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问题

鉴于这段代码,我想在按下它时访问ListBoxItem包含 a的属性(更具体地说,它的索引)。Button我认为我需要获取Button' 的父级(它是一个StackPanel),然后是它的父级TemplatedParent,然后沿着 Visual Tree 向上走,但我不知道两件非常重要的事情:如何有效地解决我的问题,这是否真的解决了我的问题。

XAML

<ListBox x:Name="myListBox"  Foreground="Black" HorizontalAlignment="Left" Height="101"     Margin="237,312,0,0" VerticalAlignment="Top" Width="420">
    <ListBox.ItemTemplate>
        <!--src is the alias I gave to the xmlns that gives me access to the    assembly on which I'm working-->
        <DataTemplate DataType="{x:Type src:Items}">
             <DataTemplate.Resources>
                  <Style TargetType="Label">
                      <Setter Property="Foreground" Value="Black"/>
                      <Setter Property="FontFamily" Value="Tahoma"/>
                  </Style>
              </DataTemplate.Resources>
              <StackPanel Orientation="Horizontal">
              <!--Property1 to Property3 are defined in the Items type-->
                  <Label Content="{Binding Path=Property1}" Width="30"  MaxWidth="30"/>
                  <Label Content="{Binding Path=Property2}" Width="100" MaxWidth="100"/>
                  <Label Content="{Binding Path=Property3}" Width="250" MaxWidth="250"/>
                  <Button Content="X" Width="30" MaxWidth="30" Click="RemoveItemFromList"/>
              </StackPanel>
        </DataTemplate>
     </ListBox.ItemTemplate>
</ListBox>

C夏普

我的一段代码可以正常工作

//Somewhere in my code
ObservableCollection<Items> myStuff = createListOfItems();
myListBox.DataContext = myStuff;
myListBox.setBinding(ItemsControl.ItemsSourceProperty, new Binding());

我认为可能是答案(不工作)

private void RemoveItemFromList(object sender, RoutedEventArgs e)
{
    int index = (((sender as Button).Parent as StackPanel).TemplatedParent as ListBoxItem).IsSelected = true;
    myStuff.RemoveAt(myListBox.SelectedIndex); 
}
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1 回答 1

1

ItemsControl有一个可以使用的实用方法,称为ContainerFromElement. 您从项目容器的可视子树中传入一个元素,它会为您提供容器,例如ListBoxItem

var container = ItemsControl.ContainerFromElement(myListBox, sender as UIElement)
                as ListBoxItem;
于 2014-11-10T15:59:41.347 回答