前台table里的值通过npoi导出excle

前台获取table里的所有值：                                                                        

 

 var tableInfo = "";
         var tableObj = document.getElementById("dg1");
         for (var i = 0; i < tableObj.rows.length; i++) {    //遍历Table的所有Row
             for (var j = 0; j < tableObj.rows[i].cells.length; j++) {   //遍历Row中的每一列

                 tableInfo += tableObj.rows[i].cells[j].innerHTML;
                 //获取Table中单元格的内容
                 if (j != tableObj.rows[i].cells.length - 1) {
                     tableInfo += ",";
                 }

             }
             if (i != tableObj.rows.length - 1) {
                 tableInfo += "|";
             }
         }

这里数据组合成一个字符串  tr用'|'分割  td用','分割    如： 姓名,性别,年龄|qq,男,26|qqq,女,22

后台将数据导入Excle并导出：                                                                      

这里我引用npoi的1.2正式版 资料学习：http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html  最新是2.0的  不过实现简单功能足够了

这里首先添加引用dll文件

using NPOI.HSSF.UserModel;
using NPOI.HPSF;
using NPOI.POIFS.FileSystem;
using NPOI.HSSF.Util;

 生成说明代码：

 protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                string perinfo = this.perinfo.Value.ToString();//接受前台table 数值字符串
                int pernum = Convert.ToInt32(this.pernum.Value);//接受前台值  获得行数 也可通过perinfo获得
                string[] perinfors = perinfo.Split('|');

                InitializeWorkbook();//步骤

                HSSFSheet sheet1 = hssfworkbook.CreateSheet("Sheet1");//创建一个单元  excle默认是三个

                sheet1.AddMergedRegion(new Region(0, 0, 0, 17));//设置合并单元格   合并第一行 1-18列 空的 可以加标题
                //设置字体样式
                //HSSFCellStyle style = hssfworkbook.CreateCellStyle();
                //style.Alignment = HSSFCellStyle.ALIGN_CENTER;
                //HSSFFont font = hssfworkbook.CreateFont();
                //font.FontHeight = 20 * 20;
                //style.SetFont(font);
                for (int i = 1; i < (pernum + 1); i++)//将table的tr 分别加入到单元格中 这里没有详细判断GetRow 是否为空  不判断容易出错
                {
                    string[] perinfo2 = perinfors[i - 1].Split(',');
                    HSSFRow row = sheet1.CreateRow(i);
                    for (int j = 0; j < 18; j++)
                    {
                        row.CreateCell(j).SetCellValue(perinfo2[j]);

                    }
                }
                //if (sheet1.GetRow(0) != null)
                //{
                //    HSSFCell cell = sheet1.GetRow(0).GetCell(0);
                //    cell.CellStyle = style;
                //}

                WriteToFile();//步骤3
                wr(ppath);//导出   这里只提供一种下载方式
            }
            catch (Exception ex)
            {
                Response.Write("<script>alert('导出失败！');</script>");
            }
        }
        static HSSFWorkbook hssfworkbook;
        public string ppath;
        public void WriteToFile()
        {
            //Write the stream data of workbook to the root directory
            string year = DateTime.Now.Year.ToString();
            ppath = HttpContext.Current.Server.MapPath("downxls/" + year + "年招聘新员工所需信息.xls");
            FileStream file = new FileStream(ppath, FileMode.Create);
            hssfworkbook.Write(file);
            file.Close();
           
        }
        public void InitializeWorkbook()
        {
            hssfworkbook = new HSSFWorkbook();
            ////create a entry of DocumentSummaryInformation
            DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
            dsi.Company = "company";
            hssfworkbook.DocumentSummaryInformation = dsi;
            ////create a entry of SummaryInformation
            SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            si.Subject = "xxx";
            hssfworkbook.SummaryInformation = si;
        }
        public void wr(string ppath)
        {
            if (File.Exists(ppath))
            {
                Response.ClearHeaders();
                Response.Clear();
                Response.Expires = 0;
                Response.Buffer = true;
                Response.AddHeader("Accept-Language", "zh-tw");
                string name = System.IO.Path.GetFileName(ppath);
                System.IO.FileStream files = new FileStream(ppath, FileMode.Open, FileAccess.Read, FileShare.Read);
                byte[] byteFile = null;
                if (files.Length == 0)
                {
                    byteFile = new byte[1];
                }
                else
                {
                    byteFile = new byte[files.Length];
                }
                files.Read(byteFile, 0, (int)byteFile.Length);
                files.Close();

                Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(name, System.Text.Encoding.UTF8));
                Response.ContentType = "application/octet-stream;charset=gbk";
                Response.BinaryWrite(byteFile);
                Response.End();


            }
        }

生成excle效果图：

简单例子 仅供参考