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我正在調試一個大的Silverlight應用程序，並且我在每一個表單上找到所有按鈕控件在進入下一個控件前接收選項卡焦點兩次。儘管如此，我無法在簡單的Hello World應用程序中重現此行爲。有趣的是，這個問題不會發生在同一個窗體中的HyperlinkButton控件上，只是Button。任何想法會導致這一點，或有些事情可以幫助我隔離這個原因？Silverlight - 按鈕控制製表符停止兩次神祕
在此先感謝。
[編輯]
如果我設置IsTabStop屬性設置爲false那麼它只是標籤上的按鈕一次。我毫不猶豫地將此作爲解決方案，因爲我真的很想知道問題的根源。
我將問題追溯到我們在資源文件中使用的隱式按鈕樣式。我真的很想知道爲什麼這個XAML會導致這種情況發生。
隱按鈕樣式XAML
<Style TargetType="Button" x:Key="DefaultButtonStyle">
<Setter Property="Background" Value="{StaticResource NormalBrush}"/>
<Setter Property="Foreground" Value="{StaticResource TextContentBrush}"/>
<Setter Property="FontFamily" Value="{StaticResource ContentFontFamily}"/>
<Setter Property="FontSize" Value="{StaticResource ContentFontSize}"/>
<Setter Property="Padding" Value="3"/>
<Setter Property="Padding" Value="10,3,10,3" />
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="BorderBrush" Value="{StaticResource NormalBorderBrush}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid x:Name="grid" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition From="MouseOver" GeneratedDuration="0:0:0.1" To="Pressed">
<VisualTransition.GeneratedEasingFunction>
<ExponentialEase EasingMode="EaseIn" Exponent="-2"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition From="Pressed" GeneratedDuration="0:0:0.1" To="MouseOver">
<VisualTransition.GeneratedEasingFunction>
<ExponentialEase EasingMode="EaseOut" Exponent="0"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition From="Normal" GeneratedDuration="0:0:0.01" To="MouseOver">
<VisualTransition.GeneratedEasingFunction>
<ExponentialEase EasingMode="EaseIn" Exponent="7"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
<VisualTransition From="MouseOver" GeneratedDuration="0:0:0.1" To="Normal">
<VisualTransition.GeneratedEasingFunction>
<CircleEase EasingMode="EaseIn"/>
</VisualTransition.GeneratedEasingFunction>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="MouseOverBorder">
<EasingDoubleKeyFrame KeyTime="0" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Control.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="contentPresenter">
<EasingColorKeyFrame KeyTime="0" Value="{StaticResource BaseColor2}"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="PressedBorder" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="1.0" KeySpline="0,0,0.0299999993294477,0.920000016689301"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="grid">
<EasingDoubleKeyFrame KeyTime="0:0:0.01" Value="1.05"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" Storyboard.TargetName="grid">
<EasingDoubleKeyFrame KeyTime="0:0:0.01" Value="1.05"/>
</DoubleAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Control.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="contentPresenter">
<EasingColorKeyFrame KeyTime="0" Value="{StaticResource BaseColor2}"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="0.75"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="0.3"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused" >
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1.0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="BaseBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1" CornerRadius="1" >
<Border.Background>
<SolidColorBrush Color="{StaticResource BaseColor7}"/>
</Border.Background>
<Grid>
<Border x:Name="Background" BorderBrush="{StaticResource NormalInnerBorderBrush}" Background="{TemplateBinding Background}"/>
<Border x:Name="MouseOverBorder" Opacity="0" Background="{StaticResource MouseOverBrush}" Margin="-0.5,-0.5,0.5,0.5"/>
<Border x:Name="PressedBorder" BorderThickness="{TemplateBinding BorderThickness}" Opacity="0" Background="{StaticResource MouseOverBrush}" RenderTransformOrigin="0.5,0.5" Margin="-1">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Border.RenderTransform>
</Border>
</Grid>
</Border>
<Rectangle x:Name="DisabledVisualElement" Fill="{StaticResource DisabledBackgroundBrush}" IsHitTestVisible="false" Opacity="0" RadiusY="1" RadiusX="1" Stroke="{StaticResource DisabledBackgroundBrush}"/>
<ContentControl x:Name="contentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Foreground="{TemplateBinding Foreground}" Padding="2" />
<Rectangle x:Name="FocusVisualElement" Stroke="{StaticResource FocusedBrush}" Margin="-1" Opacity="0" /> <!--IsHitTestVisible="false"-->
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
這是因爲第一個重點是在按鈕中的TextBlock;第二個重點是按鈕，之所以它甚至熱點在TextBlock上是因爲您有一個模板覆蓋默認樣式 – Neil 2011-03-25 07:50:55