以下のような検証テンプレートがあります。ただし、コントロール内またはコントロールの左側にエラー アイコンを設定できます。コントロールの右側(テキストボックスの外側と右側)で点滅させる方法を教えてください。
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>
<Storyboard x:Key="FlashErrorIcon">
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00"
Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Hidden}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:00.2000000" Value="{x:Static Visibility.Visible}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:00.4000000" Value="{x:Static Visibility.Hidden}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:00.6000000" Value="{x:Static Visibility.Visible}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:00.8000000" Value="{x:Static Visibility.Hidden}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:01" Value="{x:Static Visibility.Visible}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
<Style x:Key="myErrorTemplate" TargetType="Control">
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="True">
<Ellipse DockPanel.Dock="Left"
ToolTip="{Binding ElementName=myTextbox,
Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"
Width="15" Height="15"
Margin="-25,0,0,0"
StrokeThickness="1" Fill="Red" >
<Ellipse.Stroke>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="#FFFA0404" Offset="0"/>
<GradientStop Color="#FFC9C7C7" Offset="1"/>
</LinearGradientBrush>
</Ellipse.Stroke>
<Ellipse.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource FlashErrorIcon}"/>
</EventTrigger>
</Ellipse.Triggers>
</Ellipse>
<TextBlock DockPanel.Dock="Left"
ToolTip="{Binding ElementName=myControl,
Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"
Foreground="White"
FontSize="11pt"
Margin="-15,5,0,0" FontWeight="Bold">!
<TextBlock.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource FlashErrorIcon}"/>
</EventTrigger>
</TextBlock.Triggers>
</TextBlock>
<Border BorderBrush="Red" BorderThickness="1">
<AdornedElementPlaceholder Name="myControl"/>
</Border>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="true">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={x:Static RelativeSource.Self},
Path=(Validation.Errors)[0].ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="TextBox" BasedOn="{StaticResource myErrorTemplate}" />