XAML代码如下:
<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>
相关的事件处理器代码如下所示:
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)); } }