Silverlight画图

     Silverlight不支持gif的图片格式，图片最好用jpg的，对于引用路径，如果在Image目录下，ImageSource填写Image/xxx.jpg，其他路径格式测试后不显示图片。先看一下运行后的效果图

                                              

下面是程序代码

.xaml:

 <Grid x:Name="LayoutRoot">
        <InkPresenter x:Name="inkPresenter"
                      MouseLeftButtonDown="inkPresenter_MouseLeftButtonDown"
                      MouseMove="inkPresenter_MouseMove"
                      MouseLeftButtonUp="inkPresenter_MouseLeftButtonUp"
                      Background="Transparent"
                      Grid.Row="0" Grid.ColumnSpan="2">
            <Rectangle Width="372" Height="400" RadiusX="20" RadiusY="20" Margin="20">
                <Rectangle.Fill>
                    <ImageBrush ImageSource="Image/wal.jpg" Opacity="0.5">
                    </ImageBrush>
                </Rectangle.Fill>
            </Rectangle>
           
        </InkPresenter>
   
    </Grid>

xaml.cs

        #region 属性封装
        Color cc_CurrentColor = Colors.Black;
        stroke ss_stroke;
        #endregion

        private void inkPresenter_MouseLeftButtonDown(object sender,MouseButtonEventArgs e)
        {
            inkPresenter.CaptureMouse();
            ss_stroke = new stroke();
            ss_stroke.DrawingAttributes.Color = cc_CurrentColor;
            ss_stroke.StylusPoints.Add(e.StylusDevice.GetStylusPoints(inkPresenter));
            inkPresenter.strokes.Add(ss_stroke);

        }

        private void inkPresenter_MouseMove(object sender,MouseEventArgs e)
        {
            if (ss_stroke!=null)
            {
                ss_stroke.StylusPoints.Add(e.StylusDevice.GetStylusPoints(inkPresenter));
            }

        }

        private void inkPresenter_MouseLeftButtonUp(object sender,MouseButtonEventArgs e)
        {
            ss_stroke = null;
            inkPresenter.ReleaseMouseCapture();

        }