NOPI導出Excel 自定義列名

NOPI 做Excel 導出確實很方便 ，但是一直在用沒好好研究。

在網上沒找到自定義Columns的方法 ，於是乎自己就在原來的方法上簡單地改改。

 想用的童鞋們可以直接拿去用！

        /// 數據大於65536時使用
        /// </summary>
        /// <param name="dt">數據源</param>
        /// <param name="Columns">列名</param>
        /// <returns></returns>
        public static byte[] ExportToExcel_Columns(DataTable dt, ArrayList Columns)
        {
            DataColumnCollection str = dt.Columns;
            if (str.Count == 0) return null;
            HSSFWorkbook hssfworkbook;
            hssfworkbook = new HSSFWorkbook();
            ISheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
            List<NPOI.SS.UserModel.ISheet> sheetList = new List<NPOI.SS.UserModel.ISheet>();
            sheetList.Add(sheet1);

            int rows = dt.Rows.Count + 1;
            int p = rows % 65535 == 0 ? rows / 65535 : (rows / 65535) + 1;
            for (int i = 1; i < p; i++)
            {
                ISheet sheet = hssfworkbook.CreateSheet("sheet" + (i + 1).ToString());
                sheetList.Add(sheet);
            }
            LargeDataExport_Columns(hssfworkbook, sheetList, dt, Columns);
            MemoryStream file = new MemoryStream();
            hssfworkbook.Write(file);
            file.Close();
            return file.ToArray();
        }

        private static void LargeDataExport_Columns(NPOI.HSSF.UserModel.HSSFWorkbook hssfworkbook, List<NPOI.SS.UserModel.ISheet> sheetCollection, DataTable dt, ArrayList Columns)
        {
            // DataColumnCollection str = dt.Columns; //定義表頭，原來是從datatable中獲取的columns

            for (int i = 0; i < sheetCollection.Count; i++)
            {
                ISheet sheet1 = sheetCollection[i];

                if (i == 0)
                {
                    IRow headerRow = sheet1.CreateRow(0);
                    for (int m = 0, len = Columns.Count; m < len; m++)
                    {
                        ICell curCell = headerRow.CreateCell(m);
                        headerRow.Height = 150 * 3;
                        ICellStyle style = hssfworkbook.CreateCellStyle();
                        style.FillPattern = FillPattern.SolidForeground;  
                        style.FillForegroundColor = HSSFColor.Grey25Percent.LightOrange.Index;
                        IFont font = hssfworkbook.CreateFont();
                        font.FontHeightInPoints = 10;
                        font.Color = HSSFColor.White.Index; //HSSFColor.WHITE.index;
                        style.SetFont(font);
                        curCell.CellStyle = style;
                        curCell.SetCellValue(Columns[m].ToString());
                        sheet1.SetColumnWidth(m, 400 * 10);
                    }
                }

                for (int j = i * 65535; j < (i + 1) * 65535; j++)
                {
                    if (j > dt.Rows.Count - 1)
                        break;
                    IRow row = sheet1.CreateRow(j - 65535 * i + 1);
                    row.Height = 120 * 3;

                    for (int k = 0; k < dt.Columns.Count; k++)
                    {
                        ICell rowCell = row.CreateCell(k);
                        rowCell.SetCellValue(dt.Rows[j][k].ToString());
                    }
                }
            }
        }

 程序調用：

        /// <summary>
        ///xxxx數據導出
        /// </summary>
        /// <param name="flg"></param>
        /// <returns></returns>
        public FileResult ExportExcel_ProfitDetails()
        {
            DataSet ds = new DataSet();
            //獲取當前操作用戶
            string userRealName = "";
            if (!string.IsNullOrEmpty(Session["user"].ToString()))
            {
                userRealName = Session["user"].ToString();
            }

            tempLog.Info(string.Format("用戶：{0}正在做xxxx數據導出操作", userRealName));
            string date = Request["datetime"].ToString();
            ds = Automation.Common.DbHelperSQL.Query("ColligateExport");
            //創建Excel文件的對象
            NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            NPOIExcelHelper n = new NPOIExcelHelper();
            byte[] fileArr = null;
            try
            {
                string[] a = new string[] { "ID", "應支付金額", "應支付日期", "支付期數","支付狀態","公司收入","公司支出"
                  ,"支付類型","工單ID","收益明細ID", "轉讓債權價值","還款金額","還款日期","實際支付金額","實際本金","實際利息"};
                ArrayList alist = new ArrayList();
                alist.AddRange(a);
                fileArr =  NPOIExcelHelper.ExportToExcel_Columns(ds.Tables[0],alist);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            string fileName = "xxxx數據" + System.DateTime.Now.ToString("yyyyMMddhhssmm");
            tempLog.Info(string.Format("導出xxxx數據的Excel文件名為：{0}", fileName));
            return File(fileArr, "application/vnd.ms-excel", fileName + ".xls");
        }

 

最后：使用時記得加上NOPI 引用哦！

轉載請注明出處：http://www.cnblogs.com/apeng/p/5579834.html