TDataSetFirst class
TDataSetFirst moves to first record in the
DataSet.Declaration
TDataSetFirst = class(TDataSetAction)Inheritance
- TDataSetFirst
- TDataSetAction
- TAction
- TCustomAction
- TContainedAction
- TBasicAction
- TComponent
- TPersistent
- TObject
Description
TDataSetFirst is a
TDataSetAction descendant which
moves to the first record in the dataset for a DataSource. TDataSetFirst can
be added to an action list and assigned to controls which perform the
corresponding action.
TDataSetFirst publishes the
DataSource property which
explicitly declares the target for the database action. The DataSource may be
determined by examining a data-aware control which used the database action,
and passed an an argument to the UpdateTarget and HandlesTarget methods.
See also
- TDataSetLast
- TDataSetNext
- TDataSetPrior
- TDataSetRefresh
- TDataSetCancel
- TDataSetDelete
- TDataSetEdit
- TDataSetInsert
- TDataSetPost
- TDataSetAction
Properties
DataSource | published | DataSource with the dataset for the action. |
Methods
ExecuteTarget | public | Retrieves the dataset for the target datasource and calls its First method. |
UpdateTarget | public | Enables or disables the action based on the state of the dataset in the target. |
Inherited
From TDataSetAction (3)
From TAction (18)
AutoCheck Caption Checked Create DisableIfNoHandler Enabled GroupIndex HelpContext HelpKeyword HelpType Hint ImageIndex OnExecute OnHint OnUpdate SecondaryShortCuts ShortCut Visible
From TCustomAction (20)
AssignTo Destroy DoHint Execute Grayed HandleShortCut SavedEnabledState SetAutoCheck SetCaption SetChecked SetEnabled SetGroupIndex SetHelpContext SetHelpKeyword SetHelpType SetHint SetImageIndex SetName SetShortCut SetVisible
From TContainedAction (8)
ActionList Category GetParentComponent HasParent Index ReadState SetParentComponent Update
From TBasicAction (10)
ActionComponent Change ClientCount Clients GetClient OnChange RegisterChanges SetOnExecute Suspended UnRegisterChanges
From TComponent (68)
_AddRef _Release BeforeDestruction CanObserve ChangeName ComObject ComponentCount ComponentIndex Components ComponentState ComponentStyle DefineProperties DesignInfo DestroyComponents Destroying ExecuteAction FindComponent FreeNotification FreeOnRelease GetChildOwner GetChildParent GetChildren GetDeltaStreams GetEnumerator GetIDsOfNames GetNamePath GetObservers GetOwner GetTypeInfo GetTypeInfoCount iicrGetComponent InsertComponent Invoke IsImplementorOf Loaded Loading Name ObserverAdded Observers OnGetDeltaStreams Owner PaletteCreated QueryInterface ReadDeltaState ReadDeltaStream ReferenceInterface RemoveComponent RemoveFreeNotification RemoveFreeNotifications SafeCallException SetAncestor SetChildOrder SetDesigning SetDesignInstance SetInline SetSubComponent Tag ToString TToStringNameMode UpdateAction Updated UpdateRegistry Updating ValidateContainer ValidateInsert ValidateRename VCLComObject WriteState
From TPersistent (4)
Assign FPOAttachObserver FPODetachObserver FPONotifyObservers
From TObject (37)
AfterConstruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName StringMessageTable SystemHasExtendedRTTI UnitName
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.