注释云朵边框样式 ​

// 获取指定页面对象
CPDFPage page = document.PageAtIndex(0);

// 创建多边形注释
CPDFPolygonAnnotation polygon = page.CreateAnnot(C_ANNOTATION_TYPE.C_ANNOTATION_POLYGON) as CPDFPolygonAnnotation;
polygon.SetPoints(new List<CPoint> { new CPoint(100, 100), new CPoint(200, 100), new CPoint(200, 200), new CPoint(100, 200) });
polygon.SetRect(new CRect(100,200,200,100));
polygon.SetLineWidth(1);
polygon.SetLineColor(new byte[] { 255, 0, 0 });

// 设置边框虚线样式
polygon.SetBorderStyle(C_BORDER_STYLE.BS_DASHDED, new float[]{2,1});

// 设置云朵边框样式
CPDFBorderEffector borderEffector = new CPDFBorderEffector(C_BORDER_TYPE.C_BORDER_TYPE_Cloud, C_BORDER_INTENSITY.C_INTENSITY_ONE);
polygon.SetAnnotBorderEffector(borderEffector);

polygon.UpdateAp();