TreeViewControl Events

The TreeView control.

Name	Description
AutoGeneratedColumns	Not supported in the TreeViewControl.
AutoGeneratingColumn	Not supported in the TreeViewControl.
CanSelectNode	Occurs when a user tries to select a node and allows you to control whether a user can select a particular node.
CanUnselectNode	Occurs when a user tries to unselect a node and allows you to control whether a user can unselect a particular node.
ClipboardNodeCopying	Occurs before a user copies a node to the clipboard. Allows you to apply a format, change the copied data, or skip a node.
ColumnsPopulated	Obsolete. Occurs after the columns have been automatically generated. Inherited from DataControlBase.
CompleteRecordDragDrop	Occurs when a drag-and-drop operation is completed.
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 a user presses the keyboard or mouse buttons during a drag-and-drop operation. The event allows you to cancel this operation depending on the key/button states.
CopyingToClipboard	Occurs when data is copied to the clipboard, allowing you to manually copy required data. Inherited from TreeListControlBase.
CurrentColumnChanged	Occurs after the focused column has been changed. Inherited from DataControlBase.
CurrentItemChanged	Occurs after the focused row has been changed. Inherited from DataControlBase.
CurrentNodeChanged	Occurs after the focused node has been changed.
CustomNodeDisplayText	Allows you to customize the text displayed in nodes.
CustomNodeFilter	Allows you to use custom rules to filter nodes.
CustomNodeSort	Allows you to use custom rules to sort data.
CustomScrollAnimation	Allows you to create a custom animation when TreeViewControl data is vertically scrolled (per-pixel).
CustomUniqueValues	Allows you to specify unique values displayed within a column’s Drop-down Filter. Inherited from DataControlBase.
DataContextChanged	Occurs when the data context for this element changes. Inherited from FrameworkElement.
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 drag-and-drop operation is in progress.
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 user drops a record on the drop target element.
EndSorting	Occurs after the TreeViewControl has completed a sort operation.
FilterChanged	Occurs after the grid’s filter has been changed. Inherited from DataControlBase.
FilterGroupSortChanging	Occurs when group, sort, or filter options are changed. Inherited from DataControlBase.
FocusableChanged	Occurs when the value of the Focusable property changes. Inherited from UIElement.
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 allows you to give feedback to the user.
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.
HiddenEditor	Occurs after a node’s editor is 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.
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.
ItemsSourceChanged	Occurs after the DataControlBase.ItemsSource property has been changed. Inherited from DataControlBase.
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.
NodeCheckStateChanged	Occurs when a node’s check box value is changed.
NodeCollapsed	Occurs after a node is collapsed.
NodeCollapsing	Occurs before a node is collapsed.
NodeDoubleClick	Occurs when a user double-clicks a node.
NodeExpanded	Occurs after a node is expanded.
NodeExpanding	Occurs before a node is expanded.
PastingFromClipboard	Occurs when some information is pasted from the clipboard to the grid. Inherited from DataControlBase.
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.
PropertyChanged	Occurs each time the DataControlBase.VisibleRowCount property has changed its value. Inherited from DataControlBase.
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.
SelectedItemChanged	Occurs after grid’s selection has been changed. Inherited from DataControlBase.
SelectionChanged	Occurs after treelist’s selection has been changed. Inherited from TreeListControlBase.
ShowingEditor	Occurs before a node’s editor is opened. Allows you to prevent the activation of the editor.
ShownEditor	Occurs after a node’s editor is opened.
ShowNodeMenu	Occurs before a user opens a node’s context menu and allows you to customize this menu.
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	Occurs when a drag-and-drop operation is started.
StartSorting	Occurs before the TreeViewControl starts a sort operation.
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.
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.
Unloaded	Occurs when the element is removed from within an element tree of loaded elements. Inherited from FrameworkElement.
ValidateNode	Allows you to validate the focused node’s data and specify whether to close the node’s editor.