如何从用户控件为页面/窗口创建输入笔势

你可以处理 Loaded 事件 UserControl 在逻辑树中查找所属的页面/窗口,然后可以在其中添加绑定。

例如

public partial class Bogus : UserControl
{
    public Bogus()
    {
        Loaded += (s, e) => { HookIntoWindow(); };
        InitializeComponent();
    }

    private void HookIntoWindow()
    {
        var current = this.Parent;
        while (!(current is Window) && current is FrameworkElement)
        {
            current = ((FrameworkElement)current).Parent;
        }
        if (current != null)
        {
            var window = current as Window;
            // Add input bindings
            var command = new AlertCommand();
            window.InputBindings.Add(new InputBinding(command, new KeyGesture(Key.D1, ModifierKeys.Control)));
        }
    }
}