TDBLookup

type TDBLookup = class(TComponent)

protected

  procedure Notification(); override;

Performs the notification message received for a component in the class instance.

public

  constructor Create(); override;

Constructor for the class instance.

  destructor Destroy; override;

Destructor for the class instance.

  procedure Initialize();

Initialize makes links between local Fields and the appropriate fields in the remote data source, then fetches the lookup data.

  function KeyFieldValue;

Gets the value(s) for one or more key fields defined for the Field in the linked dataset.

  procedure UpdateData();

Signals the OnUpdateData event handler for pending changes to the linked dataset.

  function GetKeyValue();

Gets the value for the key field at the specified ordinal position in the list of values from the lookup dataset.

  function GetKeyIndex();

Gets the ordinal position in the list for the specified key value.

  property ControlItems: TStrings; [rw]

Contains the items displayed for the lookup control.

  property LookupCache: Boolean; [rw]

Indicates if look-up information is cached in the field data link for the control.

  property KeyField: string; [rw]

The name of the KeyField used in the lookup search.

  property ListField: string; [rw]

ListField - the name of the list field displayed for the lookup.

  property ListFieldIndex: Integer; [rw]

ListFieldIndex - the index value of the list field.

  property ListSource: TDataSource; [rw]

ListSource - the data source that contains the lookup list.

  property NullValueKey: TShortcut; [rw]

Keyboard shortcut which causes an empty value to be assigned to each of the key fields defined for the lookup control.

  property ScrollListDataset: Boolean; [rw]

Indicates if the Dataset in ListSource can be scrolled when loading/locating key and display values.

  property EmptyValue: string; [rw]

Value stored for the lookup control when a lookup value is not available.

  property DisplayEmpty: string; [rw]

Value displayed in the lookup control when a lookup value is not available.

end;

TDBLookup

TDBLookup - used as source of data by TDBLookupListBox or TDBLookupComboBox, to find data from a lookup table.

TComponent,IUnknown,IInterfaceComponentReference

TPersistent,IFPObserved

TObject