uploading and reading from an excel file in asp.net core 2

Question

previously Asp.Net MVC had this third party library which easily allowed uploading and reading from an excel file called Excel Data Reader. We didn\'t need to have the file

Answer 1

I Could Read Excel File In 'Asp .Net Core' By This Code.

Import And Export Data Using EPPlus.Core.

    [HttpPost]
    public IActionResult ReadExcelFileAsync(IFormFile file)
    {
        if (file == null || file.Length == 0)
            return Content("File Not Selected");

        string fileExtension = Path.GetExtension(file.FileName);
        if (fileExtension != ".xls" && fileExtension != ".xlsx")
            return Content("File Not Selected");

        var rootFolder = @"D:\Files";
        var fileName = file.FileName;
        var filePath = Path.Combine(rootFolder, fileName);
        var fileLocation = new FileInfo(filePath);

        using (var fileStream = new FileStream(filePath, FileMode.Create))
        {
            await file.CopyToAsync(fileStream);
        }

         if (file.Length <= 0)
             return BadRequest(GlobalValidationMessage.FileNotFound);  

         using (ExcelPackage package = new ExcelPackage(fileLocation))
         {
          ExcelWorksheet workSheet = package.Workbook.Worksheets["Table1"];
          //var workSheet = package.Workbook.Worksheets.First();
          int totalRows = workSheet.Dimension.Rows;

          var DataList = new List();

          for (int i = 2; i <= totalRows; i++)
           {
                  DataList.Add(new Customers
                    {
                   CustomerName = workSheet.Cells[i, 1].Value.ToString(),
                   CustomerEmail = workSheet.Cells[i, 2].Value.ToString(),
                   CustomerCountry = workSheet.Cells[i, 3].Value.ToString()
                   });
           }

                _db.Customers.AddRange(customerList);
                _db.SaveChanges();
            }
        return Ok();
}