csharp: Export DataSet into Excel

 /// <summary>
        /// Export DataSet into Excel
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form3_Load(object sender, EventArgs e)
        {
            //Create an Emplyee DataTable
            DataTable employeeTable = new DataTable("Employee");
            employeeTable.Columns.Add("Employee ID");
            employeeTable.Columns.Add("Employee Name");
            employeeTable.Rows.Add("1", "涂聚文");
            employeeTable.Rows.Add("2", "geovindu");
            employeeTable.Rows.Add("3", "李蘢怡");
            employeeTable.Rows.Add("4", "ноппчц");
            employeeTable.Rows.Add("5", "ニヌネハヒフキカォноппчц");
            //Create a Department Table
            DataTable departmentTable = new DataTable("Department");
            departmentTable.Columns.Add("Department ID");
            departmentTable.Columns.Add("Department Name");
            departmentTable.Rows.Add("1", "IT");
            departmentTable.Rows.Add("2", "HR");
            departmentTable.Rows.Add("3", "Finance");

            //Create a DataSet with the existing DataTables
            DataSet ds = new DataSet("Organization");
            ds.Tables.Add(employeeTable);
            ds.Tables.Add(departmentTable);

            ExportDataSetToExcel(ds);
        }

        /// <summary>
        /// This method takes DataSet as input paramenter and it exports the same to excel
        /// </summary>
        /// <param name="ds"></param>
        private void ExportDataSetToExcel(DataSet ds)
        {
            //Creae an Excel application instance
            //EXCEL组件接口
            System.Reflection.Missing miss = System.Reflection.Missing.Value;
            Excel.Application excelApp = new Excel.Application();
            excelApp.Application.Workbooks.Add(true);
            string timeMark = DateTime.Now.ToString("yyyyMMddHHmmss");
            string FilePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "geovindu" + timeMark + ".xlsx");
            //Create an Excel workbook instance and open it from the predefined location
            //Excel.Workbook excelWorkBook = excelApp.Workbooks.Open(FilePath);
            Excel.Workbooks books = (Excel.Workbooks)excelApp.Workbooks;
            Excel.Workbook excelWorkBook = (Excel.Workbook)books.Add(miss);
            foreach (DataTable table in ds.Tables)
            {
                //Add a new worksheet to workbook with the Datatable name
                Excel.Worksheet excelWorkSheet = excelWorkBook.Sheets.Add();
                excelWorkSheet.Name = table.TableName;

                for (int i = 1; i < table.Columns.Count + 1; i++)
                {
                    excelWorkSheet.Cells[1, i] = table.Columns[i - 1].ColumnName;
                }

                for (int j = 0; j < table.Rows.Count; j++)
                {
                    for (int k = 0; k < table.Columns.Count; k++)
                    {
                        excelWorkSheet.Cells[j + 2, k + 1] = table.Rows[j].ItemArray[k].ToString();
                    }
                }
            }

            excelWorkBook.SaveAs(FilePath, miss, miss, miss, miss, miss, Excel.XlSaveAsAccessMode.xlNoChange, System.Text.Encoding.UTF8, miss, miss);
            excelWorkBook.Close(false, miss, miss);
            //excelWorkBook.Save();
            books.Close();
            excelApp.Quit();

        }