[C#]將數據寫入已存在的excel文件

測試如下（xls/xlsx）：

 

　　     //將數據寫入已存在Excel
        public static void writeExcel(string result, string filepath)
        {
            //1.創建Applicaton對象
            Microsoft.Office.Interop.Excel.Application xApp = new 

            Microsoft.Office.Interop.Excel.Application();

            //2.得到workbook對象，打開已有的文件
            Microsoft.Office.Interop.Excel.Workbook xBook = xApp.Workbooks.Open(filepath,
                                  Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                                  Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                                  Missing.Value, Missing.Value, Missing.Value, Missing.Value);

            //3.指定要操作的Sheet
            Microsoft.Office.Interop.Excel.Worksheet xSheet = (Microsoft.Office.Interop.Excel.Worksheet)xBook.Sheets[1];

            //在第一列的左邊插入一列  1:第一列
            //xlShiftToRight:向右移動單元格   xlShiftDown:向下移動單元格
            //Range Columns = (Range)xSheet.Columns[1, System.Type.Missing];
            //Columns.Insert(XlInsertShiftDirection.xlShiftToRight, Type.Missing);

            //4.向相應對位置寫入相應的數據
            xSheet.Cells[Column(列)][Row(行)] = result;

            //5.保存保存WorkBook
            xBook.Save();
            //6.從內存中關閉Excel對象

            xSheet = null;
            xBook.Close();
            xBook = null;
            //關閉EXCEL的提示框
            xApp.DisplayAlerts = false;          
            //Excel從內存中退出
            xApp.Quit();
            xApp = null;
        }