I want to change my content off an AppBar dynamicly whith this code:
<Page.Resources>
<local:AppBarSelector x:Key="myAppBarSelector"/>
</Page.Resources>
<Page.BottomAppBar>
<AppBar>
<ContentControl Content="{Binding SelectedItem, ElementName=listBox}" ContentTemplateSelector="{StaticResource myAppBarSelector}">
<ContentControl.Resources>
<DataTemplate x:Key="1">
<TextBlock Text="Hallo Welt 1" Foreground="White" />
</DataTemplate>
<DataTemplate x:Key="2">
<TextBlock Text="Hallo Welt 2" Foreground="White" />
</DataTemplate>
</ContentControl.Resources>
</ContentControl>
</AppBar>
</Page.BottomAppBar>
And this is my Code behind:
public class AppBarSelector : DataTemplateSelector
{
protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
{
Debug.WriteLine((string)item);
if (item == null) return base.SelectTemplateCore(item, container);
var contentControl = (ContentControl)container;
var templateKey = (string)item;
return (DataTemplate)contentControl.Resources[templateKey];
}
}
But this method is nerver called.Even the Debug.WriteLine
function. Where is my mistake?