WPF 按鈕背景圖片

<Window x:Class="WpfApplication4.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">
    <Window.Resources>
        <!--定義按鈕樣式-->
        <Style x:Key="buttonTemplate" TargetType="Button" >
            <!--修改模板屬性-->
            <Setter Property="Template">
                <Setter.Value>
                    <!--控制元件模板-->
                    <ControlTemplate TargetType="Button">
                        <!--只有Grid才能裝下這麼多Child-->
                        <Grid>
                            <!--帶特效的底層背景-->
                            <Border x:Name="back" Opacity="0.8" CornerRadius="2">
                                <Border.BitmapEffect>
                                    <OuterGlowBitmapEffect Opacity="0.8" GlowSize="0" GlowColor="Red" />
                                </Border.BitmapEffect>
                                <Rectangle Width="49" Height="49">
                                    <Rectangle.Fill>
                                        Red
                                    </Rectangle.Fill>
                                </Rectangle>
                                <!--按鈕呈矩形-->
                            </Border>
                            <Rectangle x:Name="outerCircle" Width="50" Height="50">
                                <Rectangle.Fill>
                                    <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                        <GradientStop Offset="0" Color="DarkOliveGreen"/>
                                        <GradientStop Offset="1" Color="Azure"/>
                                    </LinearGradientBrush>
                                    </Rectangle.Fill>
                                </Rectangle>
                            <Rectangle Width="40" Height="40">
                                <Rectangle.Fill>
                                    <ImageBrush  Stretch="Fill" ImageSource="/WpfApplication4;component/Images/png-0095.png" />
                                </Rectangle.Fill>
                            </Rectangle>
                            <!--按鈕內容-->
                            <Border>
                                <TextBlock x:Name="content" HorizontalAlignment="Center" VerticalAlignment="Center" Text="{TemplateBinding  Content}">
                                </TextBlock>
                            </Border>
                        </Grid>
                        <!--觸發器-->
                        <ControlTemplate.Triggers>
                            <Trigger Property="Button.IsMouseOver" Value="True">
                                <Trigger.EnterActions>
                                    <BeginStoryboard>
                                        <Storyboard>
                                            <DoubleAnimation To="10" Duration="0:0:0.2" Storyboard.TargetName="back" Storyboard.TargetProperty="(Border.BitmapEffect).(OuterGlowBitmapEffect.GlowSize)" />
                                            <ColorAnimation To="#4FFF" BeginTime="0:0:0.2" Duration="0:0:0.2" Storyboard.TargetName="outerCircle" Storyboard.TargetProperty="(Ellipse.Fill).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
                                            <ColorAnimation To="#3FFF" BeginTime="0:0:0.2" Duration="0:0:0.2" Storyboard.TargetName="outerCircle" Storyboard.TargetProperty="(Ellipse.Fill).(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="outerCircle" Storyboard.TargetProperty="(Ellipse.Fill).(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" />
                                            <ColorAnimation Duration="0:0:0.2" Storyboard.TargetName="outerCircle" Storyboard.TargetProperty="(Ellipse.Fill).(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" />
                                        </Storyboard>
                                    </BeginStoryboard>
                                </Trigger.ExitActions>
                            </Trigger>
                            <Trigger Property="Button.IsPressed" Value="True">
                                <Setter Property="RenderTransform">
                                    <Setter.Value>
                                        <ScaleTransform ScaleX=".9" ScaleY=".9"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="RenderTransformOrigin" Value=".5,.5"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Button Content="Button" Style="{StaticResource buttonTemplate}" Height="105" HorizontalAlignment="Left" Margin="153,108,0,0" Name="button1" VerticalAlignment="Top" Width="201">
        </Button>
    </Grid>
</Window>