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    <p>The ErrorTemplate is an <a href="http://msdn.microsoft.com/en-us/library/ms743737.aspx" rel="noreferrer">adorner</a>, not a replacement for the control template. You include an <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.adornedelementplaceholder.aspx" rel="noreferrer"><code>AdornedElementPlaceholder</code></a> in the template where you want to leave space for the original control. So, your error template should look like: </p> <pre><code>&lt;Setter Property="Validation.ErrorTemplate"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate&gt; &lt;Grid Name="test"&gt; &lt;AdornedElementPlaceholder/&gt; &lt;Image Name="ErrorImage" Width="24" Height="24" Margin="0,0,4,0" Source="/Images/error.png" HorizontalAlignment="Right"/&gt; &lt;/Grid&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; </code></pre> <p>Since you also want to change the color of the border, I would use a TemplateBinding for the border brush and change that in the Validation.HasError trigger: </p> <pre><code>&lt;Setter Property="BorderBrush" Value="{StaticResource BorderColor}"/&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type TextBox}"&gt; &lt;Border Background="{StaticResource TextBackColor}" BorderBrush="{TemplateBinding BorderBrush}" x:Name="Bd" CornerRadius="4" BorderThickness="2"&gt; &lt;ScrollViewer Margin="0" x:Name="PART_ContentHost"/&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="Validation.HasError" Value="True"&gt; &lt;Setter Property="BorderBrush" Value="#d99"/&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; </code></pre>
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    1. COThanks Quartermeister. I was able to move the ControlTemplate into the Validation.ErrorTemplate section. The xaml definitely looks cleaner. For some reason the Validation.HasError trigger does not change the BorderBrush, so what I have done is to wrap the AdornedPlaceholder with a wrapping border colored red.
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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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