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WPF: setting datatemplate using binding property

I am very new to WPF. I have a ListBox where I want to set a template for an item (I named it Person). A TextBlock must be used. The person must have public properties: "Foreground" and "IsOnline". If "IsOnline" is true, I would use the "Foreground" property of the person, otherwise "Gray". All this. My first template:

<DataTemplate x:Key="UnselectedPersonTemplate" DataType="{x:Type o:Person}">
    <TextBlock Text="{Binding Path=Name}" Foreground="{Binding Path=Foreground}" Margin="1">
        <DataTemplate.Triggers>
            <DataTrigger Binding="{Binding Path=IsOnline}" Value="False">
                <Setter Property="TextBlock.Foreground" Value="Gray" />
            </DataTrigger>
        </DataTemplate.Triggers>
</DataTemplate>

Of course it doesn't work. Not an exception, but also not an expected result. Then I tried using Trigger for the TextBlock, but there will be an exception that I cannot use DataTriggers (EventTriggers only) to do this.

Thanks for any advice! :)

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1 answer


Give your TextBlock

name and set the set property to t12 for that name.



<DataTemplate x:Key="UnselectedPersonTemplate" DataType="{x:Type o:Person}">
    <TextBlock x:Name="tb" Text="{Binding Path=Name}" 
          Foreground="{Binding Path=Foreground}" Margin="1" />
    <DataTemplate.Triggers>
       <DataTrigger Binding="{Binding Path=IsOnline}" Value="False">
          <Setter TargetName="tb" Property="Foreground" Value="Gray" />
       </DataTrigger>
    </DataTemplate.Triggers>
</DataTemplate>
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