Class RadTreeView

A hierarchical control used to display a tree of items.

Inheritance
System.Object
ItemsControl
RadTreeView
RadPanelBar
Inherited Members
Namespace: Telerik.Windows.Controls
Assembly: Telerik.Windows.Controls.Navigation.dll

Syntax

[TelerikToolboxCategory("Navigation")]
public class RadTreeView : ItemsControl, IScrollingServiceCore, IScrollingInfo
Remarks

The RadTreeView control is used to display a list of items. The RadTreeView control supports the following features:

items

The RadTreeView control is made up of tree of items represented by RadTreeViewItem objects. Items at the top level (level 0) are called root items. An item that has a parent item is called a child item. All root items are stored in the Items property of the RadTreeView control. Child items are stored in the Items property of their parent RadTreeViewItem.

Each item has a Header and a Tag property. The value of the Header property is displayed in the RadTreeView control, while the Tag property is used to store any additional data about the item.

Constructors

RadTreeView()

Initializes a new instance of the RadTreeView class.

Declaration
public RadTreeView()
Remarks

Use this constructor to create and initialize a new instance of the RadTreeView control.

Fields

AutoScrollToSelectedItemProperty

Identifies the AutoScrollToSelectedItem property.

Declaration
public static readonly DependencyProperty AutoScrollToSelectedItemProperty
Field Value
System.Windows.DependencyProperty

BringIntoViewModeProperty

Identifies the BringIntoView property.

Declaration
public static readonly DependencyProperty BringIntoViewModeProperty
Field Value
System.Windows.DependencyProperty

CheckedItemsProperty

Identifies the CheckedItemsProperty dependency property.

Declaration
public static readonly DependencyProperty CheckedItemsProperty
Field Value
System.Windows.DependencyProperty

DragEndedEvent

Identifies the DragEnded routed event.

Declaration
public static readonly RoutedEvent DragEndedEvent
Field Value
RoutedEvent

DragOverTreeEvent

Identifies the DragOverTree routed event.

Declaration
public static readonly RoutedEvent DragOverTreeEvent
Field Value
RoutedEvent

DragStartedEvent

Identifies the DragStarted routed event.

Declaration
public static readonly RoutedEvent DragStartedEvent
Field Value
RoutedEvent

DropExpandDelayProperty

Identifies the DropExpandDelay property.

Declaration
public static readonly DependencyProperty DropExpandDelayProperty
Field Value
System.Windows.DependencyProperty

ExpanderStyleProperty

Identifies the ExpanderStyle dependency property.

Declaration
public static readonly DependencyProperty ExpanderStyleProperty
Field Value
System.Windows.DependencyProperty

ImagesBaseDirProperty

Identifies the ImagesBaseDirectory dependency property.

Declaration
public static readonly DependencyProperty ImagesBaseDirProperty
Field Value
System.Windows.DependencyProperty

IsDragDropEnabledProperty

Identifies the IsDragDropEnabled dependency property.

Declaration
public static readonly DependencyProperty IsDragDropEnabledProperty
Field Value
System.Windows.DependencyProperty

IsDragPreviewEnabledProperty

Identifies the IsDragPreviewEnabled dependency property.

Declaration
public static readonly DependencyProperty IsDragPreviewEnabledProperty
Field Value
System.Windows.DependencyProperty

IsDragTooltipEnabledProperty

Identifies the IsDragTooltipEnabled dependency property.

Declaration
public static readonly DependencyProperty IsDragTooltipEnabledProperty
Field Value
System.Windows.DependencyProperty

IsDropPreviewLineEnabledProperty

Identifies the IsDropPreviewLineEnabled dependency property.

Declaration
public static readonly DependencyProperty IsDropPreviewLineEnabledProperty
Field Value
System.Windows.DependencyProperty

IsEditableProperty

Identifies the IsEditable dependency property.

Declaration
public static readonly DependencyProperty IsEditableProperty
Field Value
System.Windows.DependencyProperty

IsExpandOnDblClickEnabledProperty

Identifies the IsExpandOnDoubleClickEnabled dependency property.

Declaration
public static readonly DependencyProperty IsExpandOnDblClickEnabledProperty
Field Value
System.Windows.DependencyProperty

IsExpandOnSingleClickEnabledProperty

Identifies the IsExpandOnSingleClickEnabled dependency property.

Declaration
public static readonly DependencyProperty IsExpandOnSingleClickEnabledProperty
Field Value
System.Windows.DependencyProperty

IsLineEnabledProperty

Identifies the IsLineEnabled dependency property.

Declaration
public static readonly DependencyProperty IsLineEnabledProperty
Field Value
System.Windows.DependencyProperty

IsLoadOnDemandEnabledProperty

Identifies the IsLoadOnDemandEnabled dependency property.

Declaration
public static readonly DependencyProperty IsLoadOnDemandEnabledProperty
Field Value
System.Windows.DependencyProperty

IsOptionElementsEnabledProperty

Identifies the IsOptionElementsEnabled dependency property.

Declaration
public static readonly DependencyProperty IsOptionElementsEnabledProperty
Field Value
System.Windows.DependencyProperty

IsRootLinesEnabledProperty

Identifies the IsRootLinesEnabled dependency property.

Declaration
public static readonly DependencyProperty IsRootLinesEnabledProperty
Field Value
System.Windows.DependencyProperty

IsSingleExpandPathProperty

Identifies the IsSingleExpandPath dependency property.

Declaration
public static readonly DependencyProperty IsSingleExpandPathProperty
Field Value
System.Windows.DependencyProperty

IsTriStateModeProperty

Identifies the IsTriStateMode dependency property.

Declaration
public static readonly DependencyProperty IsTriStateModeProperty
Field Value
System.Windows.DependencyProperty

ItemEditTemplateProperty

Identifies the ItemEditTemplate dependency property.

Declaration
public static readonly DependencyProperty ItemEditTemplateProperty
Field Value
System.Windows.DependencyProperty

ItemEditTemplateSelectorProperty

Identifies the ItemEditTemplateSelector dependency property.

Declaration
public static readonly DependencyProperty ItemEditTemplateSelectorProperty
Field Value
System.Windows.DependencyProperty

ItemsIndentProperty

Identifies the ItemsIndent dependency property.

Declaration
public static readonly DependencyProperty ItemsIndentProperty
Field Value
System.Windows.DependencyProperty

PathSeparatorProperty

Identifies the PathSeparator dependency property.

Declaration
public static readonly DependencyProperty PathSeparatorProperty
Field Value
System.Windows.DependencyProperty

PreviewDragEndedEvent

Identifies the PreviewDragEnded routed event.

Declaration
public static readonly RoutedEvent PreviewDragEndedEvent
Field Value
RoutedEvent

PreviewDragStartedEvent

Identifies the PreviewDragStarted routed event.

Declaration
public static readonly RoutedEvent PreviewDragStartedEvent
Field Value
RoutedEvent

PreviewSelectionChangedEvent

Identifies the PreviewSelectionChanged routed event.

Declaration
public static readonly RoutedEvent PreviewSelectionChangedEvent
Field Value
RoutedEvent

SelectedContainerProperty

Identifies the SelectedContainer property.

Declaration
public static readonly DependencyProperty SelectedContainerProperty
Field Value
System.Windows.DependencyProperty

SelectedItemProperty

Identifies the SelectedItem property.

Declaration
public static readonly DependencyProperty SelectedItemProperty
Field Value
System.Windows.DependencyProperty

SelectedItemsProperty

Identifies the SelectedItemsProperty dependency property.

Declaration
public static readonly DependencyProperty SelectedItemsProperty
Field Value
System.Windows.DependencyProperty

SelectedValuePathProperty

Identifies the SelectedValuePath dependency property.

Declaration
public static readonly DependencyProperty SelectedValuePathProperty
Field Value
System.Windows.DependencyProperty

SelectedValueProperty

Identifies the SelectedValue dependency property.

Declaration
public static readonly DependencyProperty SelectedValueProperty
Field Value
System.Windows.DependencyProperty

SelectionChangedEvent

Identifies the SelectionChanged routed event.

Declaration
public static readonly RoutedEvent SelectionChangedEvent
Field Value
RoutedEvent

SelectionModeProperty

Identifies the SelectionMode dependency property.

Declaration
public static readonly DependencyProperty SelectionModeProperty
Field Value
System.Windows.DependencyProperty

TextDropAfterProperty

Identifies the TextDropAfter dependency property.

Declaration
public static readonly DependencyProperty TextDropAfterProperty
Field Value
System.Windows.DependencyProperty

TextDropBeforeProperty

Identifies the TextDropBefore dependency property.

Declaration
public static readonly DependencyProperty TextDropBeforeProperty
Field Value
System.Windows.DependencyProperty

TextDropInProperty

Identifies the TextDropIn dependency property.

Declaration
public static readonly DependencyProperty TextDropInProperty
Field Value
System.Windows.DependencyProperty

TextDropRootProperty

Identifies the TextDropRoot dependency property.

Declaration
public static readonly DependencyProperty TextDropRootProperty
Field Value
System.Windows.DependencyProperty

Properties

AutoScrollToSelectedItem

Gets or sets a value indicating whether the selected RadTreeViewItem should be scrolled into the viewport. When using virtualization this property works only for realized RadTreeViewItem(s).

Declaration
public bool AutoScrollToSelectedItem { get; set; }
Property Value
System.Boolean

BringIntoViewMode

Gets or sets whether just the item's header should be brought into view when the respective methods are called of the header and its items.

Declaration
public BringIntoViewMode BringIntoViewMode { get; set; }
Property Value
BringIntoViewMode

CheckedItems

Gets a collection containing the items that are currently checked.

Declaration
public ICollection<object> CheckedItems { get; }
Property Value
System.Collections.Generic.ICollection<System.Object>

DropExpandDelay

Gets or sets the time has to pass before an item will be expanded because of something being dragged over it. This is a dependency property.

Declaration
public TimeSpan DropExpandDelay { get; set; }
Property Value
System.TimeSpan

ExpanderStyle

Gets or sets the style of RadTreeViewItem expander button.

Declaration
public Style ExpanderStyle { get; set; }
Property Value
System.Windows.Style

Remarks

The expander button is a ToggleButton. To modify the appearance of the expander first create a Style for a ToggleButton and then set the defined style to this property.

Examples

Following code fragment shows the basic usage.

        <telerik:RadTreeView 
            x:Name="RadTreeView1" 
            ExpanderStyleInherited="{StaticResource MyExpanderStyle}"/>

ImagesBaseDir

Gets or sets the directory where image files used for the TreeView images.

Declaration
public string ImagesBaseDir { get; set; }
Property Value
System.String

IsDragDropEnabled

Gets or sets a value indicating whether drag and drop is enabled.

Declaration
public bool IsDragDropEnabled { get; set; }
Property Value
System.Boolean

IsDragPreviewEnabled

Gets or sets a value indicating whether drag feedback is shown while dragging.

Declaration
public bool IsDragPreviewEnabled { get; set; }
Property Value
System.Boolean

IsDragTooltipEnabled

Gets or sets a value indicating whether drag tooltip is shown while dragging.

Declaration
public bool IsDragTooltipEnabled { get; set; }
Property Value
System.Boolean

IsDropPreviewLineEnabled

Gets or sets a value indicating whether drag outline is shown while dragging.

Declaration
public bool IsDropPreviewLineEnabled { get; set; }
Property Value
System.Boolean

IsEditable

Gets or sets a value indicating whether the user can edit the TreeViewItems.

Declaration
public bool IsEditable { get; set; }
Property Value
System.Boolean

IsEditing

Gets if there is an open editor in the tree view.

Declaration
public virtual bool IsEditing { get; }
Property Value
System.Boolean

IsExpandOnDblClickEnabled

Gets or sets a value whether the item will toggle its expand state on double click.

Declaration
public bool IsExpandOnDblClickEnabled { get; set; }
Property Value
System.Boolean

IsExpandOnSingleClickEnabled

Gets or sets a value indicating whether the item will toggle its expand state on single click.

Declaration
public bool IsExpandOnSingleClickEnabled { get; set; }
Property Value
System.Boolean

IsLineEnabled

Gets or sets a value indicating whether connecting lines are displayed.

Declaration
public bool IsLineEnabled { get; set; }
Property Value
System.Boolean

IsLoaded

Gets a value determine whether the Loaded event has been fired or not.

Declaration
public bool IsLoaded { get; }
Property Value
System.Boolean

Returns true if loaded event has been rised.

IsLoadOnDemandEnabled

Gets or sets a value indicating whether loading on demand is enabled.

Declaration
public bool IsLoadOnDemandEnabled { get; set; }
Property Value
System.Boolean

Remarks

When the value is set to true the expander visual will be visible even if the item do no have children. When the expander visual is clicked, the LoadOnDemand event is raised and you can populate the node.

IsOptionElementsEnabled

Gets or sets a value indicating whether checkboxes/radio buttons are displayed besides the TreeViewItems.

Declaration
public bool IsOptionElementsEnabled { get; set; }
Property Value
System.Boolean

IsRootLinesEnabled

Gets or sets a value indicating whether lines are displayed next to root item.

Declaration
public bool IsRootLinesEnabled { get; set; }
Property Value
System.Boolean

IsSingleExpandPath

Gets a value indicating whether only one branch of the TreeView will be expanded.

Declaration
public bool IsSingleExpandPath { get; set; }
Property Value
System.Boolean

Remarks

The property closes all item that are not parents of the last expanded item.

IsTriStateMode

Gets or sets a value indicating whether tri state mode for the checkboxes in the option lists is enabled.

Declaration
public bool IsTriStateMode { get; set; }
Property Value
System.Boolean

Remarks

When the value is set to true the checked state of the item depends on the checked state of its child items. When the checked state of the item is changed - the child items state is also changed.

IsVirtualizing

Gets or sets a value indicating whether the TreeView should virtualize its items. Virtualization should be used only when the TreeView is data bound.

Declaration
public bool IsVirtualizing { get; set; }
Property Value
System.Boolean

Remarks

This is a CLR wrapper for the TreeViewPanel.IsVirtualizing property. It will only work if the ItemsPanel of the TreeViewItem is a TreeViewPanel.

ItemEditTemplate

Gets or sets the template that the items will display when edited.

Declaration
public DataTemplate ItemEditTemplate { get; set; }
Property Value
System.Windows.DataTemplate

The item edit template.

ItemEditTemplateSelector

Gets or sets the template selector that the items will use to select a template to display when edited.

Declaration
public DataTemplateSelector ItemEditTemplateSelector { get; set; }
Property Value
DataTemplateSelector

The item edit template selector.

ItemsIndent

Gets or sets the distance that each tree item level will be indented.

Declaration
public int ItemsIndent { get; set; }
Property Value
System.Int32

PathSeparator

Gets or sets the delimiter string that the tree item path uses.

Declaration
public string PathSeparator { get; set; }
Property Value
System.String

Remarks

The tree item path contains of a set of tree item labels separated by the PathSeparator delimiter strings.
The default return value is the backslash character ().

ScrollViewer

Gets the ScrollViewer control the is inside the RadTreeView.

Declaration
public ScrollViewer ScrollViewer { get; }
Property Value
System.Windows.Controls.ScrollViewer

Remarks

Use the ScrollViewer.HorizontalScrollBarVisibility and ScrollViewer.VerticalScrollBarVisibility attached properties to set the visibility of the ScrollBars.

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        ms:ScrollViewer.HorizontalScrollBarVisibility="Visible"
        ms:ScrollViewer.VerticalScrollBarVisibility="Visible"/>

SelectedContainer

Gets the TreeViewItem container that is currently selected. This is a dependency property.

Declaration
public RadTreeViewItem SelectedContainer { get; }
Property Value
RadTreeViewItem

SelectedItem

Gets or sets the item that is currently selected. This is a dependency property.

Declaration
public object SelectedItem { get; set; }
Property Value
System.Object

SelectedItems

Gets a collection containing the items that are currently selected.

Declaration
public ObservableCollection<object> SelectedItems { get; }
Property Value
System.Collections.ObjectModel.ObservableCollection<System.Object>

SelectedValue

Gets or sets the value of the SelectedItem, obtained by using SelectedValuePath.

Declaration
public object SelectedValue { get; }
Property Value
System.Object

SelectedValuePath

Gets or sets the path that is used to extract the SelectedValue from the SelectedItem.

Declaration
public string SelectedValuePath { get; set; }
Property Value
System.String

SelectionMode

Gets or sets the selection mode.

Declaration
public SelectionMode SelectionMode { get; set; }
Property Value
SelectionMode

TextDropAfter

Gets or sets the text "Drop after" text of the drag preview.

Declaration
public string TextDropAfter { get; set; }
Property Value
System.String

The text drop after.

TextDropBefore

Gets or sets the text "Drop before" text of the drag preview.

Declaration
public string TextDropBefore { get; set; }
Property Value
System.String

The text drop before.

TextDropIn

Gets or sets the text for "Drop in" text of the drag preview.

Declaration
public string TextDropIn { get; set; }
Property Value
System.String

The text drop in.

TextDropRoot

Gets or sets the text that appears when an item is dropped in an empty TreeView.

Declaration
public string TextDropRoot { get; set; }
Property Value
System.String

The text drop in.

Methods

add_DragEnded(RadTreeViewDragEndedEventHandler)

Declaration
public void add_DragEnded(RadTreeViewDragEndedEventHandler value)
Parameters
RadTreeViewDragEndedEventHandler value

add_DragOverTree(DragOverTreeEventHandler)

Declaration
public void add_DragOverTree(DragOverTreeEventHandler value)
Parameters
DragOverTreeEventHandler value

add_DragStarted(RadTreeViewDragEventHandler)

Declaration
public void add_DragStarted(RadTreeViewDragEventHandler value)
Parameters
RadTreeViewDragEventHandler value

add_EditCanceled(RadTreeViewItemEditedEventHandler)

Declaration
public void add_EditCanceled(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_Edited(RadTreeViewItemEditedEventHandler)

Declaration
public void add_Edited(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_EditStarted(RadTreeViewItemEditedEventHandler)

Declaration
public void add_EditStarted(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_PreviewDragEnded(RadTreeViewDragEndedEventHandler)

Declaration
public void add_PreviewDragEnded(RadTreeViewDragEndedEventHandler value)
Parameters
RadTreeViewDragEndedEventHandler value

add_PreviewDragStarted(RadTreeViewDragEventHandler)

Declaration
public void add_PreviewDragStarted(RadTreeViewDragEventHandler value)
Parameters
RadTreeViewDragEventHandler value

add_PreviewEditCanceled(RadTreeViewItemEditedEventHandler)

Declaration
public void add_PreviewEditCanceled(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_PreviewEdited(RadTreeViewItemEditedEventHandler)

Declaration
public void add_PreviewEdited(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_PreviewEditStarted(RadTreeViewItemEditedEventHandler)

Declaration
public void add_PreviewEditStarted(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

add_PreviewSelectionChanged(SelectionChangedEventHandler)

Declaration
public void add_PreviewSelectionChanged(SelectionChangedEventHandler value)
Parameters
SelectionChangedEventHandler value

add_SelectionChanged(SelectionChangedEventHandler)

Declaration
public void add_SelectionChanged(SelectionChangedEventHandler value)
Parameters
SelectionChangedEventHandler value

AddItemByPath(String)

Creates a new item and adds a item by path. Can be used if the TreeView is not data bound.

Declaration
public RadTreeViewItem AddItemByPath(string path)
Parameters
System.String path

Where the item should be added.
Returns
RadTreeViewItem

The new item if the operation is successful.

AddItemByPath(String, String)

Creates a new item and adds a item by path. The label of the new item will be the text after the last separator.

Declaration
public RadTreeViewItem AddItemByPath(string path, string separator)
Parameters
System.String path

Where the item should be added.
System.String separator

The path separator.
Returns
RadTreeViewItem

The new item if the operation is successful.

AddItemsByPath(String, String)

Adds an item at the given path, given that the TreeView is not bound.

Declaration
public RadTreeViewItem AddItemsByPath(string path, string separator)
Parameters
System.String path

The path to create an item at.
System.String separator

The path separator.
Returns
RadTreeViewItem

The newly created RadTreeViewItem.

BringIndexIntoView(Int32)

Brings the item with the given index into view. The method will not work before the item containers have been generated.

Declaration
public void BringIndexIntoView(int index)
Parameters
System.Int32 index

The index of the item to be brought into view.

BringIndexIntoView(Int32, Point)

Brings the item with the given index into view. The method will not work before the item containers have been generated.

Declaration
public void BringIndexIntoView(int index, Point offset)
Parameters
System.Int32 index

The index of the item to be brought into view.
System.Windows.Point offset

The offset to tree view top left corner where the item should be scrolled to.

BringItemIntoView(Object)

Brings the given item into view. This is not a recursive method, it will only work for immediate items. The method will not work before the item containers have been generated.

Declaration
public void BringItemIntoView(object item)
Parameters
System.Object item

The item to be brought into view.

BringItemIntoView(Object, Point)

Brings the given item into view. This is not a recursive method, it will only work for immediate items. The method will not work before the item containers have been generated.

Declaration
public void BringItemIntoView(object item, Point offset)
Parameters
System.Object item

The item to be brought into view.
System.Windows.Point offset

The offset to tree view top left corner where the item should be scrolled to.

BringPathIntoView(String)

Brings an item into view. Works recursively for nested containers. If the Loaded event has not been fired yet the method will be scheduled for execution after the Loaded event. The method will realize the required containers if they are not yet created.

Declaration
public void BringPathIntoView(string path)
Parameters
System.String path

The path of the item to be brought into view.

BringPathIntoView(String, Point)

Brings an item into view. Works recursively for nested containers. If the Loaded event has not been fired yet the method will be scheduled for execution after the Loaded event. The method will realize the required containers if they are not yet created.

Declaration
public void BringPathIntoView(string path, Point offset)
Parameters
System.String path

The path of the item to be brought into view.
System.Windows.Point offset

The offset from the top left corner of the tree where the item will be scrolled to.

ClearContainerForItemOverride(DependencyObject, Object)

Declaration
protected override void ClearContainerForItemOverride(DependencyObject element, object item)
Parameters
System.Windows.DependencyObject element

System.Object item

CollapseAll()

Collapses all items recursively.

Declaration
public void CollapseAll()

ContainerFromItemRecursive(Object)

Recursively searches the tree view in the tree to get an item container (RadTreeViewItem) for the particular data item.

Declaration
public RadTreeViewItem ContainerFromItemRecursive(object item)
Parameters
System.Object item

Returns
RadTreeViewItem

CreateDragVisualContent(IList<Object>)

Creates default drag visual content - snapshot of all dragged items. Override this method in subclass in order to change the default drag visual content.

Declaration
protected virtual object CreateDragVisualContent(IList<object> draggedItems)
Parameters
System.Collections.Generic.IList<System.Object> draggedItems

Returns
System.Object

ExpandAll()

Expands all items recursively.

Declaration
public void ExpandAll()
Remarks

If a child item is not generated it will be expanded once it is generated.

ExpandItemByPath(String)

Expands to an item with a given path.

Declaration
public void ExpandItemByPath(string path)
Parameters
System.String path

The path to an item.

ExpandItemByPath(String, String)

Expands to an item with a given path.

Declaration
public void ExpandItemByPath(string path, string separator)
Parameters
System.String path

The path to an item.
System.String separator

The separator for the path.

GetContainerForItemOverride()

Declaration
protected override DependencyObject GetContainerForItemOverride()
Returns
System.Windows.DependencyObject

GetItemByPath(String)

Gets a item by specifying a path to it.

Declaration
public RadTreeViewItem GetItemByPath(string path)
Parameters
System.String path

The path to the item.
Returns
RadTreeViewItem

The item if found.

GetItemByPath(String, String)

Gets a item by specifying a path to it.

Declaration
public RadTreeViewItem GetItemByPath(string path, string separator)
Parameters
System.String path

The path to the item.
System.String separator

The path separator.
Returns
RadTreeViewItem

The item if found.

HideBetweenItemsDragCue()

Hides the drag cue that appears when a drop between two items is possible.

Declaration
public void HideBetweenItemsDragCue()

IsItemItsOwnContainerOverride(Object)

Declaration
protected override bool IsItemItsOwnContainerOverride(object item)
Parameters
System.Object item

Returns
System.Boolean

OnApplyTemplate()

When overridden in a derived class, is invoked whenever application code or internal processes (such as a rebuilding layout pass) call System.Windows.Controls.Control.ApplyTemplate.

Declaration
public override void OnApplyTemplate()
Overrides

OnCreateAutomationPeer()

Declaration
protected override AutomationPeer OnCreateAutomationPeer()
Returns
System.Windows.Automation.Peers.AutomationPeer

OnDragEnded(RadTreeViewDragEndedEventArgs)

Raises the DragEnded event.

Declaration
protected virtual void OnDragEnded(RadTreeViewDragEndedEventArgs e)
Parameters
RadTreeViewDragEndedEventArgs e

The RadTreeViewDragEndedEventArgs instance containing the event data.

OnDragEnter(DragEventArgs)

Called when DragEnter Event is Raise.

Declaration
protected override void OnDragEnter(DragEventArgs e)
Parameters
System.Windows.DragEventArgs e

Event args.

OnDragLeave(DragEventArgs)

Called when DragEnter Event is Raise.

Declaration
protected override void OnDragLeave(DragEventArgs e)
Parameters
System.Windows.DragEventArgs e

Event args.

OnDragOverTree(DragOverTreeEventArgs)

Raises the DragOverTree event.

Declaration
protected virtual void OnDragOverTree(DragOverTreeEventArgs e)
Parameters
DragOverTreeEventArgs e

The DragOverTreeEventArgs instance containing the event data.

OnDragStarted(RadTreeViewDragEventArgs)

Raises the DragStarted event.

Declaration
protected virtual void OnDragStarted(RadTreeViewDragEventArgs e)
Parameters
RadTreeViewDragEventArgs e

The RadTreeViewDragEventArgs instance containing the event data.

OnDrop(DragEventArgs)

Called when DragEnter Event is Raise.

Declaration
protected override void OnDrop(DragEventArgs e)
Parameters
System.Windows.DragEventArgs e

Event args.

OnExpanderStyleChanged(Style, Style)

Propagates the changed expander style through tree's children. Called when the ExpanderStyleInherited property changes.

Declaration
protected virtual void OnExpanderStyleChanged(Style oldStyle, Style newStyle)
Parameters
System.Windows.Style oldStyle

The old style.
System.Windows.Style newStyle

The new style.

OnGotFocus(Object, RoutedEventArgs)

Called when the TreeView or one of its items receive focus.

Declaration
protected virtual void OnGotFocus(object sender, RoutedEventArgs e)
Parameters
System.Object sender

The sender of the event.
System.Windows.RoutedEventArgs e

The event arguments that will be passed to the GotFocus event.

OnItemPrepared(RadTreeViewItemPreparedEventArgs)

Raises the DragEnded event.

Declaration
protected virtual void OnItemPrepared(RadTreeViewItemPreparedEventArgs e)
Parameters
RadTreeViewItemPreparedEventArgs e

The RadTreeViewDragEndedEventArgs instance containing the event data.

OnItemsChanged(NotifyCollectionChangedEventArgs)

Called when the value of the System.Windows.Controls.ItemsControl.Items property changes.

Declaration
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
Parameters
System.Collections.Specialized.NotifyCollectionChangedEventArgs e

A System.Collections.Specialized.NotifyCollectionChangedEventArgs that contains the event data.
Overrides

OnLostFocus(Object, RoutedEventArgs)

Called when the TreeView or one of its items lose focus.

Declaration
protected virtual void OnLostFocus(object sender, RoutedEventArgs e)
Parameters
System.Object sender

The sender of the event.
System.Windows.RoutedEventArgs e

The event arguments that are passed to the LostFocus event.

OnMouseLeftButtonDown(MouseButtonEventArgs)

Declaration
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
Parameters
System.Windows.Input.MouseButtonEventArgs e

OnMouseWheel(MouseWheelEventArgs)

Declaration
protected override void OnMouseWheel(MouseWheelEventArgs e)
Parameters
System.Windows.Input.MouseWheelEventArgs e

OnPreviewDragEnded(RadTreeViewDragEndedEventArgs)

Raises the PreviewDragEnded event.

Declaration
protected virtual bool OnPreviewDragEnded(RadTreeViewDragEndedEventArgs e)
Parameters
RadTreeViewDragEndedEventArgs e

The RadTreeViewDragEndedEventArgs instance containing the event data.
Returns
System.Boolean

OnPreviewDragStarted(RadTreeViewDragEventArgs)

Raises the PreviewDragStarted event.

Declaration
protected virtual bool OnPreviewDragStarted(RadTreeViewDragEventArgs e)
Parameters
RadTreeViewDragEventArgs e

The RadTreeViewDragEventArgs instance containing the event data.
Returns
System.Boolean

OnPreviewSelectionChanged(SelectionChangedEventArgs)

This method is called when the PreviewSelectionChanged is raised.

Declaration
protected virtual bool OnPreviewSelectionChanged(SelectionChangedEventArgs e)
Parameters
SelectionChangedEventArgs e

The event arguments with which the event will be called.
Returns
System.Boolean

Returns whether the event was handled.
Remarks

Not calling the base method in overrides means that the PreviewSelectionChanged event will not be raised.

OnSelectionChanged(SelectionChangedEventArgs)

Raises the SelectionChanged event.

Declaration
protected virtual void OnSelectionChanged(SelectionChangedEventArgs e)
Parameters
SelectionChangedEventArgs e

The SelectionChangedEventArgs instance containing the event data.

PrepareContainerForItemOverride(DependencyObject, Object)

Prepares the specified element to display the specified item.

Declaration
protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
Parameters
System.Windows.DependencyObject element

Element used to display the specified item.
System.Object item

Specified item.
Overrides

remove_DragEnded(RadTreeViewDragEndedEventHandler)

Declaration
public void remove_DragEnded(RadTreeViewDragEndedEventHandler value)
Parameters
RadTreeViewDragEndedEventHandler value

remove_DragOverTree(DragOverTreeEventHandler)

Declaration
public void remove_DragOverTree(DragOverTreeEventHandler value)
Parameters
DragOverTreeEventHandler value

remove_DragStarted(RadTreeViewDragEventHandler)

Declaration
public void remove_DragStarted(RadTreeViewDragEventHandler value)
Parameters
RadTreeViewDragEventHandler value

remove_EditCanceled(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_EditCanceled(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_Edited(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_Edited(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_EditStarted(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_EditStarted(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_PreviewDragEnded(RadTreeViewDragEndedEventHandler)

Declaration
public void remove_PreviewDragEnded(RadTreeViewDragEndedEventHandler value)
Parameters
RadTreeViewDragEndedEventHandler value

remove_PreviewDragStarted(RadTreeViewDragEventHandler)

Declaration
public void remove_PreviewDragStarted(RadTreeViewDragEventHandler value)
Parameters
RadTreeViewDragEventHandler value

remove_PreviewEditCanceled(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_PreviewEditCanceled(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_PreviewEdited(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_PreviewEdited(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_PreviewEditStarted(RadTreeViewItemEditedEventHandler)

Declaration
public void remove_PreviewEditStarted(RadTreeViewItemEditedEventHandler value)
Parameters
RadTreeViewItemEditedEventHandler value

remove_PreviewSelectionChanged(SelectionChangedEventHandler)

Declaration
public void remove_PreviewSelectionChanged(SelectionChangedEventHandler value)
Parameters
SelectionChangedEventHandler value

remove_SelectionChanged(SelectionChangedEventHandler)

Declaration
public void remove_SelectionChanged(SelectionChangedEventHandler value)
Parameters
SelectionChangedEventHandler value

SelectItemByPath(String)

Adds the item with the given path to the collection of selected items. The path separator is "&quot;.

Declaration
public void SelectItemByPath(string path)
Parameters
System.String path

A unique path for the item, normally made up of IDs.

SelectItemByPath(String, String)

Adds the item with the given path to the collection of selected items. The path separator is "&quot;.

Declaration
public void SelectItemByPath(string path, string separator)
Parameters
System.String path

A unique path for the item, normally made up of IDs.
System.String separator

The string separating the path elements, for example "&quot;.

ShowBetweenItemsDragCue(RadTreeViewItem)

Shows the DragCue that appears when a drop between two items is possible.

Declaration
public void ShowBetweenItemsDragCue(RadTreeViewItem dropDestination)
Parameters
RadTreeViewItem dropDestination

The relative drop position. In this method only DropPosition.Before and DropPosition.After make sense.

UpdateDropPreviewLine(RadTreeViewItem, DropPosition)

Updates the drop preview line position and visibility while dragging.

Declaration
public void UpdateDropPreviewLine(RadTreeViewItem dropDestination, DropPosition dropPosition)
Parameters
RadTreeViewItem dropDestination

DropPosition dropPosition

Events

Checked

Occurs when a child TreeView item has been checked.

Declaration
public event EventHandler<RadRoutedEventArgs> Checked
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Checked="RadTreeView1_Checked"/>
       void RadTreeView1_Checked(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been checked
           RadTreeViewItem checkedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

Collapsed

Occurs when a child TreeView item has been collapsed.

Declaration
public event EventHandler<RadRoutedEventArgs> Collapsed
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Collapsed="RadTreeView1_Collapsed"/>
       void RadTreeView1_Collapsed(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been collapsed
           RadTreeViewItem collapsedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

DragEnded

Occurs when the drag has ended.

Declaration
public event RadTreeViewDragEndedEventHandler DragEnded
Event Type
RadTreeViewDragEndedEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        DragEnded="RadTreeView1_DragEnded"/>
       void private void RadTreeView1_DragEnded(object sender, RadTreeViewDragEventArgs e)
       {
           // get a reference to the items that has been dragged
           Collection<object> draggedItems = e.DraggedItems;
       }

DragOverTree

Occurs when the dragging over the tree view.

Declaration
public event DragOverTreeEventHandler DragOverTree
Event Type
DragOverTreeEventHandler

DragStarted

Occurs when the drag has started.

Declaration
public event RadTreeViewDragEventHandler DragStarted
Event Type
RadTreeViewDragEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        DragStarted="RadTreeView1_DragStarted"/>
       void private void RadTreeView1_DragStarted(object sender, RadTreeViewDragEventArgs e)
       {
           // get a reference to the items that has been dragged
           Collection<object> draggedItems = e.DraggedItems;
       }

EditCanceled

Raised when item editing has been canceled. This is a wrapper for the EditableHeaderedItemsControl.EditCanceled routed event.

Declaration
public event RadTreeViewItemEditedEventHandler EditCanceled
Event Type
RadTreeViewItemEditedEventHandler

Edited

Raised when the edit of an item has been committed.

Declaration
public event RadTreeViewItemEditedEventHandler Edited
Event Type
RadTreeViewItemEditedEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Edited="RadTreeView1_Edited"/>
       void RadTreeView1_Edited(object sender, RadTreeViewItemEditedEventArgs e)
       {
           // get a reference to the item that has been edited
           RadTreeViewItem editedItem = e.Source as RadTreeViewItem;

           string newText = e.NewText;
           string oldText = e.OldText;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

EditStarted

Raised when the edit of an item has just started. This is a wrapper for the EditableHeaderedItemsControl.EditStarted routed event.

Declaration
public event RadTreeViewItemEditedEventHandler EditStarted
Event Type
RadTreeViewItemEditedEventHandler

Expanded

Occurs when a child TreeView item has been expanded.

Declaration
public event EventHandler<RadRoutedEventArgs> Expanded
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Expanded="RadTreeView1_Expanded"/>
       void RadTreeView1_Expanded(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been expanded
           RadTreeViewItem expandedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

ItemClick

Occurs when a child TreeView item has been clicked.

Declaration
public event EventHandler<RadRoutedEventArgs> ItemClick
Event Type
System.EventHandler<RadRoutedEventArgs>

ItemDoubleClick

Occurs when a child TreeView item has been double clicked.

Declaration
public event EventHandler<RadRoutedEventArgs> ItemDoubleClick
Event Type
System.EventHandler<RadRoutedEventArgs>

ItemPrepared

Occurs when a child RadTreeViewItem has been prepared and is ready for use.

Declaration
public event EventHandler<RadTreeViewItemPreparedEventArgs> ItemPrepared
Event Type
System.EventHandler<RadTreeViewItemPreparedEventArgs>

Remarks

Use it to perform binding of RadTreeViewItem properties to the data objects.

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        ItemPrepared="RadTreeView1_ItemPrepared"/>
       void RadTreeView1_ItemPrepared(object sender, RadTreeViewItemPreparedEventArgs e)
       {
           // get a reference to the item that has been selected
           RadTreeViewItem preparedItem = e.PreparedItem as RadTreeViewItem;

        // do something with this item
        preparedItem.IsSelected = (preparedItem.Item is MyCustomBussinesObject);
       }

LoadOnDemand

Occurs when a child TreeView item is loading its child items on demand. See the IsLoadOnDemandEnabled property.

Declaration
public event EventHandler<RadRoutedEventArgs> LoadOnDemand
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        LoadOnDemand="RadTreeView1_LoadOnDemand"/>
       void RadTreeView1_LoadOnDemand(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that is loading on demand
           RadTreeViewItem loadOnDemandItem = e.Source as RadTreeViewItem;

           // get the data for the new items
           // from web services or from another data set
           // of just create them declaratively like that:
           RadTreeViewItem newItem = new RadTreeViewItem();
           newItem.Header = "New Item";

           // add the new item(s) as a childs of the item that is loading on demand
           loadOnDemandItem.Items.Add(newItem);

           // if there are not items to add you can skip the loading animation
           // by setting the IsLoadingOnDemand property to false
           loadOnDemandItem.IsLoadingOnDemand = false;

           // if there are no items to add at this moment and you want to 
           // stop the LoadOnDemand event from firing again set 
           loadOnDemandItem.IsLoadOnDemandEnabled = false;
       }

PreviewChecked

Occurs before a child TreeView item is checked.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewChecked
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewChecked="RadTreeView1_PreviewChecked"/>
       void private void RadTreeView1_PreviewChecked(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be checked
           RadTreeViewItem itemToCheck = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewCollapsed

Occurs before a child TreeView item is collapsed.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewCollapsed
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewCollapsed="RadTreeView1_PreviewCollapsed"/>
       void private void RadTreeView1_PreviewCollapsed(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be collapsed
           RadTreeViewItem itemToCollapse = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewDragEnded

Occurs before the drag has been ended.

Declaration
public event RadTreeViewDragEndedEventHandler PreviewDragEnded
Event Type
RadTreeViewDragEndedEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewDragEnded="RadTreeView1_PreviewDragEnded"/>
       void private void RadTreeView1_PreviewDragEnded(object sender, RadTreeViewDragEventArgs e)
       {
           // get a reference to the items that has been dragged
           Collection<object> draggedItems = e.DraggedItems;
       }

PreviewDragStarted

Occurs before the drag is started.

Declaration
public event RadTreeViewDragEventHandler PreviewDragStarted
Event Type
RadTreeViewDragEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewDragStarted="RadTreeView1_PreviewDragStarted"/>
       void private void RadTreeView1_PreviewDragStarted(object sender, RadTreeViewDragEventArgs e)
       {
           // get a reference to the items that has been dragged
           Collection<object> draggedItems = e.DraggedItems;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewEditCanceled

Raised just before item editing has been canceled. This is a wrapper for the EditableHeaderedItemsControl.PreviewEditCanceled routed event.

Declaration
public event RadTreeViewItemEditedEventHandler PreviewEditCanceled
Event Type
RadTreeViewItemEditedEventHandler

PreviewEdited

Occurs before a TreeView item to accept the new Edited data.

Declaration
public event RadTreeViewItemEditedEventHandler PreviewEdited
Event Type
RadTreeViewItemEditedEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewEdited="RadTreeView1_PreviewEdited"/>
       void private void RadTreeView1_PreviewEdited(object sender, RadTreeViewItemEditedEventArgs e)
       {
           // get a reference to the item that is being edited
           RadTreeViewItem editedItem = e.Source as RadTreeViewItem;

           string newText = e.NewText;
           string oldText = e.OldText;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewEditStarted

Raised just before editing of an item has started. This is a wrapper for the EditableHeaderedItemsControl.PreviewEditStarted routed event.

Declaration
public event RadTreeViewItemEditedEventHandler PreviewEditStarted
Event Type
RadTreeViewItemEditedEventHandler

PreviewExpanded

Occurs before a child TreeView item is expanded.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewExpanded
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewExpanded="RadTreeView1_PreviewExpanded"/>
       void private void RadTreeView1_PreviewExpanded(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be expanded
           RadTreeViewItem itemToExpand = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewSelected

Occurs before a child tree view item is selected.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewSelected
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewSelected="RadTreeView1_PreviewSelected"/>
       void private void RadTreeView1_PreviewSelected(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be selected
           RadTreeViewItem itemToSelect = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewSelectionChanged

Raised just before the selected items collection has changed.

Declaration
public event SelectionChangedEventHandler PreviewSelectionChanged
Event Type
SelectionChangedEventHandler

PreviewUnchecked

Occurs before a child TreeView item is unchecked.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewUnchecked
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewUnchecked="RadTreeView1_PreviewUnchecked"/>
       void private void RadTreeView1_PreviewUnchecked(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be unchecked
           RadTreeViewItem itemToUncheck = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

PreviewUnselected

Occurs before a child tree view item is unselected.

Declaration
public event EventHandler<RadRoutedEventArgs> PreviewUnselected
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        PreviewUnselected="RadTreeView1_PreviewUnselected"/>
       void private void RadTreeView1_PreviewUnselected(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that will be unselected
           RadTreeViewItem itemToUnselect = e.Source as RadTreeViewItem;

           // if the action should be canceled set Handled property to true
           e.Handled = true;
       }

Selected

Occurs when a child RadTreeView item has been selected.

Declaration
public event EventHandler<RadRoutedEventArgs> Selected
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Selected="RadTreeView1_Selected"/>
       void RadTreeView1_Selected(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been selected
           RadTreeViewItem newSelectedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);

           // get a reference to the selected data item of the TreeView
           object selectedItem = treeView.SelectedItem;

           // get a reference to the selected item container of the Treeview
           RadTreeViewItem selectedItemContainer = treeView.SelectedContainer;
       }

SelectionChanged

Occurs after the value of the SelectedItems property of a tree is changed.

Declaration
public event SelectionChangedEventHandler SelectionChanged
Event Type
SelectionChangedEventHandler

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        SelectionChanged="RadTreeView1_SelectionChanged"/>
       void RadTreeView1_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
       {
           // get a reference to the item that has been selected
           RadTreeViewItem newSelectedItem = e.Source as RadTreeViewItem;

           // get the list of the added items to selection
           IList addedItems = e.AddedItems;

           // get the list of the removed items from the selection
           IList removedItems = e.RemovedItems;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

Unchecked

Occurs when a child TreeView item has been unchecked.

Declaration
public event EventHandler<RadRoutedEventArgs> Unchecked
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Unchecked="RadTreeView1_Unchecked"/>
       void RadTreeView1_Unchecked(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been unchecked
           RadTreeViewItem uncheckedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

Unselected

Occurs when a child tree view item has been unselected.

Declaration
public event EventHandler<RadRoutedEventArgs> Unselected
Event Type
System.EventHandler<RadRoutedEventArgs>

Examples

Following code fragment shows the basic usage.

    <telerik:RadTreeView 
        x:Name="RadTreeView1" 
        Unselected="RadTreeView1_Unselected"/>
       void RadTreeView1_Unselected(object sender, RadRoutedEventArgs e)
       {
           // get a reference to the item that has been unselected
           RadTreeViewItem unselectedItem = e.Source as RadTreeViewItem;

           // get a reference to the RadTreeView
           RadTreeView treeView = (sender as RadTreeView);
       }

Explicit Interface Implementations

IScrollingInfo.ExtentHeight

Gets the height of the extent.

Declaration
double IScrollingInfo.ExtentHeight { get; }
Returns
System.Double

The height of the extent.
Implements

IScrollingInfo.ExtentWidth

Gets the width of the extent.

Declaration
double IScrollingInfo.ExtentWidth { get; }
Returns
System.Double

The width of the extent.
Implements

IScrollingInfo.HorizontalOffset

Gets the horizontal offset.

Declaration
double IScrollingInfo.HorizontalOffset { get; }
Returns
System.Double

The horizontal offset.
Implements

IScrollingInfo.TransformFromDropTargetToViewPort(Point)

Calculate the mouse position relative to the drop element.

Declaration
Point IScrollingInfo.TransformFromDropTargetToViewPort(Point positionInDropTarget)
Parameters
System.Windows.Point positionInDropTarget

DragDrop related data.
Returns
System.Windows.Point

Relative DragPoint.
Implements

IScrollingInfo.VerticalOffset

Gets the vertical offset.

Declaration
double IScrollingInfo.VerticalOffset { get; }
Returns
System.Double

The vertical offset.
Implements

IScrollingInfo.ViewportHeight

Gets the height of the viewport.

Declaration
double IScrollingInfo.ViewportHeight { get; }
Returns
System.Double

The height of the viewport.
Implements

IScrollingInfo.ViewportWidth

Gets the width of the viewport.

Declaration
double IScrollingInfo.ViewportWidth { get; }
Returns
System.Double

The width of the viewport.
Implements

IScrollingServiceCore.ScrollHorizontal(Double)

Scrolls the horizontal to the given offset.

Declaration
void IScrollingServiceCore.ScrollHorizontal(double offsetX)
Parameters
System.Double offsetX

The offset X.
Implements

IScrollingServiceCore.ScrollVertical(Double)

Scrolls the vertical to the given offset.

Declaration
void IScrollingServiceCore.ScrollVertical(double offsetY)
Parameters
System.Double offsetY

The offset Y.
Implements

Extension Methods