试用插入代码

<Style x:Key="ButtonStyle34" TargetType="{x:Type Button}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <StackPanel Orientation="Horizontal" Background="Transparent" Margin="0,0,0,0" >
                        <Image Name="ImgBtnBg3" Margin="0,0,0,2" Source="/Resources/Res/Delete_I.png" Stretch="Fill" Width="54"/>
                    </StackPanel>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Source" Value="/Resources/Res/Geng_II.png" TargetName="ImgBtnBg3"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter Property="Source" Value="/Resources/Res/Geng_III.png" TargetName="ImgBtnBg3"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="Source" Value="/Resources/Res/Delete_I.png" TargetName="ImgBtnBg3"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>