Read excel file in blazor

Hello.
I'm trying to read an excel file in blazor. It goes well as long as I have direct path to the file "FilePath", which can be seen in the code below. But I need to drop it and open the file directly from the InputFile button so I can open any excel file. Is it possible? Can anyone help?

public List<Order> ReadExcel()
        {
            List<Order> orders = new List<Order>();
            string FilePath = "C:/Users/Medarbejder 2/Desktop/Ny mappe/Benny/Posteringer2.xlsx";
            FileInfo existingFile = new FileInfo(FilePath);
            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;

            using (ExcelPackage package = new ExcelPackage(existingFile))
            {
                ExcelWorksheet worksheet = package.Workbook.Worksheets.FirstOrDefault();
                int colCount = worksheet.Dimension.End.Column;
                int rowCount = worksheet.Dimension.End.Row;

                for (int row = 1; row <= rowCount; row++)
                {
                    Order order = new Order();
                    for (int col = 1; col <= colCount; col++)
                    {
                        if (col == 1) order.Kontonummer = Convert.ToInt32(worksheet.Cells[row, col].Value.ToString());
                        else if (col == 2) order.Navn = worksheet.Cells[row, col].Value.ToString();
                        else if (col == 3) order.Type = worksheet.Cells[row, col].Value.ToString();
                        else if (col == 4) order.Moms = worksheet.Cells[row, col].Value.ToString();
                    }
                    orders.Add(order);
                }
            }
            return orders;
        }

protected void ReadExcel()
    {
        orders = data.ReadExcel();
    }