PDFlib是一个帮助你生成PDF文件的控件.它提供了一组简单易使用的API接口，可以很容易的在服务器端或客户端生成PDF文件.-help you generate PDF document control. It offers a simple and easy to use API, it is quite easy on the server side or the client generate PDF documents.

简单操作Excel文件，不需要任何Office类和客户端，非常简单-Simple operation Excel file, don t need any Office and the client, is very simple