asp.net Npoi 使用

HSSFWorkbook hssfworkbook = new HSSFWorkbook(); //增加 Excel
NPOI.SS.UserModel.ISheet SheetName = hssfworkbook.CreateSheet(Dr_Subject["SubjectName"].ToString());//增加 Sheet
NPOI.SS.UserModel.IRow SheetRows = SheetName.CreateRow(RowCount); //行
NPOI.SS.UserModel.ICell cell = SheetRows.CreateCell(ColCount);//列
cell.SetCellValue(Dt_Grade.Rows[i]["GradeName"].ToString() + "排班");//值
NPOI.SS.Util.CellRangeAddress cellRangeAddress = new NPOI.SS.Util.CellRangeAddress(rowstart, rowend, colstart, colend);//合并单元格
sheet.AddMergedRegion(cellRangeAddress);//合并单元格
SheetRows.GetCell(ColCount).CellStyle = CellStyle() //设置样式

private NPOI.SS.UserModel.ICellStyle CellStyle()
    {
        NPOI.SS.UserModel.ICellStyle style = hssfworkbook.CreateCellStyle();//单元格的样式
        NPOI.SS.UserModel.IFont font = hssfworkbook.CreateFont();//单元格的字体

        font.FontName = "<SPAN style='COLOR: #faebde'>'宋体'</SPAN>";
        font.FontHeightInPoints = 10;
        font.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.BOLD;

        style.SetFont(font);//单元格的字体

        style.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;//水平居中
        style.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.CENTER;//垂直居中

        Color LevelOneColor = Color.FromArgb(255, 153, 0);
        style.FillPattern = NPOI.SS.UserModel.FillPatternType.SOLID_FOREGROUND;//填充
        style.FillForegroundColor = GetXLColour(hssfworkbook, LevelOneColor); //调用GetXLColour方法  

        //有边框
        style.BorderBottom = NPOI.SS.UserModel.CellBorderType.THIN;
        style.BorderLeft = NPOI.SS.UserModel.CellBorderType.THIN;
        style.BorderTop = NPOI.SS.UserModel.CellBorderType.THIN;
        style.BorderRight = NPOI.SS.UserModel.CellBorderType.THIN;

       SheetName.SetColumnWidth(Col, 16 * 256);

        return style;

    }

防止重复添加行

  for (int StCount = 0; StCount < Dt_WHF.Rows.Count; StCount++)
    {

        if (SheetName.GetRow(Xh) == null)//没创建行情况
       {
           RowSt = SheetName.CreateRow(Xh); //
       }
       else
       {
           RowSt = SheetName.GetRow(Xh); //创建行的情况

       }

       Xh = Xh + 1;
       RowCount = RowCount + 1;

       StudentsXuHao = StCount+1;

       NPOI.SS.UserModel.ICell CellSt_Xuhao = RowSt.CreateCell(0);//这里创建添加列
       CellSt_Xuhao.SetCellValue(StudentsXuHao.ToString());//这里设置列值

       NPOI.SS.UserModel.ICell CellSt = RowSt.CreateCell(ClassCount + 1);//这里创建添加列
       CellSt.SetCellValue(Dt_WHF.Rows[StCount]["StName"].ToString());//这里设置列值

    }