public MainWindow()
{
InitializeComponent();
this.AddHandler(ListBox.SelectionChangedEvent,
new SelectionChangedEventHandler(GenericHandler));
this.AddHandler(Button.ClickEvent,
new RoutedEventHandler(GenericHandler));
}
void GenericHandler(object sender, RoutedEventArgs e)
{
if(e.RoutedEvent==Button.ClickEvent)
{
MessageBox.Show("You just clicked " + e.Source);
}
else if(e.RoutedEvent==ListBox.SelectionChangedEvent)
{
SelectionChangedEventArgs sce=e as SelectionChangedEventArgs;
if(sce.AddedItems.Count>0)
{
MessageBox.Show("You just selected "+sce.AddedItems[0]);
}
}
}
<Window x:Class="WpfApp343.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp343"
SizeToContent="WidthAndHeight"
Background="OrangeRed"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<StackPanel>
<Label FontWeight="Bold" FontSize="20" Foreground="White">
WPF 4 Unleashed
</Label>
<Label>@ 2010 SMAS Publishing</Label>
<Label>Installed Chapters:</Label>
<ListBox>
<ListBoxItem>Chapter 1</ListBoxItem>
<ListBoxItem>Chapter 2</ListBoxItem>
</ListBox>
<StackPanel Orientation="Horizontal"
HorizontalAlignment="Center">
<Button MinWidth="75" Margin="10">Help</Button>
<Button MinWidth="75" Margin="10">OK</Button>
</StackPanel>
<StatusBar>You have successfully registered this product.</StatusBar>
</StackPanel>
</Window>
标签：eventhandler,AddedItems,just,SelectionChangedEvent,Generic,sce,GenericHandler,WP From： https://www.cnblogs.com/Fred1987/p/18400493