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    <p>The reason is that, you set the Trigger's Property to <strong>Canvas.IsMouseOver</strong>, so it will fire when the Canvas is Mouser Over. But as you set the Trigger in the Path's Style, this will limited within the area of the Path.</p> <p>I know the IsMouseOver is a Property, but i want to use MouseEnter as an example. MouseEnter is a Routed Event, so when the mouse is hover the <strong>TextBlock</strong>, it will fire as Routed Event, the TextBlock's MouseEnter Event will fire, and maybe the TextBlock's IsMouseOver became true, not the Path and the Canvas. Because now the TextBlock's ZIndex is the highest.</p> <p>So, what we need to do is let the TextBlock's IsMouseOver don't change when it get hovered.</p> <p>We can set the TextBlock's <strong>IsHitTestVisible="False"</strong>;</p> <p>And the Code can be like this: I have tested this code, it works!</p> <pre><code>&lt;Canvas Background="Transparent"&gt; &lt;Path Name="PathNodeType" StrokeThickness="1"&gt; &lt;Path.Style&gt; &lt;Style TargetType="Path"&gt; &lt;Setter Property="Stroke" Value="Black" /&gt; &lt;Setter Property="Fill" Value="LightGray" /&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="IsMouseOver" Value="True"&gt; &lt;Setter Property="Stroke" Value="Blue" /&gt; &lt;Setter Property="Fill" Value="LightBlue" /&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Path.Style&gt; &lt;Path.Data&gt; &lt;PathGeometry&gt; &lt;PathGeometry.Figures&gt; &lt;PathFigureCollection&gt; &lt;PathFigure IsClosed="True" StartPoint="20,40"&gt; &lt;PathFigure.Segments&gt; &lt;PathSegmentCollection&gt; &lt;ArcSegment IsLargeArc="True" Point="50,40" RotationAngle="45" Size="10,10" SweepDirection="Clockwise" /&gt; &lt;LineSegment Point="50,60" /&gt; &lt;LineSegment Point="20,60" /&gt; &lt;/PathSegmentCollection&gt; &lt;/PathFigure.Segments&gt; &lt;/PathFigure&gt; &lt;/PathFigureCollection&gt; &lt;/PathGeometry.Figures&gt; &lt;/PathGeometry&gt; &lt;/Path.Data&gt; &lt;/Path&gt; &lt;TextBlock Margin="22,40,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" FontWeight="Bold" Text="AND" IsHitTestVisible="False" TextWrapping="Wrap" /&gt; &lt;/Canvas&gt; </code></pre>
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    1. COThanks for the help. I'd seen IsHitTestVisible around on various websites, but I hadn't looked into what it did yet. Looks like I need to read up on it a bit. :)
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    2. COIsHitTestVisible is very useful when you want to let a control become transparent to Interaction.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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