WPF 无边框button

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。