在DataTemplate中绑定控件的属性

Question

I have a custom control where I have modified a ListView. I have a DataTemplate which shows each item as an icon of width 128 and a label beneath it.

<DataTemplate x:Key="AeroIconTemplate">
    <Grid VerticalAlignment="Top" Margin="0">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Image Grid.Row="0" Source="{Binding Image}" Width="128"
               MaxHeight="128" Margin="0"/>
        <TextBlock Grid.Row="1" Text="{Binding Title}" Foreground="Black"
                   TextWrapping="WrapWithOverflow" Margin="0" 
                   TextTrimming="CharacterEllipsis" Width="128" MaxHeight="60" />
    </Grid>
</DataTemplate>

Now I have added a property to the ListView itself called IconSize. This takes an integer between 16 and 256.

I want to bind the Width , MaxHeight of the Image and the Width of the TextBlock to this property. So whenever the IconSize property is changed the template is adjusted in size. As you can see I am currently binding some stuff to the data object (the image source and the label text), but in this case I want to bind to the ListView control .

How do I do this?

Thanks!

Answer 1

You can use the RelativeSource for that:

... Width="{Binding IconSize,RelativeSource={RelativeSource AncestorType=ListView}}" ...

Be sure to define the correct type, since the WPF ListView does not have the property IconSize . You may need to define your class.