Hierarchical TreeView in WPF

Introduction

Bellow code example contains Hierarchical tree view

XAML Code

<TreeView.ItemTemplate>

<HierarchicalDataTemplate.ItemTemplate>

<HierarchicalDataTemplate.ItemTemplate >

</HierarchicalDataTemplate>

</HierarchicalDataTemplate.ItemTemplate>

</HierarchicalDataTemplate>

</HierarchicalDataTemplate.ItemTemplate>

</HierarchicalDataTemplate>

</TreeView.ItemTemplate>

</TreeView>

Code to bind items with treeview

C# Code

private void Window_Loaded_1(object sender, RoutedEventArgs e)

{

List<Employee> emps = new List<Employee>();

emps.Add(new Employee() { ID = 1, Name = "Kailash1" });

emps.Add(new Employee() { ID = 2, Name = "Kailash2" });

emps.Add(new Employee() { ID = 3, Name = "Kailash3" });

emps.Add(new Employee() { ID = 4, Name = "Kailas4" });

emps.Add(new Employee() { ID = 5, Name = "Kailas5" });

Employee emp1 = new Employee();

emp1.Name = "Juniors16";

emp1.Juniors1 = new List<Employee>();

emp1.Juniors1.Add(new Employee() { ID = 113, Name = "Juniors113" });

emp1.Juniors1.Add(new Employee() { ID = 123, Name = "Juniors123" });

emp1.Juniors1.Add(new Employee() { ID = 133, Name = "Juniors133" });

emp1.Juniors1.Add(new Employee() { ID = 143, Name = "Juniors143" });

emp1.Juniors1.Add(new Employee() { ID = 153, Name = "Juniors153" });

Employee emp = new Employee();

emp.Name = "Kailash6";

emp.Juniors1 = new List<Employee>();

emp.Juniors1.Add(new Employee() { ID = 11, Name = "Juniors11" });

emp.Juniors1.Add(new Employee() { ID = 12, Name = "Juniors12" });

emp.Juniors1.Add(new Employee() { ID = 13, Name = "Juniors13" });

emp.Juniors1.Add(new Employee() { ID = 14, Name = "Juniors14" });

emp.Juniors1.Add(new Employee() { ID = 15, Name = "Juniors15" });

emp.Juniors1.Add(emp1);

emps.Add(emp);

this.filterableTreeview.ItemsSource = emps;

}

code to dynamically added child items to treeview item

C# Code

private void filterableTreeview_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)

{

//TreeViewItem TVI = (TreeViewItem)filterableTreeview.ItemContainerGenerator.ContainerFromItem(e.NewValue);

//DirectoryInfo di = (DirectoryInfo)e.NewValue;

//TVI.ItemsSource=di.GetDirectories();

Employee emp = (Employee)e.NewValue;

emp.Juniors1 = new List<Employee>();

emp.Juniors1.Add(new Employee() { ID = 11, Name = "Juniors11" });

emp.Juniors1.Add(new Employee() { ID = 12, Name = "Juniors12" });

emp.Juniors1.Add(new Employee() { ID = 13, Name = "Juniors13" });

emp.Juniors1.Add(new Employee() { ID = 14, Name = "Juniors14" });

emp.Juniors1.Add(new Employee() { ID = 15, Name = "Juniors15" });

e.Handled = true;

}