运用NPOI操作EXCEL

一、引入NPOI程序集

下载地址：http://pan.baidu.com/s/1qWI3Vgo

二、运用NPOI导出成excel文件

  protected void btnOutExcel_Click(object sender, EventArgs e)
         {
             HSSFWorkbook workbook = new HSSFWorkbook();//创建一个工作薄
             ISheet sheet1 = workbook.CreateSheet("学员信息页");//创建一个sheet页
             IRow rowHeader = sheet1.CreateRow();//创建第一行
             //设置表头内容
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("ID");//创建第一行第一列的单元格，设定里面的值为ID
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("姓名");
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("用户名");
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("手机号");
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("班级");
             rowHeader.CreateCell(, CellType.STRING).SetCellValue("创建时间");
             //设置数据内容
             OpenDB();
             string strSql = "select UserId,RealName,UserName,PhoneNum,Phase,CreatedTime from UserInfor";
             using (cmd = new SqlCommand(strSql, con))
             {
                 using (read = cmd.ExecuteReader())
                 {
                     int i = ;
                     while (read.Read())
                     {
                         i++;
                         IRow rowData = sheet1.CreateRow(i);
                         rowData.CreateCell(, CellType.STRING).SetCellValue(read["UserId"].ToString());//创建第一行第一列的单元格，设定里面的值为ID
                         rowData.CreateCell(, CellType.STRING).SetCellValue(read["RealName"].ToString());
                         rowData.CreateCell(, CellType.STRING).SetCellValue(read["UserName"].ToString());
                         rowData.CreateCell(, CellType.STRING).SetCellValue(read["PhoneNum"].ToString());
                         rowData.CreateCell(, CellType.STRING).SetCellValue(read["Phase"].ToString());

                         ICellStyle styledate = workbook.CreateCellStyle();
                         IDataFormat format = workbook.CreateDataFormat();
                         styledate.DataFormat = format.GetFormat("yyyy\"年\"m\"月\"d\"日\"");
                         ICell cellInDate = rowData.CreateCell(, CellType.NUMERIC);
                         cellInDate.CellStyle = styledate;
                         cellInDate.SetCellValue(read["CreatedTime"].ToString());
                     }
                     using (Stream stream = File.OpenWrite("e:/1.xls"))
                     {
                         workbook.Write(stream);
                     }
                 }
             }
         }

三、从excel文件里面导出数据

 protected void btnFromExcel_Click(object sender, EventArgs e)
         {
             StringBuilder sb = new StringBuilder();
             sb.Append("<table>");
             sb.Append("<tr><th>ID</th><th>姓名</th><th>用户名</th><th>手机号</th><th>班级</th><th>创建时间</th></tr>");
             using (Stream stream = File.OpenRead("e:/1.xls"))
             {
                 HSSFWorkbook workbook = new HSSFWorkbook(stream);
                 int j = workbook.GetSheetAt().LastRowNum;
                 for (int row = ; row <= j; row++)
                 {
                     sb.Append("<tr>");
                     sb.Append(string.Format("<td>{0}</td><td>{1}</td><td>{2}</td><td>{3}</td><td>{4}</td><td>{5}</td>", workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue, workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue, workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue, workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue, workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue, workbook.GetSheetAt().GetRow(row).GetCell().StringCellValue));
                     sb.Append("</tr>");
                 }
             }
             sb.Append("<table>");
             Response.Write(sb.ToString());
         }

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