NPOI vs EPPlus 导出Excel简单对比

1.引用NPOI.dll和EPPlus.dll

http://epplus.codeplex.com/ 

http://npoi.codeplex.com/   ---- 首先应去下载需要引用的dll并引用进项目

2.EPPlus的导出实验

/// <summary>
        /// EPPlus V4.1 for .NET3.5 24.8万行数据，总用时14秒,EXCEL共6.24MB
        /// </summary>
        protected void ToExcel_epp(DataTable dt)
        {
            using (ExcelPackage package = new ExcelPackage())
            {
                var worksheet = package.Workbook.Worksheets.Add("sheet1");   //创建sheet
                //worksheet.Cells[1, 1, 3, 6].Merge = true;        //合并单元格 worksheet.Cells[int fromRow, fromCol, int toRow,int toCol]
                //worksheet.Cells["A1"].Value = "LOUV数据汇总";  //标题
                worksheet.Cells.Style.Font.Name = "华文细黑";  //字体设置
                worksheet.Cells.Style.Font.Size = 12;
                worksheet.Column(0).Style.Font.Name = "微软雅黑"; //根据列设置样式
                worksheet.Cells.Style.Border.Left.Style = ExcelBorderStyle.Thin;  //边框样式
                worksheet.Cells.Style.Border.Right.Style = ExcelBorderStyle.Thin;
                worksheet.Cells.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
                worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
                worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;  //水平对齐方式
                worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Bottom;  //垂直对齐方式
                //worksheet.Cells.Style.Fill.BackgroundColor.SetColor(Color.DarkGray);  //背景色
                //worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.LightUp;
                //worksheet.Cells.Style.WrapText = true;  //折行显示
                worksheet.Cells.Style.ShrinkToFit = true;  //单元格自适应大小

                //写入data
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    worksheet.Cells[i + 3, 1].Value = dt.Rows[i]["VouID"];
                    worksheet.Cells[i + 3, 2].Value = dt.Rows[i]["SampleName"];
                    worksheet.Cells[i + 3, 3].Value = dt.Rows[i]["Mat"];
                    worksheet.Cells[i + 3, 4].Value = dt.Rows[i]["LINE"];
                    worksheet.Cells[i + 3, 5].Value = dt.Rows[i]["UserID"];
                    worksheet.Cells[i + 3, 6].Value = dt.Rows[i]["Grade"];
                }

                //Write it back to the client
                var data = package.GetAsByteArray();
                Response.Clear();
                Response.AddHeader("content-disposition", "attachment; filename=Lvou.xlsx");
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                Response.BinaryWrite(data);
                Response.Flush();
                Response.End();
            }
        }
           

3.NPOI的导出实验

/// <summary>
        /// NPOI V2.0 for .NET3.5 24.8万行数据，总用时13秒，EXCEL共32MB
        /// </summary>
        protected void ToExcel_npoi(DataTable dt)
        {
            HSSFWorkbook workbook = new HSSFWorkbook();
            ISheet sheet = workbook.CreateSheet();//创建sheet
            //ISheet sheet = workbook.GetSheet("sheet1"); //获取到有名字的sheet
            //ISheet sheet = workbook.GetSheetAt(0);//获取索引处的sheet
            //workbook.SetSheetName(0, "Lvou表"); //设置索引为0的sheet的名字

            #region 右击文件 属性信息
            {
                DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
                dsi.Company = "NPOI";
                workbook.DocumentSummaryInformation = dsi;

                SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
                si.Author = "文件作者信息"; //填加xls文件作者信息
                si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
                si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
                si.Comments = "作者信息"; //填加xls文件作者信息
                si.Title = "标题信息"; //填加xls文件标题信息
                si.Subject = "主题信息";//填加文件主题信息
                si.CreateDateTime = DateTime.Now;
                workbook.SummaryInformation = si;
            }
            #endregion

            ICellStyle cellstyle = workbook.CreateCellStyle(); //样式
            //IDataFormat format = workbook.CreateDataFormat();
            //cellstyle.DataFormat = format.GetFormat("yyyy-mm-dd");
            sheet.SetColumnWidth(0,5000); //设置列宽
            sheet.SetColumnWidth(1,3000);
            IFont font = workbook.CreateFont();
            font.FontName = "微软雅黑";
            //font.Boldweight = 700;
            cellstyle.SetFont(font);

            #region 列头及样式
            //{
            //    HSSFRow headerRow = sheet.CreateRow(1);
            //    HSSFCellStyle headStyle = workbook.CreateCellStyle();
            //    headStyle.Alignment = NPOI.HSSF.UserModel.HSSFCellStyle.ALIGN_CENTER;
            //    HSSFFont font = workbook.CreateFont();
            //    font.FontHeightInPoints = 10;
            //    font.Boldweight = 700;
            //    headStyle.SetFont(font);
            //    foreach (DataColumn column in dtSource.Columns)
            //    {
            //        headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
            //        headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

            //        //设置列宽
            //        sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
            //    }
            //    // headerRow.Dispose();
            //}
            #endregion

            #region 取得列宽
            //int[] arrColWidth = new int[dt.Columns.Count];
            //foreach (DataColumn item in dt.Columns)
            //{
            //    arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            //}
            //for (int i = 0; i < dt.Rows.Count; i++)
            //{
            //    for (int j = 0; j < dt.Columns.Count; j++)
            //    {
            //        int intTemp = Encoding.GetEncoding(936).GetBytes(dt.Rows[i][j].ToString()).Length;
            //        if (intTemp > arrColWidth[j])
            //        {
            //            arrColWidth[j] = intTemp;
            //        }
            //    }
            //}
            #endregion

            //写入数据
            int k = 1;
            int q = 1;
            foreach (DataRow dr in dt.Rows)
            {
                if (k == 60000)
                {
                    sheet = workbook.CreateSheet("sheet" + q);
                    k = 1;
                    q++;
                }
                IRow row = sheet.CreateRow(k+2);
                
                row.CreateCell(0).SetCellValue(dr["VouID"].ToString());
                row.GetCell(0).CellStyle = cellstyle;
                row.CreateCell(1).SetCellValue(dr["SampleName"].ToString());
                row.GetCell(1).CellStyle = cellstyle;
                row.CreateCell(2).SetCellValue(dr["Mat"].ToString());
                row.GetCell(2).CellStyle = cellstyle;
                row.CreateCell(3).SetCellValue(dr["LINE"].ToString());
                row.GetCell(3).CellStyle = cellstyle;
                row.CreateCell(4).SetCellValue(dr["UserID"].ToString());
                row.GetCell(4).CellStyle = cellstyle;
                row.CreateCell(5).SetCellValue(dr["Grade"].ToString());
                row.GetCell(5).CellStyle = cellstyle;
                k++;
            }

            HttpContext curContext = HttpContext.Current;
            // 设置编码和附件格式
            curContext.Response.ContentType = "application/vnd.ms-excel";
            curContext.Response.ContentEncoding = Encoding.UTF8;
            curContext.Response.Charset = "";
            curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("Lvou.xls", Encoding.UTF8));
            Response.BinaryWrite(WriteToStream(workbook).GetBuffer());
            Response.End();
        }
        
        /// 导出到文件流
        /// <summary>
        /// 导出到文件流
        /// </summary>
        /// <param name="hssfworkbook"></param>
        /// <returns></returns>
        private MemoryStream WriteToStream(HSSFWorkbook hssfWorkbook)
        {
            MemoryStream file = new MemoryStream();
            hssfWorkbook.Write(file);
            return file;
        }
           

4.结论

速度：相差不大（EPPlus：14s NPOI：13s） 导出文件大小：EPPlus完胜（EPPlus：6.24MB NPOI：32MB） 操作难度：EPPlus感觉上略为人性化一点 其他：NPOI一个sheet最多容纳65536行数据，故数据量大于65536时需要分多个sheet，较为麻烦，EPPlus暂时没有发现这个问题