Question

According to thread (WPF, C#) hierarchicalDataTemplate

I didn’t get it to work.
My problem is just that a treeviewitem of class department can be added to another department treeeviewitem and so on… For now it’s just possible to implement a 1-level department structure.

- Department 2
         - Department 4
                 - Department 5
                        -Client 4
                               - Feature 1

I’m very grateful for some new help.
Thanks.

Answer 1

Is this what you mean?
Give all the items ( Department, Client and maybe Feature) an ObservableCollection<object> property and name it Children
Also add a String Name property in every item.

You can add anything to Children like Department or Client or whatever.
This is the xaml:

<TreeView x:Name="treeView1" ItemsSource="{Binding}">
  <TreeView.ItemTemplate>
    <HierarchicalDataTemplate ItemsSource="{Binding Path=Children}">
      <TextBlock Text="{Binding Path=Name}"/>
    </HierarchicalDataTemplate>
  </TreeView.ItemTemplate>
</TreeView>

Example classes:

public class Department
{
  public ObservableCollection<Object> Children { get; set; }
  public string Name { get; set; }
}

public class Client
{
  public ObservableCollection<Object> Children { get; set; }
  public string Name { get; set; }
}