WinApp C# อยากแก้ Excel โดยไม่ใช้ Microsoft.Office.Interop.Excel หรือ ExcelLibrary.SpreadSheet.Workbook

// using 
using OfficeOpenXml;
using OfficeOpenXml.Style;


tring file = @"F:\REPORT\1111\Chromium (III)_25570804 095424.Report";

            using (ExcelPackage package = new ExcelPackage(new System.IO.FileInfo(file)))
            {
                // add a new worksheet to the empty workbook
                ExcelWorksheet worksheet = package.Workbook.Worksheets[0];
                MessageBox.Show(worksheet.Cells[2,7].Value.ToString());

                // --------- Data and styling goes here -------------- //

            }

           FileInfo fi = new FileInfo("C:\\Test1.Report");
            ExcelPackage ep = new ExcelPackage(fi);
            ExcelWorkbook WB;
            ExcelWorksheet ws;
            WB = ep.Workbook;
            MessageBox.Show(WB.Worksheets.Count.ToString());
            ws = WB.Worksheets[1];
            ws.Cells["A1"].Value = "This Cell Change by Coding";
            ep.Save();