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RoutedUICommand是WPF中的一个命令类,用于定义和处理用户界面上的命令操作。它可以在XAML中定义和使用,并且可以与菜单、工具栏、按钮等UI元素关联,以实现统一的命令处理逻辑。
以下是一个使用RoutedUICommand的样例代码:
csharp
public static class CustomCommands
{
public static readonly RoutedUICommand Open = new RoutedUICommand(
"Open",
"Open",
typeof(CustomCommands),
new InputGestureCollection()
{
new KeyGesture(Key.O, ModifierKeys.Control)
}
);
public static readonly RoutedUICommand Save = new RoutedUICommand(
"Save",
"Save",
typeof(CustomCommands),
new InputGestureCollection()
{
new KeyGesture(Key.S, ModifierKeys.Control)
}
);
}
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
CommandBinding openCommandBinding = new CommandBinding(
CustomCommands.Open,
OpenCommandExecuted,
OpenCommandCanExecute
);
CommandBinding saveCommandBinding = new CommandBinding(
CustomCommands.Save,
SaveCommandExecuted,
SaveCommandCanExecute
);
this.CommandBindings.Add(openCommandBinding);
this.CommandBindings.Add(saveCommandBinding);
this.InputBindings.Add(new KeyBinding(
CustomCommands.Open,
new KeyGesture(Key.O, ModifierKeys.Control)
));
this.InputBindings.Add(new KeyBinding(
CustomCommands.Save,
new KeyGesture(Key.S, ModifierKeys.Control)
));
}
private void OpenCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
// 打开文件的逻辑
}
private void OpenCommandCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
// 判断是否可以执行打开文件的命令
e.CanExecute = true;
}
private void SaveCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
// 保存文件的逻辑
}
private void SaveCommandCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
// 判断是否可以执行保存文件的命令
e.CanExecute = true;
}
}
在上述代码中,我们定义了两个RoutedUICommand:Open和Save。然后,在MainWindow的构造函数中,我们创建了两个CommandBinding,将这两个命令与对应的命令处理方法关联起来。同时,我们还创建了两个KeyBinding,将这两个命令与快捷键关联起来。这样,当用户点击菜单、工具栏按钮或按下快捷键时,就会触发对应的命令处理方法。" |
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