增加配置文件即可。
“
<dependentAssembly>
<assemblyIdentity name="NPOI.OOXML" publicKeyToken="0df73ec7942b34e1" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.2.1.0" newVersion="2.2.1.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="NPOI" publicKeyToken="0df73ec7942b34e1" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-2.2.1.0" newVersion="2.2.1.0" />
</dependentAssembly>
未能加载文件或程序集Office, Version=2.2.0.0, Culture=neutral, PublicKeyToken=null或它的某一个依赖项
原文：https://www.cnblogs.com/blogs2014/p/14086139.html