Import and Export Excel file in ASP .NET Core 3.1 Razor age

In this article we will discuss how to import and export excel file using ASP .NET Core 3.1 razor pages. We will discuss the below points:

>>  How to import Excel file in .NET Core and preview the uploaded excel file?
>>  How to export the excel file ?

NPOI Package
NPOI is a free tool, which supports xls, xlsx, and docx extensions. This project is the .NET version of POI Java project at http://poi.apache.org/. POI is an open source project, which can help you read/write XLS, DOC, PPT files. It covers most features of Excel, like styling, formatting, data formulas, extract images, etc. The good thing is, it doesn't require Microsoft Office to be installed on the server. NPOI is an open source component, and you can use it everywhere.

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