TreeListView Filters problem

[Pepe]

Hello  the filters doesn’t appears when I bind a TreeListView to a specific model, the approach of the model is similar as this:

public class A
    {
        private static readonly ObservableCollection<A> _children = new ObservableCollection<A>();

        public static ObservableCollection<A> Children
        {
            get { return _children; }
        }
    }

public class B : A
    {
        public string Name { get; set; }

        public string Type { get; set; }

        public virtual void LoadChildren()
        {
            // add some A items
            for (int i = 0; i < 10; i++)
            {
                Children.Add(new B{Name = i.ToString(),Type = "string"});
            }
        }
    }

 public class C : B
    {
        public override void LoadChildren()
        {
            // add some C items
            for (int i = 0; i < 10; i++)
            {
                Children.Add(new C { Name = i.ToString(), Type = "string" });
            }
        }
    }

MainWindow.xaml:

<telerik:RadTreeListView x:Name="tv">
                                <telerik:RadTreeListView.ChildTableDefinitions>
                                    <telerik:TreeListViewTableDefinition ItemsSource="{Binding Children}" />
                                </telerik:RadTreeListView.ChildTableDefinitions>

                                <telerik:RadTreeListView.Columns>
                                    <telerik:GridViewDataColumn Width="*" 
                                                            DataMemberBinding="{Binding Name}"
                                                            Header="Name"/>

                                    <telerik:GridViewDataColumn Width="Auto" 
                                                            MinWidth="150"
                                                            DataMemberBinding="{Binding Type}"
                                                            Header="Type"
                                                            HeaderTextAlignment="Center" />

                                </telerik:RadTreeListView.Columns>
                            </telerik:RadTreeListView>

Mainwindow.cs

  private void Window_Loaded(object sender, RoutedEventArgs e)

 {

            var b = new B();

            b.LoadChildren();

            var c = new C();

            c.LoadChildren();

          

            tv.ItemsSource = A.Children;

}

Thanks in advance.

[Ivan Ivanov]

Hello Pepe,

This inheritance architectures implies that you are using heterogeneous data as ItemsSource of your RadTreeListView. Since RadTreeListView is meant to work properly with homogeneous data only, I wouldn't advise you to use it for this very case. You may try to implement this scenario, utilizing a hierarchical RadGridView.


Greetings,
Ivan Ivanov
the Telerik team

[Julian]

Ok, I have the same issue.

My class structure is the following one:

public interface IYamlItem
{
}

public abstract class YamlItemBase: IYamlItem
{
}

public class YamlItem: YamlItemBase
{
}

and I also have collection of YamlItem:

public class YamlItems : ObservableCollection<YamlItem>
{
 public YamlItems (){}

 public YamlItems (List<YamlItem> newSource) : base (newSource)
 {
 }
}

what I'm doing wrong ?

Thank you in advance,
Julian

[Julian]

Forget about my question, I solve them :)