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POWPF Custom Control - Designer looks fine, but I get a runtime issue
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  1. POWPF Custom Control - Designer looks fine, but I get a runtime issue
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    copied!<p>MainWindow.xaml</p> <pre><code>&lt;Window x:Class="MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:my="clr-namespace:MyStuff;assembly=MyStuff" Title="MainWindow" Height="350" Width="525"&gt; &lt;Grid&gt; &lt;TabControl Margin="5"&gt; &lt;TabItem Header="Start Page" /&gt; &lt;my:XTabItem Header="Tab 1" Image="Resources/icon1.png" /&gt; &lt;/TabControl&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>Generic.xaml</p> <pre><code>&lt;ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MyStuff" &gt; &lt;!-- XTabItem --&gt; &lt;Style TargetType="{x:Type local:XTabItem}"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type local:XTabItem}"&gt; &lt;Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Image Source="{Binding Path=Image, RelativeSource={RelativeSource TemplatedParent}}" Stretch="UniformToFill" MaxHeight="24" /&gt; &lt;TextBlock Text="{TemplateBinding Header}" /&gt; &lt;Button Content="X" /&gt; &lt;/StackPanel&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/ResourceDictionary&gt; </code></pre> <p>XTabItem.cs</p> <pre><code>using System; using System.ComponentModel; using System.Windows; using System.Windows.Controls; using System.Windows.Media; namespace MyStuff { public class XTabItem : TabItem { #region Dependency Properties public static readonly DependencyProperty ImageProperty; #endregion #region Constructors / Initializer static XTabItem() { //Initialize the control as "lookless". DefaultStyleKeyProperty.OverrideMetadata(typeof(XTabItem), new FrameworkPropertyMetadata(typeof(XTabItem))); //Setup the dependency properties. ImageProperty = DependencyProperty.Register("Image", typeof(ImageSource), typeof(XTabItem), new UIPropertyMetadata(null)); } #endregion #region Custom Control Properties (Image) /// &lt;summary&gt; /// The image (icon) displayed by inside the tab header. /// &lt;/summary&gt; /// &lt;remarks&gt;The image is specified in XAML as an absolute or relative path.&lt;/remarks&gt; [Description("The image displayed by the button"), Category("Optional Properties")] public ImageSource Image { get { return (ImageSource)GetValue(ImageProperty); } set { SetValue(ImageProperty, value); } } #endregion } } </code></pre> <p>Exception at line #9 () : XamlParseException : 'Provide value on 'System.Windows.Baml2006.TypeConverterMarkupExtension' threw an exception.' Line number '9' and line position '27'.</p>
 

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