Download an Excel document in ASP.NET Core 3.0. Here is the complete source code of the action method that can be used to download an Excel document. public IActionResult DownloadExcelDocument() ...

First off, let’s create an ASP.NET Core project in Visual Studio 2019. Following these steps will create a new ASP.NET Core MVC 5 project in Visual Studio 2019. Launch the Visual Studio IDE.