NPOI 是 POI 项目的 .NET 版本。POI是一个开源的Java读写Excel、WORD等微软OLE2组件文档的项目。

使用 NPOI 你就可以在没有安装 Office 或者相应环境的机器上对 WORD/EXCEL 文档进行读写。NPOI是构建在POI 3.x版本之上的，它可以在没有安装Office的情况下对Word/Excel文档进行读写操作。-NPOI is the POI project. NET version of. POI is an open source Java to read and write Excel, WORD and other Microsoft OLE2 component documentation project. Use NPOI you can not have Office installed on the machine, or the appropriate environment for WORD/EXCEL documents to read and write. NPOI is built on top of POI 3.x version, which can be the case without installing Office for Word/Excel documents to read and write operations.