[OpenXml] Read/Write row/cell from excel

        public static void test(){

            using (SpreadsheetDocument document = SpreadsheetDocument.Open("test.xlsx", true))

            {

                WorkbookPart workbookPart = document.WorkbookPart;



                string relId = workbookPart.Workbook.Descendants<Sheet>().First(sheet => sheet.Name.Value.ToLower().Equals("sheet1")).Id;

                WorksheetPart worksheetpart = (WorksheetPart)workbookPart.GetPartById(relId);



                DocumentFormat.OpenXml.Spreadsheet.Worksheet worksheet = worksheetpart.Worksheet;

                SheetData sheetData = worksheet.GetFirstChild<SheetData>();



                for (int i = 2; i <= 3; i++)

                {

                    Row row = new Row() { RowIndex = (uint)i };

                    row.Append(new Cell() { CellReference = "A" + i, DataType = CellValues.String, CellValue = new CellValue("kaka") });//, StyleIndex = styleIndex });

                    row.Append(new Cell() { CellReference = "B" + i, DataType = CellValues.String, CellValue = new CellValue("2") });//, StyleIndex = styleIndex });

                    row.Append(new Cell() { CellReference = "C" + i, DataType = CellValues.String, CellValue = new CellValue("GENERAL MANAGEMENT") });//, StyleIndex = styleIndex });

                    row.Append(new Cell() { CellReference = "D" + i, DataType = CellValues.String, CellValue = new CellValue("2") });//, StyleIndex = styleIndex });

                    row.Append(new Cell() { CellReference = "E" + i, DataType = CellValues.String, CellValue = new CellValue((1 == 1).ToString()) });//, StyleIndex = styleIndex });

                    sheetData.Append(row);

                }



                // loop each row to get value;

                string cellValue = GetCellValue(sheetData.Descendants<Row>().ElementAt<Row>(0), "A", getSharedString(document));



                worksheet.Save();

            }

        }



        private static List<SharedStringItem> getSharedString(SpreadsheetDocument document)

        {

            WorkbookPart workbookPart = document.WorkbookPart;

            return workbookPart.SharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ToList<SharedStringItem>();

        }



        // cell could be null

        private static Cell GetCell(Row row, string columnName)

        {

            return row.Descendants<Cell>().FirstOrDefault(p => p.CellReference == columnName + row.RowIndex);

        }



        // call getSharedString

        // call GetCell

        // => retrieve cell value

        public static string GetCellValue(Row row, string columnName, List<SharedStringItem> sharedStrings)

        {

            Cell cell = GetCell(row, columnName);



            if (cell == null)

            {

                return null;

            }



            string value = "";



            if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)

            {

                SharedStringItem item = sharedStrings.ElementAt<SharedStringItem>(Int32.Parse(cell.CellValue.Text));

                value = item.InnerText;

            }

            else

            {

                value = cell.CellValue.Text;

            }

            return value;

        }