Trouble using external resources in inherited control

Question

I have a control that inherits ItemsControl. The control uses several external resources, here is my XAML:

<ItemsControl
	x:Class="ScorePadWithItemsControl_Common.PlayerNames"
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
	xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
	xmlns:app="using:UniversalAppExtras" mc:Ignorable="d">
	<ItemsControl.Resources>
		<ResourceDictionary>
			<ResourceDictionary.MergedDictionaries>
				<ResourceDictionary Source="ms-appx:///UniversalAppExtras/BasicButton.xaml"/>
				<ResourceDictionary Source="ms-appx:///UniversalAppExtras/NoDeleteTextBox.xaml"/>
				<ResourceDictionary>
					<app:IsNullOrWhiteSpaceConverter x:Key="IsNullOrWhiteSpace"/>
					<app:HideValueOpacityConverter x:Key="HideValueOpacity"/>
				</ResourceDictionary>
			</ResourceDictionary.MergedDictionaries>
		</ResourceDictionary>
	</ItemsControl.Resources>
	<ItemsControl.ItemsPanel><ItemsPanelTemplate><StackPanel/></ItemsPanelTemplate></ItemsControl.ItemsPanel>
	<ItemsControl.ItemTemplate>
		<DataTemplate>
			<Grid x:Name="grdPlayerTemplate" Margin="0,3">
				<Grid.ColumnDefinitions>
					<ColumnDefinition Width="*"/>
					<ColumnDefinition Width="Auto"/>
					<ColumnDefinition Width="Auto"/>
				</Grid.ColumnDefinitions>
				<TextBox Grid.Column="0" Style="{StaticResource NoDeleteTextBox}" FontSize="32" Margin="0,3" Padding="3,-6" Text="{Binding PlayerName}" BorderThickness="1" BorderBrush="Black" VerticalAlignment="Stretch" IsTextPredictionEnabled="False" TextChanged="PlayerName_TextChanged" Tag="{Binding Index}" FontFamily="Global User Interface"/>
				<Button Grid.Column="1" Style="{StaticResource BasicButton}" FontSize="32" Margin="3,0" Padding="0,-2,1,-1" Content="&#xE10A;" Tag="{Binding Index}" FontFamily="Segoe UI Symbol" IsEnabled="{Binding Children[0].Text,ElementName=grdPlayerTemplate,Converter={StaticResource IsNullOrWhiteSpace},ConverterParameter=NOT}" Click="DeletePlayer_Click"/>
				<Button Grid.Column="2" Style="{StaticResource BasicButton}" FontSize="32" Margin="0" Content="Move Up" Tag="{Binding Index}" IsEnabled="{Binding Children[0].Text,ElementName=grdPlayerTemplate,Converter={StaticResource IsNullOrWhiteSpace},ConverterParameter=NOT}" Opacity="{Binding Index,Converter={StaticResource HideValueOpacity}}" Click="MoveUp_Click"/>
			</Grid>
		</DataTemplate>
	</ItemsControl.ItemTemplate>
</ItemsControl>

And the declaration in my codebehind is:

Public NotInheritable Class PlayerNames : Inherits ItemsControl

As you can see, I am inheriting from ItemsControl and using several external resources in my XAML. However, the resources do not want to be accessed, and I receive the following error:

Cannot find a Resource with the Name/Key NoDeleteTextBox

Am I doing something wrong in ItemsControl.Resources? I have used these resources many times before in other controls and pages, so the only significant difference I can see between this and the other times I have used them is that this inherits from ItemsControl instead of UserControl or Page. Do I need to do something different because of this? Am I doing something else wrong? Any help would be appreciated. Thanks.

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Nathan Sokalski [e-mail] http://www.nathansokalski.com/

Answer 1

Nathan - post a reproduction app for me and we'll investigate.

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Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.