Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....//-------- //创建演示文稿 Presentation pres = new Presentation (); ISlide sld...void AddExcelChartInPrese ( Presentation pres , ISlide sld , Stream...