WPF Styles are used to change appearance of any WPF Control. It basically displays a checkbox and image control in the hierarchy. The following code example creates a custom TreeView control by modifying the TreeViewItem control. TreeViewItem2_3.Items.Add(treeViewItem2_3_3) TreeViewItem treeViewItem2_3_3 = new TreeViewItem() TreeViewItem2_3.Items.Add(treeViewItem2_3_2) TreeViewItem treeViewItem2_3_2 = new TreeViewItem() TreeViewItem2_3.Items.Add(treeViewItem2_3_1) TreeViewItem treeViewItem2_3_1 = new TreeViewItem() TreeViewItem treeViewItem2_3 = new TreeViewItem() TreeViewItem2_2.Items.Add(treeViewItem2_2_1) TreeViewItem treeViewItem2_2_1 = new TreeViewItem() TreeViewItem treeViewItem2_2 = new TreeViewItem() TreeViewItem2_1.Header = "Kailash Behera" TreeViewItem treeViewItem2_1 = new TreeViewItem() TreeViewItem1_3.Items.Add(treeViewItem1_3_3) TreeViewItem treeViewItem1_3_3 = new TreeViewItem() TreeViewItem1_3.Items.Add(treeViewItem1_3_2) TreeViewItem treeViewItem1_3_2 = new TreeViewItem() TreeViewItem1_3.Items.Add(treeViewItem1_3_1) TreeViewItem treeViewItem1_3_1 = new TreeViewItem() TreeViewItem treeViewItem1_3 = new TreeViewItem() TreeViewItem1_2.Items.Add(treeViewItem1_2_1) TreeViewItem treeViewItem1_2_1 = new TreeViewItem() TreeViewItem treeViewItem1_2 = new TreeViewItem() TreeViewItem1_1.Header = "Kailash Behera" TreeViewItem treeViewItem1_1 = new TreeViewItem() The following two code example creates a hierarchical TreeView control using XAML and C# code. WPF TreeView Example Hierarchical WPF TreeView TreeViewItem treeViewItem2 = new TreeViewItem() TreeViewItem treeViewItem1 = new TreeViewItem() The following example creates the same TreeView in c# what we have created using the XAML code Like other WPF controls WPF TreeView can also be created at run time using C# code. WPF TreeView Example Create a WPF TreeView using C# The following example creates a simple TreeView using the XAML code. To define the layout of a TreeViewItem control, you can also use HierarchicalDataTemplate objects. The ItemsSource can be specified for TreeView control as a data source and then specify a HeaderTemplate and ItemTemplate to define the TreeViewItem content. If an item is not a TreeViewItem control, it is automatically enclosed by a TreeViewItem control when the TreeView control is displayed. A TreeViewItem control is a HeaderedItemsControl that has a Header and an Item collection. WPF TreeView is an ItemsControl that nests the items by using TreeViewItem controls in a hierarchy structure. We will see a code example of loading XML content into WPF TreeView. This blog introduces the TreeView and demonstrates how to create TreeView, add a child using XAML and C# language. The WPF TreeView control provides a way to display information in a hierarchical structure by using collapsible nodes.
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