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.... 验证附件 TNEF 格式 - 该 Attachment.IsTnef 属性指示消息附件是否为 TNEF 格式的消息。...