DependencyProperty binding not happening on initial load
- by Ari Roth
I'm trying to do something simple -- make a DependencyProperty and then bind to it. However, the getter doesn't appear to fire when I start up the app. (I'm guessing the solution will make me smack my head and go "Doh!", but still. :) )
Any ideas?
Code-behind code:
public static readonly DependencyProperty PriorityProperty =
DependencyProperty.Register("Priority",
typeof (Priority), typeof (PriorityControl), null);
public Priority Priority
{
get { return (Priority)GetValue(PriorityProperty); }
set { SetValue(PriorityProperty, value); }
}
Control XAML:
<ListBox Background="Transparent"
BorderThickness="0"
ItemsSource="{Binding Path=Priorities}"
Name="PriorityList"
SelectedItem="{Binding Path=Priority, Mode=TwoWay}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Height="16" Width="16">
<Border BorderBrush="Black"
BorderThickness="2"
CornerRadius="3"
Visibility="{Binding RelativeSource=
{RelativeSource Mode=FindAncestor, AncestorType=ListBoxItem}, Path=IsSelected, Converter={StaticResource boolToVisibilityConverter}}" />
<Border CornerRadius="3" Height="12" Width="12">
<Border.Background>
<SolidColorBrush Color="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListBoxItem}, Path=Content, Converter={StaticResource priorityToColorConverter}}" />
</Border.Background>
</Border>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
Binding statement:
<UI:PriorityControl Grid.Column="8"
Priority="{Binding Path=Priority}"
VerticalAlignment="Center"/>
Some other notes:
Binding is in a UserControl
UserControl contains the PriorityControl
PriorityControl contains the DependencyProperty
I've checked that the data the UserControl is getting the appropriate data -- every other binding works.
If I change the selection on the PriorityControl via the mouse, everything fires as appropriate. It's just that initial setting of the value that isn't working.
Priority is an enum.
