Caliburn Micro动作

Question

我对一件事感到困惑。当我(string firstName)从称为ClearText和的方法（或其中一种方法）中删除参数CanClearText时，清除数据后该按钮不会变为禁用状态。你能解释发生了什么吗？这是财产；public string FirstName{    get    {        return _firstName;    }    set    {        _firstName = value;        NotifyOfPropertyChange(() => FirstName);    }}这些是方法：public bool CanClearText(string firstName){    return !string.IsNullOrWhiteSpace(FirstName);}public void ClearText(string firstName){    FirstName = "";}这是相应的文本框和按钮<TextBox x:Name ="FirstName" MinWidth="100" Grid.Column="1" Grid.Row="2"></TextBox><Button Grid.Row="4" Grid.Column="1" x:Name="ClearText"> Clear Names </Button>