NOPI导出Excel 自定义列名

NOPI 做Excel 导出确实很方便 ，但是一直在用没好好研究。

在网上没找到自定义Columns的方法 ，于是乎自己就在原来的方法上简单地改改。

想用的童鞋们可以直接拿去用！

         /// 数据大于65536时使用
         /// </summary>
         /// <param name="dt">数据源</param>
         /// <param name="Columns">列名</param>
         /// <returns></returns>
         public static byte[] ExportToExcel_Columns(DataTable dt, ArrayList Columns)
         {
             DataColumnCollection str = dt.Columns;
             if (str.Count == ) return null;
             HSSFWorkbook hssfworkbook;
             hssfworkbook = new HSSFWorkbook();
             ISheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
             List<NPOI.SS.UserModel.ISheet> sheetList = new List<NPOI.SS.UserModel.ISheet>();
             sheetList.Add(sheet1);

             int rows = dt.Rows.Count + ;
             int p = rows %  ==  ? rows /  : (rows / ) + ;
             for (int i = ; i < p; i++)
             {
                 ISheet sheet = hssfworkbook.CreateSheet("sheet" + (i + ).ToString());
                 sheetList.Add(sheet);
             }
             LargeDataExport_Columns(hssfworkbook, sheetList, dt, Columns);
             MemoryStream file = new MemoryStream();
             hssfworkbook.Write(file);
             file.Close();
             return file.ToArray();
         }

         private static void LargeDataExport_Columns(NPOI.HSSF.UserModel.HSSFWorkbook hssfworkbook, List<NPOI.SS.UserModel.ISheet> sheetCollection, DataTable dt, ArrayList Columns)
         {
             // DataColumnCollection str = dt.Columns; //定义表头，原来是从datatable中获取的columns

             for (int i = ; i < sheetCollection.Count; i++)
             {
                 ISheet sheet1 = sheetCollection[i];

                 if (i == )
                 {
                     IRow headerRow = sheet1.CreateRow();
                     for (int m = , len = Columns.Count; m < len; m++)
                     {
                         ICell curCell = headerRow.CreateCell(m);
                         headerRow.Height =  * ;
                         ICellStyle style = hssfworkbook.CreateCellStyle();
                         style.FillPattern = FillPattern.SolidForeground;
                         style.FillForegroundColor = HSSFColor.Grey25Percent.LightOrange.Index;
                         IFont font = hssfworkbook.CreateFont();
                         font.FontHeightInPoints = ;
                         font.Color = HSSFColor.White.Index; //HSSFColor.WHITE.index;
                         style.SetFont(font);
                         curCell.CellStyle = style;
                         curCell.SetCellValue(Columns[m].ToString());
                         sheet1.SetColumnWidth(m,  * );
                     }
                 }

                 for (int j = i * ; j < (i + ) * ; j++)
                 {
                     if (j > dt.Rows.Count - )
                         break;
                     IRow row = sheet1.CreateRow(j -  * i + );
                     row.Height =  * ;

                     for (int k = ; k < dt.Columns.Count; k++)
                     {
                         ICell rowCell = row.CreateCell(k);
                         rowCell.SetCellValue(dt.Rows[j][k].ToString());
                     }
                 }
             }
         }

 程序调用：

         /// <summary>
         ///xxxx数据导出
         /// </summary>
         /// <param name="flg"></param>
         /// <returns></returns>
         public FileResult ExportExcel_ProfitDetails()
         {
             DataSet ds = new DataSet();
             //获取当前操作用户
             string userRealName = "";
             if (!string.IsNullOrEmpty(Session["user"].ToString()))
             {
                 userRealName = Session["user"].ToString();
             }

             tempLog.Info(string.Format("用户：{0}正在做xxxx数据导出操作", userRealName));
             string date = Request["datetime"].ToString();
             ds = Automation.Common.DbHelperSQL.Query("ColligateExport");
             //创建Excel文件的对象
             NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
             System.IO.MemoryStream ms = new System.IO.MemoryStream();

             NPOIExcelHelper n = new NPOIExcelHelper();
             byte[] fileArr = null;
             try
             {
                 string[] a = new string[] { "ID", "应支付金额", "应支付日期", "支付期数","支付状态","公司收入","公司支出"
                   ,"支付类型","工单ID","收益明细ID", "转让债权价值","还款金额","还款日期","实际支付金额","实际本金","实际利息"};
                 ArrayList alist = new ArrayList();
                 alist.AddRange(a);
                 fileArr =  NPOIExcelHelper.ExportToExcel_Columns(ds.Tables[],alist);
             }
             catch (Exception ex)
             {
                 throw new Exception(ex.Message);
             }
             string fileName = "xxxx数据" + System.DateTime.Now.ToString("yyyyMMddhhssmm");
             tempLog.Info(string.Format("导出xxxx数据的Excel文件名为：{0}", fileName));
             return File(fileArr, "application/vnd.ms-excel", fileName + ".xls");
         }

最后：使用时记得加上NOPI 引用哦！

转载请注明出处：http://www.cnblogs.com/apeng/p/5579834.html