You need to set DataType
on DataTemplate
to get it applied automatically to underlying data objects in case you are defining DataTemplate
under Resources section.
<DataTemplate DataType="local:ClosableTab">
<ContentControl>
<ContentControl.Triggers>
<DataTrigger Binding="{Binding isProperty}" Value="True">
<Setter Property="ContentTemplate"
Value="{StaticResource PropertyTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding isProperty}" Value="False">
<Setter Property="ContentTemplate"
Value="{StaticResource TennantTemplate}" />
</DataTrigger>
</ContentControl.Triggers>
</ContentControl>
</DataTemplate>
Make sure to declare local
namespace at root level to the one where ClosableTab
is declared.
OR
Instead of adding DataTemplate in resources, set it explicitly as ItemTemplate
of TabControl.
<TabControl>
<TabControl.ItemTemplate>
<DataTemplate x:Key="DefaultTab">
.....
</DataTemplate>
</TabControl.ItemTemplate>
</TabControl>
UPDATE
Ideal case would be to have single DataTemplate
and apply dataTrigger on TextBlock instead.
<TabControl ItemsSource="{Binding OpenTabs}">
<TabControl.ItemTemplate>
<DataTemplate>
<TextBlock>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Text" Value="{Binding address}"/>
<Style.Triggers>
<DataTrigger Binding="{Binding isProperty}"
Value="False">
<Setter Property="Text" Value="{Binding name}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</DataTemplate>
</TabControl.ItemTemplate>
</TabControl>