<!--1V按钮样式-->
    <Style TargetType="Button" x:Key="UButtonStyleOneVideo">
        <Setter Property="Height" Value="20" />
        <Setter Property="Width" Value="20" />
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="Cursor" Value="Hand"></Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Image Name="img" Source="/images/1nor.png"  />
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True"  >
                            <Setter Property="Source" TargetName="img" Value="/images/1sel.png"></Setter>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True"  >
                            <Setter Property="Source" TargetName="img" Value="/images/1sel.png"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

默认一张图片，通过触发器修改背景图

如果新增文件，记得在App.xaml导入样式

<Application x:Class="XX.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:XX.Zhifa"
             StartupUri="LoginWin.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Style/UButton.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

在窗口中引入样式

 <Button Name="btnOneCamera"  VerticalAlignment="Center" Content="" Style="{DynamicResource UButtonStyleOneVideo}"Margin="0 0 0 0"  >