oz

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前阵子工作需要,将数据库数据导出到Excel。试了很多方法包括excelpackage(见上一篇),最后还是感觉NPOI比较好用一些。事实证明NPOI使用很简洁,在.net项目中只需引入一个NPOI.dll文件即可。

官网下载地址:http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=npoi&DownloadId=764162&FileTime=130334008104200000&Build=20885

(是不是很简洁)

 

然后就是代码了,这里我导出的是一个标准Excel格式。对于同学们算是一个入门级教程,同学们若想了解更多NPOI 可以自己慢慢研究~ 另外,我这里导出需要提供一个Excel模板,放到指定的目录中。

对于NPOI不支持Excel2007的问题(我本机是Excel2007),我的解决办法是:放了一个Excel2003的Excel模板。

下面附上我的导出方法代码:

 

  1 string tempPath = "";
  2             //设置Excel模板的存放路径
  3             tempPath = Server.MapPath("~/xls_files/Template_DeviceIP.xls");
  4             if (tempPath.Length > 0)
  5             {
  6                 string sql = "select ip,ipUser,state,dept from ip_info ";
  7                 //  string sql1 = "select orderId,range,comm_soc_orgname,distinguish,classes,createtime,competent_name,prin_name,phonenumber,numbercount,isParty from st_comm_soc_org order by orderId";
  8                 // DataTable dtcomm = DbHelperSQL.Query(sql1).Tables[0];
  9                 DataTable dtsoc = DbHelperSQL.Query(sql).Tables[0];
 10                 if (dtsoc != null && dtsoc.Rows.Count > 0)
 11                 {
 12 
 13                     FileStream file = new FileStream(tempPath, FileMode.Open, FileAccess.Read);//读入excel模板
 14                     IWorkbook workbook = new HSSFWorkbook(file);
 15                     //设置Excel的样式,这里设置了表格的边框和高度
 16                     ICellStyle datastyle = workbook.CreateCellStyle();
 17                     datastyle.Alignment = HorizontalAlignment.Center;
 18                     datastyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
 19                     datastyle.TopBorderColor = HSSFColor.Black.Index;
 20                     datastyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
 21                     datastyle.RightBorderColor = HSSFColor.Black.Index;
 22                     datastyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
 23                     datastyle.BottomBorderColor = HSSFColor.Black.Index;
 24                     datastyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
 25                     datastyle.LeftBorderColor = HSSFColor.Black.Index;
 26                     IFont datafont = workbook.CreateFont();
 27                     datafont.FontHeightInPoints = 10;//字号
 28                     datastyle.SetFont(datafont);
 29 
 30 
 31                     string bakPath = "IP表.xls";
 32                     int totalIndex = dtsoc.Rows.Count;
 33                     int rowIndex = 3;       // 起始行
 34                     int dtRowIndex = dtsoc.Rows.Count;       // DataTable的数据行数
 35 
 36                     ISheet sheet = workbook.GetSheet("IP表");
 37                     foreach (DataRow row in dtsoc.Rows)
 38                     {
 39                         #region 填充内容
 40                         //HSSFRow dataRow = sheet.GetRow(rowIndex);
 41                         IRow dataRow = sheet.CreateRow(rowIndex);
 42                         int columnIndex = 0;        // 开始列(0为标题列,从1开始)
 43                         foreach (DataColumn column in dtsoc.Columns)
 44                         {
 45                             // 列序号赋值
 46                             if (columnIndex >= dtsoc.Columns.Count)
 47                                 break;
 48 
 49                             //HSSFCell newCell = dataRow.GetCell(columnIndex);
 50                             //if (newCell == null)
 51                             ICell newCell = dataRow.CreateCell(columnIndex);
 52                             string drValue = row[column].ToString();
 53 
 54 
 55                             switch (column.DataType.ToString())
 56                             {
 57                                 case "System.String"://字符串类型
 58                                     newCell.SetCellValue(drValue);
 59                                     newCell.CellStyle = datastyle;
 60                                     break;
 61                                 case "System.DateTime"://日期类型
 62                                     DateTime dateV;
 63                                     DateTime.TryParse(drValue, out dateV);
 64                                     newCell.SetCellValue(dateV);
 65                                     newCell.CellStyle = datastyle;
 66                                     break;
 67                                 case "System.Boolean"://布尔型
 68                                     bool boolV = false;
 69                                     bool.TryParse(drValue, out boolV);
 70                                     newCell.SetCellValue(boolV);
 71                                     newCell.CellStyle = datastyle;
 72                                     break;
 73                                 case "System.Int16"://整型
 74                                 case "System.Int32":
 75                                 case "System.Int64":
 76                                 case "System.Byte":
 77                                     int intV = 0;
 78                                     int.TryParse(drValue, out intV);
 79                                     newCell.SetCellValue(intV);
 80                                     newCell.CellStyle = datastyle;
 81                                     break;
 82                                 case "System.Decimal"://浮点型
 83                                 case "System.Double":
 84                                     double doubV = 0;
 85                                     double.TryParse(drValue, out doubV);
 86                                     newCell.SetCellValue(doubV);
 87                                     newCell.CellStyle = datastyle;
 88                                     break;
 89                                 case "System.DBNull"://空值处理
 90                                     newCell.SetCellValue("");
 91                                     newCell.CellStyle = datastyle;
 92                                     break;
 93                                 default:
 94                                     newCell.SetCellValue("");
 95                                     newCell.CellStyle = datastyle;
 96                                     break;
 97                             }
 98                             columnIndex++;
 99                         }
100                         #endregion
101 
102                         rowIndex++;
103                     }
104                     using (MemoryStream ms = new MemoryStream())
105                     {
106                         workbook.Write(ms);
107                         ms.Flush();
108                         ms.Position = 0;
109                         sheet = null;
110                         workbook = null;
111 
112 
113                         //sheet.Dispose();
114                         //workbook.Dispose();//一般只用写这一个就OK了,他会遍历并释放所有资源,但当前版本有问题所以只释放sheet
115                         byte[] data = ms.ToArray();
116                         //fs.Write(data, 0, data.Length);
117 
118                         #region 客户端保存
119                         HttpResponse response = System.Web.HttpContext.Current.Response;
120                         response.Clear();
121                         //Encoding pageEncode = Encoding.GetEncoding(PageEncode);
122                         response.Charset = "UTF-8";
123                         response.ContentType = "application/vnd-excel";//"application/vnd.ms-excel";
124                         System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition"string.Format("attachment; filename=" + bakPath));
125                         System.Web.HttpContext.Current.Response.BinaryWrite(data);
126                     }
127 
128                 }
129                 else
130                 {
131                     Page.ClientScript.RegisterStartupScript(this.GetType(), "ClientScript""alert('无数据导出!');"true);
132                     return;
133                 }
134             }
View Code

 

导出成功!而且速度很快 

 

 

posted on 2014-03-19 21:18  oz  阅读(383)  评论(0编辑  收藏  举报