ASP.NET实现上传Excel功能_实用技巧_

 protected void ImpClick(object sender, EventArgs e) { try { #region 校验 var fileName = this.FileUpload1.FileName; if (string.IsNullOrWhiteSpace(fileName)) { //提示信息 ShowMsgHelper.Alert("请选择上传Excel文件"); return; } //获取上传文件扩展名称 if (!(fileName.IndexOf(".xlsx") > 0 || fileName.IndexOf(".xls") > 0)) { ShowMsgHelper.Alert("上传文件格式不正确，请核对！"); return; } #endregion #region 将Excel文件上传到服务器上临时文件夹中 //临时文件夹，根目录下/Upload/tmp/，根据自己配置选择 string path = Server.MapPath("~/") + "Upload\\tmp\\"; string retStr=UploadHelper.FileUpload(path, this.FileUpload1); if (!retStr.Equals("上传成功")) { ShowMsgHelper.Alert(retStr); return; } #endregion #region 读取Excel文件第一个表获取内容并转换成DataTable,删除临时文件，也可以自己加时间戳，维护处理 DataTable dt = this.ExcelToDataTable(path + this.FileUpload1.FileName, true); if (dt == null) { ShowMsgHelper.Alert_Error("获取失败"); return; } //示例：获取dt中的值 string test = dt.Rows[0]["name"].ToString(); string test2 = dt.Rows[1]["class"].ToString(); //删除临时文件 DirFileHelper.DeleteFile("Upload\\tmp\\" + fileName); #endregion } catch (Exception ex) { throw ex; } } /// 
 /// 将excel导入到datatable /// 
 /// excel路径 /// 第一行是否是列名 /// 返回datatable public DataTable ExcelToDataTable(string filePath, bool isColumnName) { DataTable dataTable = null; FileStream fs = null; DataColumn column = null; DataRow dataRow = null; IWorkbook workbook = null; ISheet sheet = null; IRow row = null; ICell cell = null; int startRow = 0; try { using (fs = File.OpenRead(filePath)) { // 2007版本 if (filePath.IndexOf(".xlsx") > 0) workbook = new XSSFWorkbook(fs); // 2003版本 else if (filePath.IndexOf(".xls") > 0) workbook = new HSSFWorkbook(fs); if (workbook != null) { sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet dataTable = new DataTable(); if (sheet != null) { int rowCount = sheet.LastRowNum;//总行数 if (rowCount > 0) { IRow firstRow = sheet.GetRow(0);//第一行 int cellCount = firstRow.LastCellNum;//列数 //构建datatable的列 if (isColumnName) { startRow = 1;//如果第一行是列名，则从第二行开始读取 for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { cell = firstRow.GetCell(i); if (cell != null) { if (cell.StringCellValue != null) { column = new DataColumn(cell.StringCellValue); dataTable.Columns.Add(column); } } } } else { for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { column = new DataColumn("column" + (i + 1)); dataTable.Columns.Add(column); } } //填充行 for (int i = startRow; i <= rowCount; ++i) { row = sheet.GetRow(i); if (row == null) continue; dataRow = dataTable.NewRow(); for (int j = row.FirstCellNum; j < cellCount; ++j) { cell = row.GetCell(j); if (cell == null) { dataRow[j] = ""; } else { //CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,) switch (cell.CellType) { case CellType.Blank: dataRow[j] = ""; break; case CellType.Numeric: short format = cell.CellStyle.DataFormat; //对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理 if (format == 14 || format == 31 || format == 57 || format == 58) dataRow[j] = cell.DateCellValue; else dataRow[j] = cell.NumericCellValue; break; case CellType.String: dataRow[j] = cell.StringCellValue; break; } } } dataTable.Rows.Add(dataRow); } } } } } return dataTable; } catch (Exception) { if (fs != null) { fs.Close(); } return null; } }