自定义命令

MyCommand.cs

public class MyCommand : ICommand
{private readonly Action<Object> execAction;private readonly Func<Object,bool> changedFunc;public event EventHandler? CanExecuteChanged;public MyCommand(Action<object> execAction,Func<object,bool>changeFunc){this.execAction = execAction;this.changedFunc=changeFunc;}public bool CanExecute(object? parameter){return this.changedFunc.Invoke(parameter);}public void Execute(object? parameter){//  逻辑this.execAction.Invoke(parameter);}
}

ViewMode.cs

 public class ViewMode{bool isCanExec = true;//  这是属性的写法  ，命令必须是属性public ICommand MyCommand=>new MyCommand(MyAction,MyCanExec);private void MyAction(object prampartter){//  写逻辑MessageBox.Show("我被触发啦");isCanExec = false;}private bool MyCanExec(object pramparter){return isCanExec;}}