WPF 无边框button
Posted 樂兒
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项目中，有时会需要无边框的Button，如果没有特别的其他功能需要，我们可以更简单的实现这一点：
<Button Content="myButton" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}"/>
当然，上面的按钮类似于ToolBar风格，移动到上面是蓝色背景。
如果想进一步简单修改，可以用以下方法，实现移动到按钮上出现阴影，按下时内容缩小的功能：
<Button Command="{Binding RefreshSQLCmd}" ToolTip="{DynamicResource Refresh}" SnapsToDevicePixels="True" Background="Transparent" Height="30" Width="30" BorderBrush="Transparent"> <Button.Template> <ControlTemplate TargetType="{x:Type Button}"> <Grid> <Rectangle Height="30" Width="30"> <Rectangle.Fill> <ImageBrush ImageSource="Images/refresh.ico"></ImageBrush> </Rectangle.Fill> </Rectangle> <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Center" Content="{TemplateBinding Content}"></ContentPresenter> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Setter Property="Image.Effect"> <Setter.Value> <DropShadowEffect BlurRadius="20" ShadowDepth="2" Color="#FF446FCB" Opacity="0.8"/> </Setter.Value> </Setter> </Trigger> <Trigger Property="IsPressed" Value="True"> <Setter Property="RenderTransform"> <Setter.Value> <ScaleTransform ScaleX="0.95" ScaleY="0.95"/> </Setter.Value> </Setter> <Setter Property="RenderTransformOrigin" Value=".5,.5"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Button.Template> </Button>
使用图片作为按钮外观时，如果需要IsEnable为false时变灰，可以通过自定义如下：
<Style x:Key="myButton1" TargetType="Button"> <Style.Resources> <Style TargetType="Image"> <Style.Triggers> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Opacity" Value="0.5" /> </Trigger> </Style.Triggers> </Style> </Style.Resources> </Style>
如果想更复杂的，如下面的圆形按钮，界面上的Button只需要Style绑定就可以了：
<Style x:Key="ButtonStyle1" TargetType="Button"> <Setter Property="Foreground" Value="Black"/> <!--修改模板属性--> <Setter Property="Template"> <Setter.Value> <!--控件模板--> <ControlTemplate TargetType="Button"> <!--背景色--> <Border x:Name="back" Opacity="0.8" CornerRadius="3"> <Border.BitmapEffect> <!--边框为0的外发光效果--> <OuterGlowBitmapEffect Opacity="0.7" GlowSize="0" GlowColor="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" /> </Border.BitmapEffect> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1.5"> <GradientBrush.GradientStops> <GradientStopCollection> <GradientStop Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" Offset="0"/> <GradientStop Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(Button.Background).(SolidColorBrush.Color)}" Offset="0.4"/> <GradientStop Color="#FFF" Offset="1"/> </GradientStopCollection> </GradientBrush.GradientStops> </LinearGradientBrush> </Border.Background> <!--前景色及边框--> <Border x:Name="fore" BorderThickness="1" CornerRadius="3" BorderBrush="#5555"> <!--fore 实现按钮的边框和高亮反光效果，半透明的黑色1像素边框，使边框的色彩可以和背景色混合起来--> <!--背景同样采用的渐变笔刷，起始值和终止值的位置几乎贴在一起，从而形成比较鲜明的反光度对比。--> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientBrush.GradientStops> <GradientStopCollection> <GradientStop Color="#6FFF" Offset="0.5"/> <GradientStop Color="#1111" Offset="0.51"/> </GradientStopCollection> </GradientBrush.GradientStops> </LinearGradientBrush> </Border.Background> <!--按钮内容--> <ContentPresenter x:Name="content" HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding Content}"> <!--一个不太明显的阴影滤镜以增强显示效果--> <ContentPresenter.BitmapEffect> <DropShadowBitmapEffect Color="#000" Direction="-90" ShadowDepth="2" Softness="0.1" Opacity="0.3" /> </ContentPresenter.BitmapEffect> </ContentPresenter> </Border> </Border> <!--触发器--> <ControlTemplate.Triggers> <!--鼠标移入移出--> <Trigger Property="IsMouseOver" Value="True"> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation To="6" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <ColorAnimation To="#AFFF" BeginTime="0:0:0.2" Duration="0:0:0.2" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation To="#3FFF" BeginTime="0:0:0.2" Duration="0:0:0.2" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.ExitActions> </Trigger> <!--按钮按下弹起--> <Trigger Property="IsPressed" Value="True"> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation To="3" Duration="0:0:0.1" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <ColorAnimation To="#3AAA" Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation To="#2111" Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Duration="0:0:0.1" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.ExitActions> </Trigger> <!--按钮失效--> <!--当按钮失效时，要改变很多东西，首先将文字颜色设为灰色，然后依次创建了改变外发光效果大小、改变内容阴影效果不透明度、 改变内容阴影效果角度、改变内容阴影效果颜色、改变按钮边框颜色、改变上部反光区域颜色、改变下部反光区域颜色的动画。 这里将先前对内容应用的阴影效果彻底改变，使之产生凹陷的效果--> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Foreground" Value="#B444"/> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation To="0" Duration="0:0:0.3" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <DoubleAnimation To="1" Duration="0:0:0.1" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Opacity)" /> <DoubleAnimation To="-135" Duration="0:0:0.1" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Direction)" /> <ColorAnimation To="#FFF" Duration="0:0:0.3" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Color)" /> <ColorAnimation To="#D555" Duration="0:0:0.3" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" /> <ColorAnimation To="#CEEE" Duration="0:0:0.3" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation To="#CDDD" Duration="0:0:0.3" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Duration="0:0:0.1" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" /> <DoubleAnimation Duration="0:0:0.1" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Opacity)" /> <DoubleAnimation Duration="0:0:0.1" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Direction)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="content" Storyboard.TargetProperty="(ContentPresenter.BitmapEffect).(DropShadowBitmapEffect.Color)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" /> <ColorAnimation Duration="0:0:0.1" Storyboard.TargetName="fore" Storyboard.TargetProperty="(Border.Background).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" /> </Storyboard> </BeginStoryboard> </Trigger.ExitActions> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
以上是整理了一下自己常用的方法和网络上的一个实例，对自定义控件有一个参考。
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