Question

我正在尝试将样式应用到我的所有按钮上。一旦我将我的样式分配给第二个按钮并尝试运行我的应用程序，我就会收到错误：

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.dll
A first chance exception of type 'MS.Internal.WrappedException' occurred in System.Windows.dll
A first chance exception of type 'MS.Internal.WrappedException' occurred in System.Windows.dll

将我的风格应用于单个按钮即可。

这是我的风格：

<phone:PhoneApplicationPage.Resources>
        <Style x:Key="ButtonStyle1" TargetType="Button">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Grid Background="Transparent">
                            <VisualStateManager.VisualStateGroups>
                                <!--Define the states for the common states. The states in a 
                                        VisualStateGroup are mutually exclusive to each other.-->
                                <VisualStateGroup x:Name="CommonStates">
                                    <!--Define the VisualStates in this VistualStateGroup.-->
                                    <VisualState x:Name="Normal"/>
                                    <VisualState x:Name="MouseOver" />
                                    <VisualState x:Name="Pressed">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentContainer">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneBackgroundBrush}"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="ButtonBackground">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneForegroundBrush}"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ColorAnimation Duration="0" To="White" Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)" Storyboard.TargetName="ButtonBackground" d:IsOptimized="True"/>
                                        </Storyboard>                                        
                                    </VisualState>
                                    <VisualState x:Name="Disabled">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="Opacity" To="1"/>
                                        </Storyboard>
                                    </VisualState>
                                    </VisualStateGroup>
                                <!--Define the states for the focus states. The states in a 
                                        VisualStateGroup are mutually exclusive to each other.-->
                                <VisualStateGroup x:Name="FocusStates">
                                    <!--Define the VisualStates in this VistualStateGroup.-->
                                    <VisualState x:Name="Focused" />
                                    <VisualState x:Name="Unfocused" />
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Border x:Name="ButtonBackground" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="0" Margin="{StaticResource PhoneTouchTargetOverhang}" Background="{TemplateBinding Background}">
                                <ContentControl x:Name="ContentContainer" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </Border>
                        </Grid>
                        <!--The parts of the button control will be defined here.-->
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </phone:PhoneApplicationPage.Resources>

以下是我的按钮：

<Button Height="121" HorizontalAlignment="Left" Margin="14,61,0,0" Name="but1" VerticalAlignment="Top" Width="197" Background="#FF7D0000" BorderBrush="Black" Foreground="Red" BorderThickness="0" Padding="0" Style="{StaticResource ButtonStyle1}" />
<Button Height="121" HorizontalAlignment="Left" Margin="217,61,0,0" Name="but2" VerticalAlignment="Top" Width="200" Background="#FF7D0000" BorderBrush="Black" Foreground="Red" BorderThickness="0" Padding="0" Style="{StaticResource ButtonStyle1}" />

解决方案

我更改了它以反映“ContentContainer”，这是我想要在我的风格中修改的对象的名称。

<VisualState x:Name="Disabled">
   <Storyboard>
      <DoubleAnimation Duration="0" Storyboard.TargetName="ContentContainer" Storyboard.TargetProperty="Opacity" To="1"/>
   </Storyboard>
</VisualState>

Answer 1

如果它只是在代码之上它应该可以正常工作，但是如果你将任何按钮设置为禁用（IsEnabled = false），它将失败，因为在你的风格的禁用状态，故事板正在寻找一个名为DisabledVisualElement的元素，用于制作动画，

<VisualState x:Name="Disabled"> 
  <Storyboard> 
    <DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="Opacity" To="1"/> 
  </Storyboard> 
</VisualState>

然而，范围内不存在这样的元素。

删除此故事板或添加具有正确名称的元素可以解决您的问题。

WP7将样式应用于多个按钮

1 个答案: