创建关键在WPF结合 [英] Create Key binding in WPF

问题描述

我需要创建输入窗口结合

I need to create input binding for Window.

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>

如果我初始化SomeCommand一些CustomCommand：ICommand的它不火。 SomeCommand属性的get（）不会被调用。

If i init SomeCommand with some CustomCommand:ICommand it doesn't fire. SomeCommand property get() is never called.

推荐答案

有关你的情况最好的方式使用MVVM模式

For your case best way used MVVM pattern

XAML：

 <Window>
    <Window.InputBindings>
        <KeyBinding Command="{Binding SomeCommand}" Key="F5"/>
    </Window.InputBindings>
 </Window>
 .....

后面的代码：

Code behind:

   public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
     }

在您的视图模型：

public class MyViewModel
{
    private ICommand someCommand;
    public ICommand SomeCommand
    {
        get
        {
            return someCommand 
                ?? (someCommand = new ActionCommand(() =>
                {
                    MessageBox.Show("SomeCommand");
                }));
        }
    }
}

然后，你需要一个执行的ICommand的。
这个简单有用的类

Then you'll need an implementation of ICommand. This simple helpful class.

 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;
    }   

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