NPOI导出excel使用
1.在Page_Load或者click下使用ExportExcel方法。
protected void Page_Load(object sender, EventArgs e) { ExportExcel(dt, "成型条件表", "成型条件表");//dt是DataTable类型的数据源,第二个参数设置导出的文件名,第三个参数设置工作簿名 }
2.ExportExcel方法,其中setCellStyle方法看第三条。setCellStyle方法用来设置单元格样式并赋值
public void ExportExcel(DataTable dt, string strFileName, string strSheetName) { HSSFWorkbook book = new HSSFWorkbook();//创建一个新的excel HSSFSheet sheet = book.CreateSheet("Sheet1") as HSSFSheet; //创建sheet页 //第一行 IRow dataRow = sheet.CreateRow(0);//创建一行 0是行号表示第一行 dataRow.HeightInPoints = 20;//设置行高 setCellStyle(book, sheet, dataRow.CreateCell(0), "模号:", 0, 0, 0, 0);//dataRow.CreateCell(0)创建一个单元格,0表示列号表示第一列 setCellStyle(book, sheet, dataRow.CreateCell(1), dt.Rows[0][0].ToString(), 0, 0, 1, 3); setCellStyle(book, sheet, dataRow.CreateCell(4), "图号:", 0, 0, 4, 7); setCellStyle(book, sheet, dataRow.CreateCell(8), dt.Rows[0][1].ToString(), 0, 0, 8, 13); setCellStyle(book, sheet, dataRow.CreateCell(14), "机台:", 0, 0, 14, 17); setCellStyle(book, sheet, dataRow.CreateCell(18), dt.Rows[0][2].ToString(), 0, 0, 18, 25); //设置列宽 for (int i = 0; i < 26; i++) { sheet.SetColumnWidth(i, 5 * 256);//第i列列宽 } //第二行 dataRow = sheet.CreateRow(1); dataRow.HeightInPoints = 20; setCellStyle(book, sheet, dataRow.CreateCell(0), "原料:", 1, 1, 0, 0); setCellStyle(book, sheet, dataRow.CreateCell(1), dt.Rows[0][3].ToString(), 1, 1, 1, 7); setCellStyle(book, sheet, dataRow.CreateCell(8), "色号:", 1, 1, 8, 9); setCellStyle(book, sheet, dataRow.CreateCell(10), dt.Rows[0][4].ToString(), 1, 1, 10, 13); setCellStyle(book, sheet, dataRow.CreateCell(14), "日期:", 1, 1, 14, 16); setCellStyle(book, sheet, dataRow.CreateCell(17), dt.Rows[0][5].ToString(), 1, 1, 17, 20); setCellStyle(book, sheet, dataRow.CreateCell(21), "阶段:", 1, 1, 21, 22); setCellStyle(book, sheet, dataRow.CreateCell(23), dt.Rows[0][6].ToString(), 1, 1, 23, 25); MemoryStream ms = new MemoryStream(); book.Write(ms); Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", HttpUtility.UrlEncode(strFileName, System.Text.Encoding.UTF8))); Response.BinaryWrite(ms.ToArray()); Response.End(); book = null; ms.Close(); ms.Dispose(); }
3.setCellStyle方法
/// <summary> /// 设置单元格样式并赋值 /// </summary> /// <param name="book">Excel操作类</param> /// <param name="sheet">工作表</param> ///<param name="dataCell">单元格</param> /// <param name="value">单元格值</param> /// <param name="startRow">合并单元格起始行</param> /// <param name="stopRow">合并单元格结束行</param> /// <param name="startCol">合并单元格起始列</param> /// <param name="stopCol">合并单元格结束列</param> /// <returns></returns> public void setCellStyle(HSSFWorkbook book, HSSFSheet sheet, ICell dataCell, string value, int startRow, int stopRow, int startCol, int stopCol) { DB db = new DB();//此类中包含一个判断该数据是否是数字格式的方法,由于跟本文主题无关就不展示相应代码 ICellStyle style = book.CreateCellStyle();//创建单元格样式实例 //文字居中 style.Alignment = HorizontalAlignment.Center;//水平居中 style.VerticalAlignment = VerticalAlignment.Center;//垂直居中 //自动换行 style.WrapText = true;
//设置文字样式
IFont font = book.CreateFont();
font.FontName = "宋体";
font.Boldweight = short.MaxValue;
font.FontHeightInPoints = 28;
font.Color = NPOI.HSSF.Util.HSSFColor.Grey50Percent.Index;
style.SetFont(font);//将字体样式加到样式对象中去。
//设置背景色 HSSFPalette palette = book.GetCustomPalette(); //调色板实例 palette.SetColorAtIndex((short)63, (byte)255, (byte)255, (byte)255);//自定义颜色加入调色板 第一个参数:设置调色板新增颜色的编号,自已设置即可,取值范围8-64,第二、第三、第四个参数,组成RGB值 HSSFColor hssfColor = palette.FindColor((byte)255, (byte)255, (byte)255);//FindColor直接找到HSSFColor实例 style.FillForegroundColor = hssfColor.Indexed; style.FillPattern = FillPattern.SolidForeground; dataCell.CellStyle = style; //单元格值类型判断 作者这里的数据都是string类型,想要将string类型的数字转成int类型的数字 if (value.Length>0&&db.isNumber(value) == true) { int intValue = 0; int.TryParse(value, out intValue); dataCell.SetCellValue(intValue);//为单元格赋值 } else { dataCell.SetCellValue(value); } //合并单元格,设置边框 CellRangeAddress region = new CellRangeAddress(startRow, stopRow, startCol, stopCol); sheet.AddMergedRegion(region); sheet.SetEnclosedBorderOfRegion(region, NPOI.SS.UserModel.BorderStyle.Thin, NPOI.HSSF.Util.HSSFColor.Black.Index);
//此方法可用于合并单元格设置边框,第二个参数是边框类型,第三个参数是边框颜色 }