reading spreadsheet with epplus code example

Example: epplus read excel

//create a list to hold all the values
List<string> excelData = new List<string>();

//read the Excel file as byte array
byte[] bin = File.ReadAllBytes("C:\\ExcelDemo.xlsx");

//or if you use asp.net, get the relative path
byte[] bin = File.ReadAllBytes(Server.MapPath("ExcelDemo.xlsx"));

//create a new Excel package in a memorystream
using (MemoryStream stream = new MemoryStream(bin))
using (ExcelPackage excelPackage = new ExcelPackage(stream))
{
    //loop all worksheets
    foreach (ExcelWorksheet worksheet in excelPackage.Workbook.Worksheets)
    {
        //loop all rows
        for (int i = worksheet.Dimension.Start.Row; i <= worksheet.Dimension.End.Row; i++)
        {
            //loop all columns in a row
            for (int j = worksheet.Dimension.Start.Column; j <= worksheet.Dimension.End.Column; j++)
            {
                //add the cell data to the List
                if (worksheet.Cells[i, j].Value != null)
                {
                    excelData.Add(worksheet.Cells[i, j].Value.ToString());
                }
            }
        }
    }
}