joined fields.

[DataSource("MyDatabase")]
public class Account : BusinessObject
{
    private int _accountID;
    private string _name;
    private int _status;
    private DateTime _createDate;

    [On("accountid")]
    public Person _owner;
    
    [On("accountid", "account_id")]
    [Where("Status", Op.Equals, SubscriptionStatus.Active)]
    public List<Subscription> _subscriptions;
    
    public Account() : base ()
    {
    }

    protected override void OnLoad()
    {
    }
}

Requirements

Namespace: Kredor.BO

Assembly: KREDOR.BOFramework (in KREDOR.BOFramework.dll)

See Also

OnAttribute Members | Kredor.BO Namespace | FromAttribute | WhereAttribute | OrderByAttribute | SelectFrom

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