C# 在 WPF 中创建键绑定
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Create Key binding in WPF
提问by deeptowncitizen
I need to create input binding for Window.
我需要为 Window 创建输入绑定。
public class MainWindow : Window
{
public MainWindow()
{
SomeCommand = ??? () => OnAction();
}
public ICommand SomeCommand { get; private set; }
public void OnAction()
{
SomeControl.DoSomething();
}
}
<Window>
<Window.InputBindings>
<KeyBinding Command="{Binding SomeCommand}" Key="F5"></KeyBinding>
</Window.InputBindings>
</Window>
If I init SomeCommandwith some CustomCommand : ICommandit doesn't fire. SomeCommandproperty getter is never called.
如果我SomeCommand用一些初始化CustomCommand : ICommand它不会触发。SomeCommand永远不会调用属性 getter。
采纳答案by Aleksey
For your case best way used MVVM pattern
对于您的情况，使用 MVVM 模式的最佳方式
XAML:
XAML：
<Window>
<Window.InputBindings>
<KeyBinding Command="{Binding SomeCommand}" Key="F5"/>
</Window.InputBindings>
</Window>
Code behind:
后面的代码：
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
}
In your view-model:
在您的视图模型中：
public class MyViewModel
{
private ICommand someCommand;
public ICommand SomeCommand
{
get
{
return someCommand
?? (someCommand = new ActionCommand(() =>
{
MessageBox.Show("SomeCommand");
}));
}
}
}
Then you'll need an implementation of ICommand.
This simple helpful class.
然后你需要一个ICommand. 这个简单有用的课程。
public class ActionCommand : ICommand
{
private readonly Action _action;
public ActionCommand(Action action)
{
_action = action;
}
public void Execute(object parameter)
{
_action();
}
public bool CanExecute(object parameter)
{
return true;
}
public event EventHandler CanExecuteChanged;
}
回答by Nitin
You will have to create your own Commandimplementing ICommandinterface and initialize SomeCommandwith the instance of that Command.
您必须创建自己的Command实现ICommand接口并SomeCommand使用该实例进行初始化Command。
Now you have to set the DataContextof Window to self in order to make the CommandBindingwork:
现在您必须将DataContextWindow设置为 self 才能完成CommandBinding工作：
public MainWindow()
{
InitializeComponents();
DataContext = this;
SomeCommand = MyCommand() => OnAction();
}
OR you will have to update your Bindingas
或者你将不得不更新你Binding的
<Window>
<Window.InputBindings>
<KeyBinding Command="{Binding SomeCommand, RelativeSource={RelativeSource Self}}" Key="F5"></KeyBinding>
</Window.InputBindings>
</Window>
回答by Paul-Sebastian Manole
For modifiers (key combinations):
对于修饰符（组合键）：
<KeyBinding Command="{Binding SaveCommand}" Modifiers="Control" Key="S"/>
回答by Jitendra Pancholi
It might be too late but here is the simplest and shortest solution.
可能为时已晚，但这是最简单和最短的解决方案。
private void Window_KeyDown(object sender, KeyEventArgs e)
{
if (Keyboard.Modifiers == ModifierKeys.Control && e.Key == Key.S)
{
// Call your method here
}
}
<Window x:Class="Test.MainWindow" KeyDown="Window_KeyDown" >
