小编suu*_*suu的帖子

我需要在列表框项目上添加功能,用户可以通过单独单击每个项目来选择项目,也可以执行shift +单击以选择列表中的一系列项目.

<ListBox ItemsSource="{Binding ItemFields, Mode=TwoWay}"
         VerticalAlignment="Stretch" HorizontalAlignment="Left"
         Margin="16,156,0,34" Name="fRListbox" Width="499" >                   
    <ListBox.ItemContainerStyle>                            
        <Style TargetType="{x:Type ListBoxItem}">
            <Setter Property="IsSelected" Value="{Binding Path=IsSelected, Mode=TwoWay}"/>
            <EventSetter Event="PreviewMouseLeftButtonDown" Handler="reportDatagrid_MouseDown"/>                              
        </Style>
    </ListBox.ItemContainerStyle>
</ListBox>

在xaml.cs上我写了下面的代码:

private void ListItem_MouseClick(object sender, MouseButtonEventArgs e)
{
    if ((e.LeftButton == MouseButtonState.Pressed) && Keyboard.IsKeyDown(Key.RightShift))
    {
        fRListbox.SelectionMode = SelectionMode.Extended;
    }
    else if ((e.LeftButton == MouseButtonState.Pressed) && Keyboard.IsKeyDown(Key.LeftShift))
    {
        fRListbox.SelectionMode = SelectionMode.Multiple;
    }
    else if (e.LeftButton == MouseButtonState.Pressed)
    {
        fRListbox.SelectionMode = SelectionMode.Multiple;
    }
}

但Shift + Click功能无效.我是WPF的新手任何人都可以指导我.