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.... save ( "presentation_out.pptx" ,...为保留页面编号而保存幻灯片添加的方法 新增方法如下: void IPresentation.save(string fname, int[] slides,...