using System.Windows;namespace TestOfCommandParameter{    /// 
    /// Interaction logic for MainWindow.xaml    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        private void New_CanExecute(object sender, System.Windows.Input.CanExecuteRoutedEventArgs e)        {            if (string.IsNullOrEmpty(this.newTextBox.Text))            {                e.CanExecute = false;            } else            {                e.CanExecute = true;            }        }        private void New_Executed(object sender, System.Windows.Input.ExecutedRoutedEventArgs e)        {            string name = this.newTextBox.Text;            if (e.Parameter.ToString()=="Teacher")            {                this.listBoxNewItems.Items.Add(string.Format("New Teacher:{0},学而不厌，诲人不倦。", name));            }            if (e.Parameter.ToString() == "Student")            {                this.listBoxNewItems.Items.Add(string.Format("New Student:{0},好好学习，天天向上。", name));            }        }    }}