圆环图

在圆环图中指定中心间隙

为了指定圆环图中孔的大小，请按照以下步骤操作：

• 实例化 Presentation 类。
• 在幻灯片上添加圆环图。
• 指定圆环图中孔的大小。
• 将演示文稿写入磁盘。

在下面给出的示例中，我们设置了圆环图中孔的大小。

For complete examples and data files, please go to https://github.com/aspose-slides/Aspose.Slides-for-C

	// The path to the documents directory.
	const String outPath = u"../out/DoughnutChartHole_out.pptx";

	//Instantiate Presentation class that represents PPTX file
	SharedPtr<Presentation> pres = MakeObject<Presentation>();

	//Access first slide
	SharedPtr<ISlide> slide = pres->get_Slides()->idx_get(0);

	// Add chart with default data
	SharedPtr<IChart> chart = slide->get_Shapes()->AddChart(Aspose::Slides::Charts::ChartType::Doughnut, 0, 0, 500, 500);


	chart->get_ChartData()->get_SeriesGroups()->idx_get(0)->set_DoughnutHoleSize(90);
	
	// Write the presentation file to disk
	pres->Save(outPath, Aspose::Slides::Export::SaveFormat::Pptx);