如何获取所选列表框项目的值
本文关键字:列表 项目 何获取 获取 | 更新日期: 2023-09-27 18:22:03
我正在将数据从xml文件加载到列表框中。这是我的xaml
<ListBox x:Name="lstSearchCategory" FontFamily="Arial Black"
VerticalAlignment="Center" Margin="25,69,19,10" Height="264">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel >
<Image Source="{Binding Image}" Height="100" Width="100"
HorizontalAlignment="Left"></Image>
<TextBlock HorizontalAlignment="Right" Text="{Binding Name}"
FontSize="30" Foreground="Black" Margin="140,-100,0,0"/>
<TextBlock Text="{Binding Category}" FontSize="24"
Foreground="Black" Margin="10,-10,0,0"/>
<TextBlock Text="{Binding Price}" HorizontalAlignment="Right"
Foreground="Red" Margin="300,-25,0,16"/>
<Rectangle Width="500" Fill="Black" Height="0.5"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
这很好用。现在我想,当我选择任何列表框项目时,我都会得到它各自的值,即图像、价格、类别等。我该怎么做?帮助
您需要在ListBox事件中获取所选项目,并从ListBox中获取DataTemplate(如MSDN上所示):
private void lstEvents_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
ListBoxItem lbi = (lstEvents.ItemContainerGenerator.ContainerFromIndex(lstEvents.SelectedIndex)) as ListBoxItem;
ContentPresenter cp = GetFrameworkElementByName<ContentPresenter>(lbi);
DataTemplate dt = lstEvents.ItemTemplate;
Label l = (dt.FindName("lblEventId", cp)) as Label;
MessageBox.Show(l.Content.ToString());
}
您需要在XAML文件中生成Tap = "lstSearchCategory_Tap"
,并在.cs
文件中生成以下代码
private void lstSearchCategory_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
try
{
ListBox ListBoxSelecteditem = (ListBox)sender;
YourModel model = (YourModel)ListBoxSelecteditem.SelectedItem;
string name = model.Name;
string cat = model.Category;
.......
string ControlName = ((System.Windows.FrameworkElement)
(((System.Windows.RoutedEventArgs)(e)).OriginalSource)).Name;
if (ControlName.ToLower() != "name".ToLower())
{
}
}
catch (Exception ex)
{ }
}
尝试这个
<ListBox Tap="lstSearchCategory_Tap" x:Name="lstSearchCategory">
然后添加这个
var selected = (classname)lstSearchCategory.SelectedValue;
MessegeBox.Show(selected.Name + selected.Price);
这里的类名是绑定名称、价格等值的类名
如果通过绑定填充ListBox
,则视图模型中应该有一些属性lile SelectedItem
。因此,当前选择的项目应始终存储在视图模型中,以便于访问。只要在视图模型中为SelectedItem
添加一个绑定,一切都会正常工作。