/// <summary> /// 将datatable导出为excel /// 图片默认显示在excel 第二行最后一列 /// </summary> /// <param name="table">数据源</param> /// <param name="excelInfo">Tuple<excel列名,datatable列名,excel列宽度></param> /// <param name="sheetName">工作簿名称</param> /// <param name="picBytes">导出图片字节流</param> /// <param name="mergedRegion">合并单元格信息：null不合并单元格</param> /// <returns></returns> public static MemoryStream ExportToExcel2007(DataTable table, List<Tuple<string, string, int>> excelInfo, string sheetName, byte[] picBytes, List<CellRangeAddress> mergedRegion) { MemoryStream ms = new MemoryStream(); try { using (table) { IWorkbook workbook = new XSSFWorkbook(); ISheet sheet = workbook.CreateSheet(sheetName); for (int i = 0; i < excelInfo.Count; i++) { sheet.SetColumnWidth(i, excelInfo[i].Item3 * 256); } IRow headerRow = sheet.CreateRow(0); for (int i = 0; i < excelInfo.Count; i++) { headerRow.CreateCell(i).SetCellValue(excelInfo[i].Item1); } int rowIndex = 1; foreach (DataRow row in table.Rows) { IRow dataRow = sheet.CreateRow(rowIndex); for (int i = 0; i < excelInfo.Count; i++) { dataRow.CreateCell(i).SetCellValue(row[excelInfo[i].Item2].ToString()); } rowIndex++; } //合并单元格 if (mergedRegion != null && mergedRegion.Count > 0) { foreach (CellRangeAddress cellRangeAddress in mergedRegion) { //设置一个合并单元格区域，使用上下左右定义CellRangeAddress区域 //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列 sheet.AddMergedRegion(cellRangeAddress); ICellStyle style = workbook.CreateCellStyle(); //设置单元格的样式：水平对齐居中 style.Alignment = HorizontalAlignment.Center; //将新的样式赋给单元格 var cell = sheet.GetRow(cellRangeAddress.FirstRow).GetCell(cellRangeAddress.FirstColumn); cell.CellStyle = style; } } //插入图片 if (picBytes != null && picBytes.Length > 0) { var row1 = 2; var col1 = excelInfo.Count + 1; /* Add Picture to Workbook, Specify picture type as PNG and Get an Index */ int pictureIdx = workbook.AddPicture(picBytes, NPOI.SS.UserModel.PictureType.PNG); //添加图片 /* Create the drawing container */ XSSFDrawing drawing = (XSSFDrawing)sheet.CreateDrawingPatriarch(); /* Create an anchor point */ XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 240, col1, row1, col1 + 1, row1 + 1); /* Invoke createPicture and pass the anchor point and ID */ XSSFPicture picture =(XSSFPicture)drawing.CreatePicture(anchor, pictureIdx); /* Call resize method, which resizes the image */ picture.Resize(); picBytes = null; } workbook.Write(ms); workbook.Close(); } } catch (Exception ex) { ms = null; } return ms; } /// <summary> /// 将datatable导出为excel /// 图片默认显示在excel 第二行最后一列 /// </summary> /// <param name="table">数据源</param> /// <param name="excelInfo">Tuple<excel列名,datatable列名,excel列宽度></param> /// <param name="sheetName">工作簿名称</param> /// <param name="picBytes">导出图片字节流</param> /// <param name="mergedRegion">合并单元格信息：null不合并单元格</param> /// <returns></returns> public static MemoryStream ExportToExcel97(DataTable table, List<Tuple<string, string, int>> excelInfo, string sheetName, byte[] picBytes, List<CellRangeAddress> mergedRegion) { MemoryStream ms = new MemoryStream(); try { using (table) { IWorkbook workbook = new HSSFWorkbook(); ISheet sheet = workbook.CreateSheet(sheetName); for (int i = 0; i < excelInfo.Count; i++) { sheet.SetColumnWidth(i, excelInfo[i].Item3 * 256); } IRow headerRow = sheet.CreateRow(0); for (int i = 0; i < excelInfo.Count; i++) { headerRow.CreateCell(i).SetCellValue(excelInfo[i].Item1); } int rowIndex = 1; foreach (DataRow row in table.Rows) { IRow dataRow = sheet.CreateRow(rowIndex); for (int i = 0; i < excelInfo.Count; i++) { dataRow.CreateCell(i).SetCellValue(row[excelInfo[i].Item2].ToString()); } rowIndex++; } //合并单元格 if (mergedRegion != null && mergedRegion.Count > 0) { foreach (CellRangeAddress cellRangeAddress in mergedRegion) { //设置一个合并单元格区域，使用上下左右定义CellRangeAddress区域 //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列 sheet.AddMergedRegion(cellRangeAddress); ICellStyle style = workbook.CreateCellStyle(); //设置单元格的样式：水平对齐居中 style.Alignment = HorizontalAlignment.Center; //将新的样式赋给单元格 var cell = sheet.GetRow(cellRangeAddress.FirstRow).GetCell(cellRangeAddress.FirstColumn); cell.CellStyle = style; } } //插入图片 if (picBytes != null && picBytes.Length > 0) { var row1 = 2; var col1 = excelInfo.Count + 1; int pictureIdx = workbook.AddPicture(picBytes, NPOI.SS.UserModel.PictureType.PNG); //添加图片 HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch(); HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 240, col1, row1, col1 + 1, row1 + 1); //图片位置，图片左上角为（col, row） HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx); pict.Resize(); //用图片原始大小来显示 picBytes = null; } workbook.Write(ms); ms.Flush(); ms.Position = 0; } } catch (Exception ex) { ms = null; } return ms; }
