Question

my treeview is populated with textblock items.
If a user clicks on a textblock, i want to set a property in my model called “isSelected”.
But : the textblock have no Property IsSelected.
How can i Implement this ?
Derive from textblock and add a Property ?

Answer 1

You have to use the TreeViewItem.IsSelected property. You will have to specify the custom style for all items of the tree view.

<TreeView>
    <TreeView.Resources>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="IsSelected" Value="{Binding IsSelected}"/>
        </Style>
    </TreeView.Resources>
</TreeView>