NPOI动态获取数据源绑定Gridview显示

  ///

        /// 绑定数据
        ///

        protected void BindExcelData()
        {

            //先上传 再打开

            HSSFWorkbook workbook = new HSSFWorkbook(this.fupFile.FileContent);

            HSSFSheet sheet = workbook.GetSheetAt(0);

            DataTable table = new DataTable();

            HSSFRow headerRow = sheet.GetRow(0);

            int cellCount = headerRow.LastCellNum;

            //一定要对单元格类型作判断 否则会报错 cannot get a string value from a numeric cell
            for (int i = headerRow.FirstCellNum; i < cellCount; i++)
            {
                if (headerRow.GetCell(i) == null || headerRow.GetCell(i).StringCellValue.Trim() == "")
                {
                    // 如果遇到第一个空列，则不再继续向后读取            
                    cellCount = i + 1;
                    break;
                }
                DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);

                table.Columns.Add(column);
            }


            int rowCount = sheet.LastRowNum;

            for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
            {
                HSSFRow row = sheet.GetRow(i);
                if (row == null || row.GetCell(0) == null || row.GetCell(0).ToString().Trim() == "")
                {
                    // 如果遇到第一个空行，则不再继续向后读取                
                    break;
                }
                DataRow dataRow = table.NewRow();
                for (int j = row.FirstCellNum; j < cellCount - 1; j++)
                {
                    if (row.GetCell(j) != null)
                    {
                        dataRow[j] = row.GetCell(j).ToString();
                    }
                }
                table.Rows.Add(dataRow);
            }


            //workbook = null;
            //sheet = null;

            this.gdvList.DataSource = table;

            this.gdvList.AutoGenerateColumns = true;

            this.gdvList.DataBind();

            gdvList.DataKeyNames = new string[] { "IMEI" };

            this.gdvList.PageSize = 20000;

            lblCount.Text = gdvList.Rows.Count.ToString();
        }

       public static string ConvertDate(string date)
        {
        
            string[] orginDate = date.Trim().Split('-');

            string year = orginDate[2].ToString().Trim();

            string day = orginDate[1].ToString().Trim();

            string month = orginDate[0].ToString().Trim();

            if (day.Length == 1)
            {
                day = "0" + day.ToString();
            }

            if (month.Length == 1)
            {
                month = "0" + month.ToString().Trim();
            }

            if (year.Length == 2)
            {
                year = "20" + year.ToString().Trim();
            }


            return year + "-" + month + "-" + day;

        }