WPF图片,DataGrid等实现圆角

<grid horizontalalignment="center" verticalalignment="center">
        <grid.rowdefinitions>
            <rowdefinition height="auto"/>
            <rowdefinition/>
        </grid.rowdefinitions>
        <grid grid.row="1">
            <grid rendertransformorigin="0.5,0.5">
                <grid.rendertransform>
                    <!--旋转-->
                    <rotatetransform angle="{binding elementname=angle, path=value}"/>
                </grid.rendertransform>
                <!--圆角半径-->
                <border name="mask" cornerradius="{binding elementname=cornerradius, path=value}" background="white"/>
                <grid>
                    <!--参考https://msdn.microsoft.com/zh-cn/library/bb979637(v=vs.95).aspx-->
                    <grid.opacitymask>
                        <visualbrush visual="{binding elementname=mask}"/>
                    </grid.opacitymask>
                    <!--这里可以放任何内容,均可实现圆角-->
                    <image source="1104200s231-18.jpg"/> 
                </grid>
            </grid>
        </grid>
        <!--控制按钮-->
        <grid grid.row="0" background="#a0ffffff">
            <grid.columndefinitions>
                <columndefinition width="auto"/>
                <columndefinition/>
                <columndefinition width="auto"/>
                <columndefinition/>
            </grid.columndefinitions>
            <textblock grid.column="0" text="corner radius"/>
            <slider grid.column="1" name="cornerradius" minimum="0" maximum="400" margin="5,0,5,0"/>
            <textblock grid.column="2" text="angle" margin="5,0,0,0"/>
            <slider grid.column="3" name="angle" minimum="0" maximum="360" margin="5,0,0,0"/>
        </grid>
    </grid>