WPF 自定义控制的设置内容

Question

In my WPF app I have several labels on multiple pages that all look the same but may change style during program running (all at once).

After much searching online, I have gone through Window.Resources templates and User Controls (neither great for styling when changes are possible during program run) and have currently settled on CustomControl. However, I can't figure out how to set its Content. Some labels will have a wrap panel with mutiple grandchildren and some will just have text. However, I cannot work it out either way. This seems to be a program beyond Label. What am I missing?

My Control (just changed to inherit from Label):

 public class MyControl : Label
    {
        static MyControl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(MyControl), new FrameworkPropertyMetadata(typeof(MyControl)));
        }
    }

No changes to Themes.Generic.xaml

My Window XAML (styling here for testing purposes):

<local:MyControl Height="100">
            <TextBlock Text="hi there" FontSize="60"></TextBlock>
            <!-- More children will be needed, but lets start with one for now -->
</local:MyControl>

<local:MyControl Height="100" Content="this should exist" FontSize="50" />

How do I get that content to show up?

Edit: Removing the DefaultStyleKeyProperty.OverrideMetadata worked.

Answer 1

You should define a default template for your custom control if you're to override its DefaultStyleKeyProperty , in your Themes/Generic.xaml . Base it on the default template of Label :

<Style TargetType="{x:Type local:MyControl}" BasedOn="{StaticResource {x:Type Label}}"/>

Alternatively, you can remove the overriding of the DefaultStyleKeyProperty and leave your control like this:

public class MyControl : Label
{
    // No overriding
}