I have a ListBox in app, it has an image and textbox inside. I want to set 2 colors and 3rd one for selected item.
<ListBox.ItemTemplate>
<DataTemplate x:Name="Template1">
<StackPanel Orientation="Horizontal" >
<Image Width="100" Height="100" Source="{Binding SmallImage}"></Image>
<Grid>
<TextBlock Text="{Binding Caption}" Foreground="{Binding txtColor}"></TextBlock>
</Grid>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
when I'm changing the foreground color, then the selected item doesn't highlights (I kept it by default). I tried to add an event to ListBox,
private void DList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
ListBoxItem selectedItem = DList.SelectedItem as ListBoxItem;
selectedItem.Foreground = new SolidColorBrush(Colors.Red);
}
but it shows an exception: NullReferenceException "Use the "new" keyword to create an object instance"
If you're going to handle the SelectionChanged
event, then you might as well use the SelectionChangedEventArgs
object:
private void DList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var selectedDataObject = e.AddedItems[0]; // assuming single selection
ListBoxItem selectedItem =
ListBoxName.ItemContainerGenerator.ContainerFromItem(selectedDataObject);
selectedItem.Foreground = new SolidColorBrush(Colors.Red);
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.