1、创建一个类

public class CustomCommandTest
{private static RoutedUICommand customCommand;public static RoutedUICommand CustomCommand{get { return customCommand; }}static CustomCommandTest(){InputGestureCollection inputGestureCollection = new InputGestureCollection();inputGestureCollection.Add(new KeyGesture(Key.R, ModifierKeys.Control, "Ctrl+R"));customCommand = new RoutedUICommand("", "CustomCommand", typeof(CustomCommandTest), inputGestureCollection);}
}

2、在xaml中使用该类

<Window.CommandBindings><CommandBinding Command="{x:Static local:CustomCommandTest.CustomCommand}" Executed="CustomCommand_Execute"/>
</Window.CommandBindings>

        -- 其中的Executed就是摁下快捷键要调用code_behind的方法