epplus excel数据导出(数据量有点大的情况) Web和Client

Asp.net MVC后台代码 
 public ActionResult Export()
        {
           
            OfficeOpenXml.ExcelPackage ep = new OfficeOpenXml.ExcelPackage();
            OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;
            OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add("我的工作表");
            ////配置文件属性
            //wb.Properties.Category = "类别";
            //wb.Properties.Author = "作者";
            //wb.Properties.Comments = "备注";
            //wb.Properties.Company = "公司";
            //wb.Properties.Keywords = "关键字";
            //wb.Properties.Manager = "管理者";
            //wb.Properties.Status = "内容状态";
            //wb.Properties.Subject = "主题";
            //wb.Properties.Title = "标题";
            //wb.Properties.LastModifiedBy = "最后一次保存者";
            // var list = GetList();
            int x = 0;
            for (int i = 0; i < 300000; i++)
            {
                //if (x == 1000000)
                //{
                //    ws = wb.Worksheets.Add("我的工作表" + Guid.NewGuid().ToString());
                //    x = 0;

                //}
                for (int j = 1; j <= 9; j++)
                {

                    ws.Cells[(x + 1), j].Value = DateTime.Now.ToString();
                    
                }
                x++;

            }
            //写数据
            //ws.Cells[1, 1].Value = "Hello";

            //ws.Cells[1, 1].Style.Numberformat.Format = "yyyy-MM-dd";

            //ws.Column(1).Width = 40;//修改列宽
            //ws.Cells["B1"].Value = "World";
            //ws.Cells[3, 3, 3, 5].Merge = true;
            //ws.Cells[3, 3].Value = "Cells[3, 3, 3, 5]合并";
            //ws.Cells["A4:D5"].Merge = true;

            //ws.Cells["A4:D5"].Style.HorizontalAlignment = OfficeOpenXml.Style.ExcelHorizontalAlignment.Center;//居中

            //ws.Cells["A4"].Value = "Cells["A4:D5"]合并";
            //写到客户端（下载）
            Response.Clear();
            Response.AddHeader("content-disposition", "attachment;  filename=FileFlow.xlsx");
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            byte[] data=ep.GetAsByteArray();

            Response.AddHeader("Content-Length", data.Length.ToString());
            Response.BinaryWrite(data);
            //ep.SaveAs(Response.OutputStream);    第二种方式
            Response.Flush();
            Response.End();
            return null;

        }

 FileInfo newFile = new FileInfo(@"d:	est.xlsx");
            if (newFile.Exists)
            {
                newFile.Delete();
                newFile = new FileInfo(@"d:	est.xlsx");
            }
            //using (ExcelPackage package = new ExcelPackage(newFile))
            //{
            //    ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("test");
            //    worksheet.Cells[1, 1].Value = "名称";
            //    worksheet.Cells[1, 2].Value = "价格";
            //    worksheet.Cells[1, 3].Value = "销量";

            //    worksheet.Cells[2, 1].Value = "大米";
            //    worksheet.Cells[2, 2].Value = 56;
            //    worksheet.Cells[2, 3].Value = 100;

            //    worksheet.Cells[3, 1].Value = "玉米";
            //    worksheet.Cells[3, 2].Value = 45;
            //    worksheet.Cells[3, 3].Value = 150;

            //    worksheet.Cells[4, 1].Value = "小米";
            //    worksheet.Cells[4, 2].Value = 38;
            //    worksheet.Cells[4, 3].Value = 130;

            //    worksheet.Cells[5, 1].Value = "糯米";
            //    worksheet.Cells[5, 2].Value = 22;
            //    worksheet.Cells[5, 3].Value = 200;

            //    package.Save();
            //}
            OfficeOpenXml.ExcelPackage ep = new OfficeOpenXml.ExcelPackage(newFile);
            OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;
            OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add("我的工作表");
            //配置文件属性
            //wb.Properties.Category = "类别";
            //wb.Properties.Author = "作者";
            //wb.Properties.Comments = "备注";
            //wb.Properties.Company = "公司";
            //wb.Properties.Keywords = "关键字";
            //wb.Properties.Manager = "管理者";
            //wb.Properties.Status = "内容状态";
            //wb.Properties.Subject = "主题";
            //wb.Properties.Title = "标题";
            //wb.Properties.LastModifiedBy = "最后一次保存者";
            // var list = GetList();
            int x = 0;
            for (int i = 0; i < 100; i++)
            {
                if (x == 1000000)
                {
                    ws = wb.Worksheets.Add("我的工作表" + Guid.NewGuid().ToString());
                    x = 0;

                }
                for (int j = 1; j <= 2; j++)
                {

                    ws.Cells[(x + 1), j].Value = DateTime.Now.ToString();
                    Console.WriteLine((i+1));
                }
                x++;

            }
            ep.Save();

Client的版本亲测至少可导出千万级别的数据，Web版本要看服务器内存配置。。

epplus下载路径： http://epplus.codeplex.com/