using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using NPOI.HSSF.UserModel;
using good.DAl;
using System.Data;namespace good
{/// <summary>/// excel 的摘要说明/// </summary>public class excel : IHttpHandler{Sql sql = new Sql();IDataReader reader;public void ProcessRequest(HttpContext context){context.Response.ContentType = "application/x-excel";  //设置类型string filename = HttpUtility.UrlEncode("动态数据.xls");context.Response.AddHeader("Content-Disposition","attachment;filename=" + filename);reader = sql.GetReader();HSSFWorkbook workbook = new HSSFWorkbook();//新建EXCEL文件HSSFSheet sheet = workbook.CreateSheet();//新建页if (reader!= null ){while (reader.Read()){int i = 0;string userName = reader.GetString(reader.GetOrdinal("Name"));int  id = (int)reader.GetValue(reader.GetOrdinal("ID"));HSSFRow row = sheet.CreateRow(i);  //创建行row.CreateCell(0, HSSFCell.CELL_TYPE_STRING).SetCellValue(userName);//创建cell并给Cell设置数据类型以及数据row.CreateCell(1, HSSFCell.CELL_TYPE_NUMERIC).SetCellValue(id);}workbook.Write(context.Response.OutputStream);//将生成的EXCEL文件流输出到上下文中}else{}//HSSFWorkbook workbook = new HSSFWorkbook();//HSSFSheet sheet = workbook.CreateSheet();//HSSFRow row1 = sheet.CreateRow(0);//HSSFCell cell1 = row1.CreateCell(0, HSSFCell.CELL_TYPE_STRING);//cell1.SetCellValue("你好");}public bool IsReusable{get{return false;}}}
}

 public IDataReader GetReader(){SqlConnection conn = new SqlConnection(strConn);try{conn.Open();string strCmd = "select * from Person";SqlCommand cmd = new SqlCommand(strCmd,conn);IDataReader reader = cmd.ExecuteReader();return reader;}catch (Exception ex){Console.WriteLine(ex.Message);return null;}｝