Question

可能看起来很傻。当命令绑定时，无法确定此处的按钮示例代码，

我有自定义控件，

public class Stepper: ListBox
{
        /// <summary>
        /// Internal command used by the XAML template (public to be available in the XAML template). Not intended for external usage.
        /// </summary>
        public static readonly RoutedCommand BackCommand = new RoutedCommand();

        static Stepper()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(UXStepper), new FrameworkPropertyMetadata(typeof(Stepper)));
        }

        public UXStepper()
        {
            CommandBindings.Add(new CommandBinding(BackCommand, (o, e) => ZoomFit(), (o, e) => e.CanExecute = true));
        }

        private void ZoomFit()
        {
            //some implementation
        }
}

XAML代码

 <Button HorizontalAlignment="Center" 
         VerticalAlignment="Center"
         Content="Back"
         Command="{x:Static shui:Stepper.BackCommand}"/>

Answer 1

如果我理解正确：您的问题是绑定无效

如果您要绑定某些具有静态属性的东西，而不必定义源

<Window.Resources>
    <shui:Stepper x:Key="stepper"/>
</Window.Resources>

<Button HorizontalAlignment="Center" 
        VerticalAlignment="Center"
        Content="Back"
        Command="{BackCommand, Source={StaticResource stepper}}"/>

或者您可以将其绑定到您的Singleton（如果有的话）


<Button HorizontalAlignment="Center" 
        VerticalAlignment="Center"
        Content="Back"
        Command="{BackCommand, Source={x:Static shui:Stepper.Instance}}"/>

添加命令后禁用按钮

1 个答案: