![wpf treeview example wpf treeview example](https://www.thebestcsharpprogrammerintheworld.com/wp-content/uploads/2020/05/image_thumb-138.png)
Setting a visual property only has an effect if that property is both present in the control's default template and is set by using a TemplateBinding. The default style is determined by which desktop theme is used when the application is running. If a property is set by a default style, the property might change from its default value when the control appears in the application. To see the parts and states that are specific to the TreeView, see TreeView Styles and Templates.ĭependency properties for this control might be set by the control's default style. For more information about creating a ControlTemplate, see Customizing the Appearance of an Existing Control by Creating a ControlTemplate. You can modify the default ControlTemplate to give the control a unique appearance. To apply the same property settings to multiple TreeView controls, use the Style property. To improve the performance of a TreeView, see How to: Improve the Performance of a TreeView.įor more information about the TreeView control, see the TreeView Overview.Ī TreeView has a limited number of levels. See Optimizing Performance: Controls for more information.
![wpf treeview example wpf treeview example](http://i.stack.imgur.com/fR6xE.png)
Examples of data sources include XmlDataProvider and ObservableCollection objects.ĭisplaying a large number of items may cause performance issues. A TreeView is defined as a hierarchy of TreeViewItem objects.Ī TreeView can populate its tree by binding to a data source and using HierarchicalDataTemplate objects. A TreeViewItem can contain one or more TreeViewItem objects as its descendants.
![wpf treeview example wpf treeview example](https://blog.ctglobalservices.com/wp-content/uploads/old/WPF_TreeView_Example_1.png)
The contents of a TreeView are TreeViewItem controls that can contain rich content, such as Button and Image controls. The following illustration shows a simple TreeView. For more information, see the ItemsControl class. TreeView is an ItemsControl, which means it can contain a collection of objects of any type (such as string, image, or panel).
![wpf treeview example wpf treeview example](http://www.codeproject.com/KB/WPF/TreeViewWithViewModel/SolutionExplorer.png)
Sc#1, 0.004391443, 0.002428215, 0.242281124įor the complete sample, see Styling with ControlTemplates Sample.The following example shows how to create a TreeView. The preceding example uses one or more of the following resources. The following example shows how to define a ControlTemplate for the TreeView control and its associated types. The TreeViewItem is selected but not active. The mouse pointer is positioned over the TreeViewItem. The following table lists the visual states for TreeViewItem control. PartĪ visual element that contains that header content of the TreeView control. The following table lists the named parts for the TreeViewItem control. The Validation.HasError attached property is true has the control does not have focus. The Validation.HasError attached property is true has the control has focus. The control uses the Validation class and the Validation.HasError attached property is false. The following table lists the visual states for the TreeView control. If the ItemsPresenter is not the direct child of the ScrollViewer, you must give the ItemsPresenter the name, ItemsPresenter. (The ItemsPresenter displays each item in the TreeView the ScrollViewer enables scrolling within the control). When you create a ControlTemplate for an TreeView, your template might contain a ItemsPresenter within a ScrollViewer. The TreeView control does not have any named parts. For more information, see Create a template for a control. This topic describes the styles and templates for the TreeView control.