Question

这让我很沮丧。我有一个简单的WPF切换按钮，有两个IsChecked触发器。一个值为true，另一个值为false。没有选中按钮时，它工作正常，我的样式为false;但是，当IsChecked为true时，系统永远不会应用该样式。它总是只使用默认的蓝色镀铬窗口样式。有什么想法吗？

<ToggleButton Content="Control 1" Width="200" Margin="0,0,0,10" Focusable="False">
    <ToggleButton.Resources>
        <Style TargetType="{x:Type ToggleButton}">
            <Style.Triggers>
                <Trigger Property="IsChecked" Value="True">
                    <Setter Property="Background">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                                <GradientStop Color="#FFF3F3F3" Offset="1"/>
                                <GradientStop Color="LawnGreen" Offset="0.307"/>
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                </Trigger>
                <Trigger Property="IsChecked" Value="False">
                    <Setter Property="Background">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                                <GradientStop Color="#FFF3F3F3" Offset="1"/>
                                <GradientStop Color="Red" Offset="0.307"/>
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>
    </ToggleButton.Resources>
</ToggleButton>

非常感谢任何帮助。我确信这是显而易见的，我只是在俯视。

Answer 1

ToggleButton.IsChecked切换时的布局似乎是模板的一部分。如果覆盖模板，则应该能够正确设置值。见Override ToggleButton Style

示例：

<ToggleButton Content="Control 1" Focusable="False">
   <ToggleButton.Template>
      <ControlTemplate TargetType="{x:Type ToggleButton}">
         <Border CornerRadius="3" Background="{TemplateBinding Background}">
            <ContentPresenter Margin="3" 
               HorizontalAlignment="Center" 
               VerticalAlignment="Center"/>
         </Border>
         <ControlTemplate.Triggers>
            <Trigger Property="IsChecked" Value="True">
               <Setter Property="Background">
                  <Setter.Value>
                     <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                        <GradientStop Color="#FFF3F3F3" Offset="1"/>
                        <GradientStop Color="LawnGreen" Offset="0.307"/>
                     </LinearGradientBrush>
                  </Setter.Value>
               </Setter>
            </Trigger>
            <Trigger Property="IsChecked" Value="False">
               <Setter Property="Background">
                  <Setter.Value>
                     <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                        <GradientStop Color="#FFF3F3F3" Offset="1"/>
                        <GradientStop Color="Red" Offset="0.307"/>
                     </LinearGradientBrush>
                  </Setter.Value>
               </Setter>
            </Trigger>
            </ControlTemplate.Triggers>
         </ControlTemplate>
      </ToggleButton.Template>
   </ToggleButton>

Answer 2

我知道，我的回答没有什么新内容，但 newb 建议的模板对我来说似乎非常简单。所以我公开了我自己的ControlTemplate版本。它可能对某人有用。

<ToggleButton Width="100" Height="100">
    <ToggleButton.Template>
        <ControlTemplate TargetType="{x:Type ToggleButton}">
            <Border BorderBrush="Orange" 
                    BorderThickness="3" 
                    CornerRadius="3" 
                    Margin="1" 
                    Name="Border" 
                    Background="{TemplateBinding Background}">
                <Grid>
                    <Rectangle Name="FocusCue" 
                            Visibility="Hidden" 
                            Stroke="Black"
                            StrokeThickness="1" 
                            StrokeDashArray="1 2"
                            SnapsToDevicePixels="True" ></Rectangle>
                    <ContentPresenter  Margin="3" 
                                    HorizontalAlignment="Center" 
                                    VerticalAlignment="Center"/>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsChecked" Value="True">
                    <Setter TargetName="Border" Property="Background" Value="IndianRed" />
                    <Setter TargetName="Border" Property="BorderBrush" Value="DarkKhaki" />
                </Trigger>
                <Trigger Property="IsChecked" Value="False">
                    <Setter TargetName="Border" Property="Background" Value="Red" />
                    <Setter TargetName="Border" Property="BorderBrush" Value="Orange" />
                </Trigger>
                <Trigger Property="IsKeyboardFocused" Value="True">
                    <Setter TargetName="FocusCue" Property="Visibility" Value="Visible" />
                </Trigger>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter TargetName="Border" Property="Background" Value="DarkRed" />
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </ToggleButton.Template>
</ToggleButton>

WPF ToggleButton IsChecked触发器

2 个答案: