【C#】.net 导出Excel功能
将DataSet对象导出成Excel文档
一、不带格式控制
void btnExport_Click(object sender, EventArgs e) { IList<string> fields = new List<string>(); IList<string> headers = new List<string>(); fields.Add("数据库字段名1"); headers.Add("Excel字段名1"); fields.Add("数据库字段名2"); headers.Add("Excel字段名2"); StringBuilder strFlag = new StringBuilder(); foreach (string head in headers) { strFlag.Append(head + ","); if (head == headers[headers.Count - 1]) { strFlag = strFlag.Remove(strFlag.Length - 1, 1); strFlag.Append("\r\n"); } } DataSet dt = new DataSet();//从数据库获取到数据 if (dt != null && dt.Tables[0].Rows.Count > 0) { foreach (DataRow row in dt.Tables[0].Rows) { foreach (string field in fields) { strFlag.Append(row[field]).Append(","); if (field == fields[headers.Count - 1]) { strFlag = strFlag.Remove(strFlag.Length - 1, 1); strFlag.Append("\r\n"); } } } Page.Response.Clear(); Page.Response.Buffer = false; Page.Response.Charset = "GB2312"; Page.Response.AppendHeader("Content-Disposition", "attachment;filename=Excel文件名.csv"); Page.Response.ContentType = "application/octet-stream"; Page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); Page.EnableViewState = false; Page.Response.Write(strFlag.ToString()); Page.Response.End(); } }
二、可控制导出格式(是目前.net导出excel最适合的解决方案)
//引用NPOI.dll //using NPOI.HSSF.UserModel; //using NPOI.HPSF; //using NPOI.POIFS.FileSystem; //using NPOI.SS.UserModel; DataSet dt = new DataSet();//从数据库读取数据; HSSFWorkbook workbook = new HSSFWorkbook(); ISheet sheet1 = workbook.CreateSheet("Sheet1"); workbook.CreateSheet("Sheet2"); workbook.CreateSheet("Sheet3");//一般Excel都有三个Sheet HSSFRow row = (HSSFRow)sheet1.CreateRow(0); row.CreateCell(0).SetCellValue("姓名"); row.CreateCell(1).SetCellValue("性别"); row.CreateCell(2).SetCellValue("年龄"); //样式,更多样式见文档 ICellStyle cellStyle_cny = workbook.CreateCellStyle(); IDataFormat format = workbook.CreateDataFormat(); //cellStyle_cny.DataFormat = format.GetFormat("¥#,##0.00;¥-#,##0.00");//价格样式 cellStyle_cny.Alignment = HorizontalAlignment.Center;//左右居中 cellStyle_cny.VerticalAlignment = VerticalAlignment.Center;//上下居中 if (dt != null && dt.Tables[0].Rows.Count > 0) { for (int i = 0; i < dt.Tables[0].Rows.Count; i++) { row = (HSSFRow)sheet1.CreateRow(i + 1); row.CreateCell(0).SetCellValue(dt.Tables[0].Rows[i]["Name"].ToString()); row.CreateCell(1).SetCellValue(dt.Tables[0].Rows[i]["Sex"].ToString()); row.CreateCell(2).SetCellValue(Convert.ToInt32(dt.Tables[0].Rows[i]["Age"])); row.GetCell(2).CellStyle = cellStyle_cny;//设置样式 } } //sheet1.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(1,4,2,2)); //合并单元格,将第3列的第二行到第五行合并为一个单元格(下标从0开始) //导出 System.IO.MemoryStream ms = new System.IO.MemoryStream(); workbook.Write(ms); Page.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=我的消费记录{0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssfff"))); Page.Response.BinaryWrite(ms.ToArray()); workbook = null; ms.Close(); ms.Dispose();
注:
1、NPOI.dll可到官网下载,或网上搜索下载。官网:http://npoi.codeplex.com/
2、关于NPOI是什么,以及相关文档,请浏览:http://blog.csdn.net/pan_junbiao/article/details/39717443
3、导出文件名如果是中文的话会出现乱码的解决方法:
//将中文名转码之后再加入文件头 string filename = HttpUtility.UrlEncode(System.Text.UTF8Encoding.UTF8.GetBytes("文件名.xls")); Page.Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
补充第二点,设置所导出的文档的详细信息,就是右击文件--属性--详细信息,所看到的信息
//代码为第二点的代码补充(一些变量在第二点中声明) DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation(); dsi.Company = "xx公司"; SummaryInformation si = PropertySetFactory.CreateSummaryInformation(); si.Title = "说明标题1"; si.Subject = "主题1"; si.Comments = "备注1"; workbook.DocumentSummaryInformation = dsi; workbook.SummaryInformation = si;