.net MVC 数据库数据导出到Excel表格并下载到本地

来源：互联网发布：java内存落差较大编辑：程序博客网时间：2024/06/06 03:52

需要引用组件： NPOI

NPOI.OOXML,

NPOI.OpenXML4Net,

NPOI.OpenXmlFormats

using NPOI.HSSF.UserModel;using NPOI.SS.UserModel;

public FileResult Export()        {            //Excel表格 存储路径             string path = Server.MapPath(string.Format("/Template/{0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssffff")));            //获取要导出的数据            DataTable dt = new BLL.ZK_T_InspectionLedger().GetAllList().Tables[0];            string year = dt.Rows[0]["WorkYear"] == null ? "" : dt.Rows[0]["WorkYear"].ToString();            //删除表中不需要导出的列            dt.Columns.Remove("ID");            dt.Columns.Remove("WorkYear");            dt.Columns.Remove("CreateTime");            //修改列名            dt.Columns["SerialNumber"].ColumnName = "序号";            dt.Columns["KeyWork"].ColumnName = "重点工作";            dt.Columns["ResponsibleLeadership"].ColumnName = "责任领导";            dt.Columns["UndertakePostAndUser"].ColumnName = "承办部门及承办人";            dt.Columns["CompletionTimeLimit"].ColumnName = "完成时限";            dt.Columns["WorkProgress"].ColumnName = "工作进展";            dt.Columns["ExistingProblems"].ColumnName = "存在问题";            dt.Columns["ActualProgress"].ColumnName = "实际进度";            dt.Columns["TimeProgress"].ColumnName = "时间进度";            HSSFWorkbook workbook = new HSSFWorkbook();            ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName);//创建工作表            #region 标题            IRow row = sheet.CreateRow(0);//在工作表中添加一行            for (int i = 0; i < dt.Columns.Count; i++)            {                ICell cell = row.CreateCell(i);//在行中添加一列                sheet.SetColumnWidth(i, 10 * 512);                cell.SetCellValue(dt.Columns[i].ColumnName);//设置列的内容             }            #endregion            #region 填充数据            for (int i = 1; i <= dt.Rows.Count; i++)//遍历DataTable行            {                DataRow dataRow = dt.Rows[i - 1];                row = sheet.CreateRow(i);//在工作表中添加一行                for (int j = 0; j < dt.Columns.Count; j++)//遍历DataTable列                {                    ICell cell = row.CreateCell(j);//在行中添加一列                    cell.SetCellValue(dataRow[j].ToString());//设置列的内容                 }            }            #endregion            #region 输出到Excel            MemoryStream ms = new MemoryStream();            workbook.Write(ms);            using (FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write))            {                byte[] bArr = ms.ToArray();                fs.Write(bArr, 0, bArr.Length);                fs.Flush();            }            #endregion            return File(path, "application/octet-stream", string.Format("{0}年新媒体产业基地{1}项重点工作.xls",year, dt.Rows.Count));        }

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