重新绘制ContentControl的数据模板

您可以删除ContentTemplate并为返回MyCustomControl实例的内容绑定编写转换器:

<ContentControl Content="{Binding SelectedEntry,
                          RelativeSource={RelativeSource TemplatedParent},
                          Converter={StaticResource MyCustomControlConverter}}"/>

public class MyCustomControlConverter : IValueConverter
{
    public object Convert(
        object value, Type targetType, object parameter, CultureInfo culture)
    {
        var control = new MyCustomControl();

        control.SetBinding(MyCustomControl.TextProperty,
            new Binding("Text") { Source = value });
        control.SetBinding(MyCustomControl.ParameterProperty,
            new Binding("Parameters") { Source = value });

        return control;
    }

    public object ConvertBack(
        object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}