How to make a ListBox.ItemTemplate reusable/generic
If you wanted one way display then you could use a converter:
class ListConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return ((IList<MyDataItem>)value).Select(i => new { Checked = i.Checked2, DisplayName = i.DisplayName2 });
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
Then the xaml would look something like this:
<Window.Resources>
<this:ListConverter x:Key="ListConverter" />
</Window.Resources>
<ListBox ItemsSource="{Binding Path=Items, Converter={StaticResource ListConverter}}">
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding Path=Checked, Mode=OneWay}" Content="{Binding Path=DisplayName, Mode=OneWay}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
That data template you could make generic like above. Two way binding would be a fair bit more difficult.
I think you are better off making your base classes implement a ICheckedItem interface which exposes the generic properties that you want the datatemplates to bind to?
Create your DataTemplate as a resource and then reference it using the ItemTemplate property of the ListBox. MSDN has a good example
<Windows.Resources>
<DataTemplate x:Key="yourTemplate">
<CheckBox IsChecked="{Binding Path=Checked}" Content="{Binding Path=DisplayName}" />
</DataTemplate>
...
</Windows.Resources>
...
<ListBox Name="listBox1"
ItemTemplate="{StaticResource yourTemplate}"/>
The easiest way is probably to put the DataTemplate
as a resource somewhere in your application with a TargetType
of MyDataItem
like this
<DataTemplate DataType="{x:Type MyDataItem}">
<CheckBox IsChecked="{Binding Path=Checked}" Content="{Binding Path=DisplayName}" />
</DataTemplate>
You'll probably also have to include an xmlns
to your local assembly and reference it through that. Then whenever you use a ListBox
(or anything else that uses a MyDataItem
in a ContentPresenter
or ItemsPresenter
) it will use this DataTemplate
to display it.