在WPF中，让button显示为一个Image，可以设置其BackGround为Image或者Content为Image，不过这两种方法都有一些问题~~

1、可以把Button的content设置为一个Image，不过图片的周围有个边框，影响美观~

<Button>

<Image Source="" />

</Button>

2、通过设置Background,不过还是有一个边框

3、重写一个ControlTemplate，并用ImagBrush 填充一个Image

<UserControl.Resources>

    <ControlTemplate x:Key="btnup" TargetType="{x:Type Button}">

            <Grid>

                <Rectangle HorizontalAlignment="Right" Width="11" Height="12">

                    <Rectangle.Fill>

                        <ImageBrush   ImageSource="images\ico_up.png" ></ImageBrush>

                    </Rectangle.Fill>

                </Rectangle>

            </Grid>

   </ControlTemplate>

   <ControlTemplate x:Key="btndown" TargetType="{x:Type Button}">

            <Grid>

                <Rectangle HorizontalAlignment="Right" Width="11" Height="12">

                    <Rectangle.Fill>

                        <ImageBrush ImageSource="images\ico_down.png" ></ImageBrush>

                    </Rectangle.Fill>

                </Rectangle>

            </Grid>

   </ControlTemplate>

</UserControl.Resources>

<Button Template="{StaticResource btnup}" />

<Button Template="{StaticResource btndown}" />