NPIO 导出记录

http://www.cnblogs.com/qingyuan/archive/2012/11/08/2760034.html

http://www.cnblogs.com/gaoshuai/archive/2010/06/08/1753695.html

//内存流，行列

public static MemoryStream RenderToExcel(DataTable table)
        {
            MemoryStream ms = new MemoryStream();

            using (table)
            {
                using (IWorkbook workbook = new HSSFWorkbook())
                {
                    using (ISheet sheet = workbook.CreateSheet())
                    {
                        IRow headerRow = sheet.CreateRow(0);
                        // handling header. 
                        foreach (DataColumn column in table.Columns)
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);//If Caption not set, returns the ColumnName value 
                        // handling value. 
                        int rowIndex = 1;
                        foreach (DataRow row in table.Rows)
                        {
                            IRow dataRow = sheet.CreateRow(rowIndex);
                            foreach (DataColumn column in table.Columns)
                            {
                                dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
                            }
                            rowIndex++;
                        }
                        workbook.Write(ms);
                        ms.Flush();
                        ms.Position = 0;
                    }
                }
            }
            return ms;
        }

//调用输出头设置

            PersonDAL pdal = new PersonDAL();
            DataTable dt = pdal.GetPersonDataTableAll();
            MemoryStream ms = RenderToExcel(dt);
            string fileName = "pdb.xls";
            HttpContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
            HttpContext.Response.BinaryWrite(ms.ToArray());
            HttpContext.Response.End();
            ms.Close();
            ms = null;

 HttpContext.Response.ContentType = "application/vnd.ms-excel";

全面样式帮助：

http://tonyqus.sinaapp.com/tutorial

http://www.cnblogs.com/knowledgesea/archive/2012/11/16/2772547.html