Refer to value from ItemControl

Question

I have a itemscontrol as below

   <StackPanel>
        <ItemsControl Name="PlannerItemControl" Grid.Row="0" Grid.Column="0">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <Grid Name="MainGrid" Style="{StaticResource VisibleKey}">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="*" />
                            <RowDefinition Height="35" />
                        </Grid.RowDefinitions>
                        <Label Grid.Row="1" Grid.Column="2" Name="lblTimeText" Content="{Binding ID}" HorizontalAlignment="Center"/>
                    </Grid>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>
    </StackPanel>
    <Label Grid.Row="1" Grid.Column="2" Name="lblTime2" Content="{Binding ID}" HorizontalAlignment="Center"/>

Is it possible to retrieve the value of ID from the itemscontrol outside of the itemscontrol? Basically I want the value of Label lblTimeText in label lblTime2. Please help.

Have you set ID to use NotifyPropertyChanged in your ViewModel? then your binding should work — VisualBean, Apr 22 '15 at 08:41
@VisualBean Yes I have. It works as expected in lblTimeText but please note that itemsouce of PlannerItemControl is a ObservableCollection set in the code. — user2837961, Apr 22 '15 at 08:48
Ahh so your looking for a selectedItem.ID or are there multiple lbltime2? — VisualBean, Apr 22 '15 at 08:56
@VisualBean Yes I am looking for selectedItem.ID outside the itemscontrol. There is only one lblTime2- don't understand 'are there mutiple lblTime2' — user2837961, Apr 22 '15 at 08:59
ItemsControl doesn't track selectedItem - thus I thought you might have multiple labels to fill (wierd, but what the heck :)) - see this answer http://stackoverflow.com/questions/18456836/gettting-selected-item-in-itemscontrol — VisualBean, Apr 22 '15 at 09:00
@VisualBean Thanks for that. Assuming that I changing the ItemsControl to ListBox, how would lblTime2 refer to selecteditem? — user2837961, Apr 22 '15 at 09:18

VisualBean · Answer 1 · 2015-04-22T10:28:14.750

The ItemsControl does not track SelectedItem - instead use a ListBox. (The selectedItem should be the same type as your collection items).

To track a selectedItem you need to bind the selectedItem property of the listbox to a property in your ViewModel

<Listbox ItemsSource="{Binding Path=YourCollection}" SelectedItem="{Binding YourItem}">

(remember INotifyChanged)

and then bind that item.id to your label

 <Label Grid.Row="1" Grid.Column="2" Name="lblTime2" Content="{Binding YourItem.ID}" HorizontalAlignment="Center"/>

Refer to value from ItemControl

1 Answers1