TreeListView Events

A View that displays information in a tree hierarchical structure.

Name	Description
AddingNewNode	Occurs before a new node is added to the GridControl and allows you to initialize the new record.
BeforeLayoutRefresh	Enables you to lock down end-user capabilities that affect the onscreen position of the focused row (moving row focus, row scrolling, filtering, sorting, etc.). Inherited from DataViewBase.
CanSelectCell	Occurs in multiple cell selection mode when a user tries to select a cell and allows you to prevent the cell selection.
CanSelectRow	Occurs in multiple row select mode when an end-user tries to select a grid row (node) and allows you to prevent selecting a particular row (node). Inherited from DataViewBase.
CanUnselectCell	Occurs in multiple cell selection mode when a user tries to unselect a cell and allows you to prevent this operation for a particular cell.
CanUnselectRow	Occurs in multiple row select mode when an end-user tries to unselect a grid row (node) and allows you to prevent unselecting a particular row (node). Inherited from DataViewBase.
CellValueChanged	Occurs when a cell value is changed.
CellValueChanging	Occurs when a user edits a cell value (for example, types or deletes a character, chooses a value from the drop-down list).
ClipboardNodeCopying	Fires before a data row, group row, column headers, or band headers are copied to the clipboard. Allows you to apply a format, change the copied data, or skip a data row or header.
ClipboardRowCellValuePasting	Fires when an end-user pastes a cell to the TreeListView and allows you to process the pasted data.
ClipboardRowPasting	Fires when an end-user pastes a node to the TreeListView and allows you to process the pasted data.
ColumnHeaderClick	Occurs when a column header is clicked. Inherited from DataViewBase.
CompleteRecordDragDrop	Occurs when a drag-and-drop operation is completed. Inherited from DataViewBase.
ContextMenuClosing	Occurs just before any context menu on the element is closed. Inherited from FrameworkElement.
ContextMenuOpening	Occurs when any context menu on the element is opened. Inherited from FrameworkElement.
ContinueRecordDrag	Occurs when there is a change in the keyboard or mouse button states during a drag-and-drop operation, and enables the drop source to cancel the drag-and-drop operation depending on the key/button states. Inherited from DataViewBase.
CopyingToClipboard	Obsolete. Occurs when data is copied to the clipboard, allowing you to manually copy required data.
CreateRootNodeCompleted	Inherited from DataViewBase.
CustomBestFit	Allows you to manually calculate the optimal width for a column(s).
CustomCellAppearance	Allows overriding the cell’s foreground and background settings.
CustomColumnDisplayText	Allows you to customize a data cell‘s display text.
CustomColumnSort	Enables you to sort data using custom rules.
CustomDataUpdateFormatCondition	Allows defining a custom logic of conditional formatting of the changed grid cells (rows).
CustomFilterDisplayText	Allows you to display custom text instead of a filter expression in the legacy Filter Panel. Inherited from DataViewBase.
CustomFilterPopupList	Allows you to filter values displayed in a column Drop-down Filter.
CustomNodeFilter	Allows you to use custom rules to filter nodes.
CustomRowAppearance	Allows overriding the row’s foreground and background settings.
CustomScrollAnimation	Enables you to provide custom animation played when grid data is vertically scrolled (per-pixel).
CustomSummary	Enables you to calculate summary values manually.
CustomUnboundColumnData	Allows you to populate unbound columns with data.
DataContextChanged	Occurs when the data context for this element changes. Inherited from FrameworkElement.
DataSourceRefresh	Occurs before the data source is refreshed (a user presses F5 or executes the RefreshDataSource command) and allows you to implement custom refresh logic. Inherited from DataViewBase.
DragEnter	Occurs when the input system reports an underlying drag event with this element as the drag target. Inherited from UIElement.
DragLeave	Occurs when the input system reports an underlying drag event with this element as the drag origin. Inherited from UIElement.
DragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. Inherited from UIElement.
DragRecordOver	Occurs continuously while a record is dragged (moved) within the drop target’s boundary. Inherited from DataViewBase.
Drop	Occurs when the input system reports an underlying drop event with this element as the drop target. Inherited from UIElement.
DropRecord	Occurs when a record is dropped on the drop target element. Inherited from DataViewBase.
EditFormShowing	Occurs when the TreeListView is about to display the Edit Form.
EndSorting	Occurs after a sorting operation has been completed.
FilterEditorCreated	Fires after the embedded FilterControl has been created. This event is not fired for the new FilterEditorControl. Inherited from DataViewBase.
FocusableChanged	Occurs when the value of the Focusable property changes. Inherited from UIElement.
FocusedColumnChanged	Obsolete. Occurs after the focused column has been changed. Inherited from DataViewBase.
FocusedRowChanged	Obsolete. Occurs after the focused row has been changed. Inherited from DataViewBase.
FocusedRowHandleChanged	Occurs after the focused row’s handle has been changed. Inherited from DataViewBase.
FocusedRowHandleChanging	Occurs when the focused row handle is about to change. Inherited from DataViewBase.
FocusedViewChanged	Occurs after the active View has been changed. Inherited from DataViewBase.
GetActiveEditorNeedsKey	Allows you to specify whether an active editor responds to keys that a user presses. Inherited from DataViewBase.
GetIsEditorActivationAction	Allows you to specify whether an action (key down, text input, or mouse left button click) activates the focused editor. Inherited from DataViewBase.
GiveFeedback	Occurs when the input system reports an underlying drag-and-drop event that involves this element. Inherited from UIElement.
GiveRecordDragFeedback	Occurs continuously while a drag-and-drop operation is in progress, and enables the drag source to give feedback to the user. Inherited from DataViewBase.
GotFocus	Occurs when this element gets logical focus. Inherited from UIElement.
GotKeyboardFocus	Occurs when the keyboard is focused on this element. Inherited from UIElement.
GotMouseCapture	Occurs when this element captures the mouse. Inherited from UIElement.
GotStylusCapture	Occurs when this element captures the stylus. Inherited from UIElement.
GotTouchCapture	Occurs when a touch is captured to this element. Inherited from UIElement.
HiddenColumnChooser	Occurs after the Column Chooser has been hidden. Inherited from DataViewBase.
HiddenEditor	Occurs after a cell’s editor has been closed.
Initialized	Occurs when this FrameworkElement is initialized. This event coincides with cases where the value of the IsInitialized property changes from false (or undefined) to true. Inherited from FrameworkElement.
InitNewNode	Allows you to initialize a new node with default values.
InitNewRow	Obsolete. Allows you to initialize a new row with default values.
InvalidNodeException	Occurs when a node fails validation or cannot be saved to a data source.
IsEnabledChanged	Occurs when the value of the IsEnabled property on this element changes. Inherited from UIElement.
IsHitTestVisibleChanged	Occurs when the value of the IsHitTestVisible dependency property changes on this element. Inherited from UIElement.
IsKeyboardFocusedChanged	Occurs when the value of the IsKeyboardFocused property changes on this element. Inherited from UIElement.
IsKeyboardFocusWithinChanged	Occurs when the value of the IsKeyboardFocusWithin property changes on this element. Inherited from UIElement.
IsMouseCapturedChanged	Occurs when the value of the IsMouseCaptured property changes on this element. Inherited from UIElement.
IsMouseCaptureWithinChanged	Occurs when the value of the IsMouseCaptureWithinProperty changes on this element. Inherited from UIElement.
IsMouseDirectlyOverChanged	Occurs when the value of the IsMouseDirectlyOver property changes on this element. Inherited from UIElement.
IsStylusCapturedChanged	Occurs when the value of the IsStylusCaptured property changes on this element. Inherited from UIElement.
IsStylusCaptureWithinChanged	Occurs when the value of the IsStylusCaptureWithin property changes on this element. Inherited from UIElement.
IsStylusDirectlyOverChanged	Occurs when the value of the IsStylusDirectlyOver property changes on this element. Inherited from UIElement.
IsVisibleChanged	Occurs when the value of the IsVisible property changes on this element. Inherited from UIElement.
KeyDown	Occurs when a key is pressed while focus is on this element. Inherited from UIElement.
KeyUp	Occurs when a key is released while focus is on this element. Inherited from UIElement.
LayoutUpdated	Occurs when the layout of the various visual elements associated with the current Dispatcher changes. Inherited from UIElement.
Loaded	Occurs when the element is laid out, rendered, and ready for interaction. Inherited from FrameworkElement.
LostFocus	Occurs when this element loses logical focus. Inherited from UIElement.
LostKeyboardFocus	Occurs when the keyboard is no longer focused on this element. Inherited from UIElement.
LostMouseCapture	Occurs when this element loses mouse capture. Inherited from UIElement.
LostStylusCapture	Occurs when this element loses stylus capture. Inherited from UIElement.
LostTouchCapture	Occurs when this element loses a touch capture. Inherited from UIElement.
ManipulationBoundaryFeedback	Occurs when the manipulation encounters a boundary. Inherited from UIElement.
ManipulationCompleted	Occurs when a manipulation and inertia on the UIElement object is complete. Inherited from UIElement.
ManipulationDelta	Occurs when the input device changes position during a manipulation. Inherited from UIElement.
ManipulationInertiaStarting	Occurs when the input device loses contact with the UIElement object during a manipulation and inertia begins. Inherited from UIElement.
ManipulationStarted	Occurs when an input device begins a manipulation on the UIElement object. Inherited from UIElement.
ManipulationStarting	Occurs when the manipulation processor is first created. Inherited from UIElement.
MouseDoubleClick	Occurs when a mouse button is clicked two or more times. Inherited from Control.
MouseDown	Occurs when any mouse button is pressed while the pointer is over this element. Inherited from UIElement.
MouseEnter	Occurs when the mouse pointer enters the bounds of this element. Inherited from UIElement.
MouseLeave	Occurs when the mouse pointer leaves the bounds of this element. Inherited from UIElement.
MouseLeftButtonDown	Occurs when the left mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
MouseLeftButtonUp	Occurs when the left mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
MouseMove	Occurs when the mouse pointer moves while over this element. Inherited from UIElement.
MouseRightButtonDown	Occurs when the right mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
MouseRightButtonUp	Occurs when the right mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
MouseUp	Occurs when any mouse button is released over this element. Inherited from UIElement.
MouseWheel	Occurs when the user rotates the mouse wheel while the mouse pointer is over this element. Inherited from UIElement.
NodeCanceled	Occurs when the changes made in a node are discarded.
NodeChanged	Occurs when a node’s property changes.
NodeCheckStateChanged	Occurs when a node’s check box has changed its value.
NodeCollapsed	Occurs after a node has been collapsed.
NodeCollapsing	Occurs before a node is collapsed and allowing the action to be canceled.
NodeEditFinished	Occurs when a user finished the edit operation in a node.
NodeEditStarted	Occurs when a user edits a node.
NodeEditStarting	Occurs when a user starts to edit a node.
NodeExpanded	Occurs after a node has been expanded.
NodeExpanding	Occurs before a node is expanded.
NodeUpdated	Occurs when the GridControl updates the data source with the changes made within the focused node.
PastingFromClipboard	Obsolete. Occurs when some information is pasted from the clipboard to the grid. Inherited from DataViewBase.
PreviewDragEnter	Occurs when the input system reports an underlying drag event with this element as the drag target. Inherited from UIElement.
PreviewDragLeave	Occurs when the input system reports an underlying drag event with this element as the drag origin. Inherited from UIElement.
PreviewDragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. Inherited from UIElement.
PreviewDrop	Occurs when the input system reports an underlying drop event with this element as the drop target. Inherited from UIElement.
PreviewGiveFeedback	Occurs when a drag-and-drop operation is started. Inherited from UIElement.
PreviewGotKeyboardFocus	Occurs when the keyboard is focused on this element. Inherited from UIElement.
PreviewKeyDown	Occurs when a key is pressed while focus is on this element. Inherited from UIElement.
PreviewKeyUp	Occurs when a key is released while focus is on this element. Inherited from UIElement.
PreviewLostKeyboardFocus	Occurs when the keyboard is no longer focused on this element. Inherited from UIElement.
PreviewMouseDoubleClick	Occurs when a user clicks the mouse button two or more times. Inherited from Control.
PreviewMouseDown	Occurs when any mouse button is pressed while the pointer is over this element. Inherited from UIElement.
PreviewMouseLeftButtonDown	Occurs when the left mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseLeftButtonUp	Occurs when the left mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseMove	Occurs when the mouse pointer moves while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseRightButtonDown	Occurs when the right mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseRightButtonUp	Occurs when the right mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseUp	Occurs when any mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseWheel	Occurs when the user rotates the mouse wheel while the mouse pointer is over this element. Inherited from UIElement.
PreviewQueryContinueDrag	Occurs when there is a change in the keyboard or mouse button state during a drag-and-drop operation. Inherited from UIElement.
PreviewStylusButtonDown	Occurs when the stylus button is pressed while the pointer is over this element. Inherited from UIElement.
PreviewStylusButtonUp	Occurs when the stylus button is released while the pointer is over this element. Inherited from UIElement.
PreviewStylusDown	Occurs when the stylus touches the digitizer while it is over this element. Inherited from UIElement.
PreviewStylusInAirMove	Occurs when the stylus moves over an element without actually touching the digitizer. Inherited from UIElement.
PreviewStylusInRange	Occurs when the stylus is close enough to the digitizer to be detected, while over this element. Inherited from UIElement.
PreviewStylusMove	Occurs when the stylus moves while over the element. The stylus must move while being detected by the digitizer to raise this event, otherwise, PreviewStylusInAirMove is raised instead. Inherited from UIElement.
PreviewStylusOutOfRange	Occurs when the stylus is too far from the digitizer to be detected. Inherited from UIElement.
PreviewStylusSystemGesture	Occurs when a user performs one of several stylus gestures. Inherited from UIElement.
PreviewStylusUp	Occurs when the user raises the stylus off the digitizer while the stylus is over this element. Inherited from UIElement.
PreviewTextInput	Occurs when this element gets text in a device-independent manner. Inherited from UIElement.
PreviewTouchDown	Occurs when a finger touches the screen while the finger is over this element. Inherited from UIElement.
PreviewTouchMove	Occurs when a finger moves on the screen while the finger is over this element. Inherited from UIElement.
PreviewTouchUp	Occurs when a finger is raised off of the screen while the finger is over this element. Inherited from UIElement.
ProcessEditorActivationAction	Allows you to specify whether the focused editor should process an activation action. Inherited from DataViewBase.
PropertyChanged	Occurs every time the DataViewBase.FocusedView property has changed its value. Inherited from DataViewBase.
QueryContinueDrag	Occurs when there is a change in the keyboard or mouse button state during a drag-and-drop operation. Inherited from UIElement.
QueryCursor	Occurs when the cursor is requested to display. This event is raised on an element each time that the mouse pointer moves to a new location, which means the cursor object might need to be changed based on its new position. Inherited from UIElement.
RequestBringIntoView	Occurs when BringIntoView(Rect) is called on this element. Inherited from FrameworkElement.
RowAnimationBegin	Enables you to provide a custom animation effect after row data has been asynchronously retrieved from a data source. Inherited from DataViewBase.
RowDoubleClick	Occurs when a user double-clicks a node.
ScrollBarAnnotationsCreating	Allows creating a set of predefined scrollbar annotations.
ScrollBarCustomRowAnnotation	Allows creating a new scrollbar annotation based on data row values and a row handle.
SearchStringToFilterCriteria	Occurs each time the GridControl starts to search data and allows you to convert the search string to filter criteria. Inherited from DataViewBase.
SelectionChanged	Obsolete. Occurs after treelist’s selection has been changed.
ShowFilterPopup	Allows you to customize a column’s drop-down filter. Inherited from DataViewBase.
ShowGridMenu	Enables you to customize the context menu. Inherited from DataViewBase.
ShowingEditor	Enables you to prevent an end-user from activating editors of individual cells.
ShowingNodeFooter	Fires for each parent node before showing its node footer.
ShownColumnChooser	Occurs after the Column Chooser has been shown. Inherited from DataViewBase.
ShownEditor	Occurs after the focused cell’s editor has been shown.
SizeChanged	Occurs when either the ActualHeight or the ActualWidth properties change value on this element. Inherited from FrameworkElement.
SourceUpdated	Occurs when the source value changes for any existing property binding on this element. Inherited from FrameworkElement.
StartRecordDrag	This event occurs when a drag-and-drop operation is started. Inherited from DataViewBase.
StartSorting	Occurs before a sorting operation is started.
StylusButtonDown	Occurs when the stylus button is pressed while the pointer is over this element. Inherited from UIElement.
StylusButtonUp	Occurs when the stylus button is released while the pointer is over this element. Inherited from UIElement.
StylusDown	Occurs when the stylus touches the digitizer while the stylus is over this element. Inherited from UIElement.
StylusEnter	Occurs when the stylus enters the bounds of this element. Inherited from UIElement.
StylusInAirMove	Occurs when the stylus moves over an element without actually touching the digitizer. Inherited from UIElement.
StylusInRange	Occurs when the stylus is close enough to the digitizer to be detected, while over this element. Inherited from UIElement.
StylusLeave	Occurs when the stylus leaves the bounds of the element. Inherited from UIElement.
StylusMove	Occurs when the stylus moves over this element. The stylus must move while on the digitizer to raise this event. Otherwise, StylusInAirMove is raised instead. Inherited from UIElement.
StylusOutOfRange	Occurs when the stylus is too far from the digitizer to be detected, while over this element. Inherited from UIElement.
StylusSystemGesture	Occurs when a user performs one of several stylus gestures. Inherited from UIElement.
StylusUp	Occurs when the user raises the stylus off the digitizer while it is over this element. Inherited from UIElement.
SubstituteFilter	Allows you to replace the applied filter with another filter.
TargetUpdated	Occurs when the target value changes for any property binding on this element. Inherited from FrameworkElement.
TextInput	Occurs when this element gets text in a device-independent manner. Inherited from UIElement.
ToolTipClosing	Occurs just before any tooltip on the element is closed. Inherited from FrameworkElement.
ToolTipOpening	Occurs when any tooltip on the element is opened. Inherited from FrameworkElement.
TouchDown	Occurs when a finger touches the screen while the finger is over this element. Inherited from UIElement.
TouchEnter	Occurs when a touch moves from outside to inside the bounds of this element. Inherited from UIElement.
TouchLeave	Occurs when a touch moves from inside to outside the bounds of this element. Inherited from UIElement.
TouchMove	Occurs when a finger moves on the screen while the finger is over this element. Inherited from UIElement.
TouchUp	Occurs when a finger is raised off of the screen while the finger is over this element. Inherited from UIElement.
UnboundExpressionEditorCreated	Fires after the Expression Editor has been invoked for an unbound column. Inherited from DataViewBase.
Unloaded	Occurs when the element is removed from within an element tree of loaded elements. Inherited from FrameworkElement.
ValidateCell	Allows you to validate the focused cell’s data.
ValidateNode	Allows you to validate node values.
ValidateNodeDeletion	Allows you to validate nodes, check database constraints, and delete nodes from the database before a user deletes a node from the Data Grid.