<Window x:Class="Demo006.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="240" Width="360" WindowStyle="ToolWindow">    <Grid>        <Grid.RowDefinitions>            <RowDefinition Height="24" />            <RowDefinition Height="4" />            <RowDefinition Height="24" />            <RowDefinition Height="4" />            <RowDefinition Height="24" />            <RowDefinition Height="4" />            <RowDefinition Height="*" />        </Grid.RowDefinitions>        <TextBlock  Grid.Row="0" Text="Name:" VerticalAlignment="Center" HorizontalAlignment="Left" />        <TextBox Grid.Row="0" Name="NameTextBox" Margin="60,0,0,0" />        <Button Grid.Row="2" Content="New Teacher" Command="New" CommandParameter="Teacher" />        <Button Grid.Row="4" Content="New Student" Command="New" CommandParameter="Student" />        <ListBox Grid.Row="6" Name="NewItemListBox" Height="117" VerticalAlignment="Bottom" />    </Grid>    <Window.CommandBindings>        <CommandBinding Command="New"                        CanExecute="CommandBinding_CanExecute"                         Executed="CommandBinding_Executed" />    </Window.CommandBindings></Window>

private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e){    if (string.IsNullOrEmpty(this.NameTextBox.Text) == true) e.CanExecute = false;    else e.CanExecute = true;}private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e){    string name = this.NameTextBox.Text;    if (e.Parameter.ToString() == "Teacher")    {        this.NewItemListBox.Items.Add(string.Format("New Teacher: {0}， 学而不厌，诲人不倦。", name));    }    else if (e.Parameter.ToString() == "Student")    {        this.NewItemListBox.Items.Add(string.Format("New Student: {0}，好好学习，天天向上。", name));    }}