今天在做項目中,遇到使用代碼生成具有一定樣式的Excel,找了很多資料,最后終于解決了,Excel中格式的設置,以及單元格的合并等等。下面就介紹下,使用NPOI類庫操作Excel的方法。
1.首先我們先在內存中生成一個Excel文件,代碼如下:
HSSFWorkbook book = new HSSFWorkbook();
ISheet sheet = book.CreateSheet("Sheet1");
2.然后在新創建的sheet里面,創建我們的行和列,代碼如下:
IRow row = sheet.CreateRow(index);//index代表多少行
row.HeightInPoints = 35;//行高
ICell cell = row.CreateCell(0);//創建第一列
cell.SetCellValue(“設置單元格的值”);
3.設置單元格的樣式已經字體大小,邊框,以及合并單元格
(1).創建單元格字體的樣式及大小
/// <summary>
/// 獲取字體樣式
/// </summary>
/// <param name="hssfworkbook">Excel操作類</param>
/// <param name="fontname">字體名</param>
/// <param name="fontcolor">字體顏色</param>
/// <param name="fontsize">字體大小</param>
/// <returns></returns>
public static IFont GetFontStyle(HSSFWorkbook hssfworkbook, string fontfamily, HSSFColor fontcolor, int fontsize)
{
IFont font1 = hssfworkbook.CreateFont();
if (string.IsNullOrEmpty(fontfamily))
{
font1.FontName = fontfamily;
}
if (fontcolor != null)
{
font1.Color = fontcolor.GetIndex();
}
font1.IsItalic = true;
font1.FontHeightInPoints = (short)fontsize;
return font1;
}
(2).設置單元格內顯示數據的格式
ICell cell = row.CreateCell(1);
ICellStyle cellStyleNum = Excel.GetICellStyle(book);
IDataFormat formatNum = book.CreateDataFormat();
cellStyleNum.DataFormat = formatNum.GetFormat("0.00E+00");//設置單元格的格式為科學計數法cell.CellStyle = cellStyleNum;
(3).創建單元格的邊框,背景顏色,以及對齊方式
/// <summary>
/// 獲取單元格樣式
/// </summary>
/// <param name="hssfworkbook">Excel操作類</param>
/// <param name="font">單元格字體</param>
/// <param name="fillForegroundColor">圖案的顏色</param>
/// <param name="fillPattern">圖案樣式</param>
/// <param name="fillBackgroundColor">單元格背景</param>
/// <param name="ha">垂直對齊方式</param>
/// <param name="va">垂直對齊方式</param>
/// <returns></returns>
public static ICellStyle GetCellStyle(HSSFWorkbook hssfworkbook, IFont font, HSSFColor fillForegroundColor, FillPatternType fillPattern, HSSFColor fillBackgroundColor, HorizontalAlignment ha, VerticalAlignment va)
{
ICellStyle cellstyle = hssfworkbook.CreateCellStyle();
cellstyle.FillPattern = fillPattern;
cellstyle.Alignment = ha;
cellstyle.VerticalAlignment = va;
if (fillForegroundColor != null)
{
cellstyle.FillForegroundColor = fillForegroundColor.GetIndex();
}
if (fillBackgroundColor != null)
{
cellstyle.FillBackgroundColor = fillBackgroundColor.GetIndex();
}
if (font != null)
{
cellstyle.SetFont(font);
}
//有邊框
cellstyle.BorderBottom = CellBorderType.THIN;
cellstyle.BorderLeft = CellBorderType.THIN;
cellstyle.BorderRight = CellBorderType.THIN;
cellstyle.BorderTop = CellBorderType.THIN;
return cellstyle;
}
(4).合并單元格
/// <summary>
/// 合并單元格
/// </summary>
/// <param name="sheet">要合并單元格所在的sheet</param>
/// <param name="rowstart">開始行的索引</param>
/// <param name="rowend">結束行的索引</param>
/// <param name="colstart">開始列的索引</param>
/// <param name="colend">結束列的索引</param>
public static void SetCellRangeAddress(ISheet sheet, int rowstart, int rowend, int colstart, int colend)
{
CellRangeAddress cellRangeAddress = new CellRangeAddress(rowstart, rowend, colstart, colend);
sheet.AddMergedRegion(cellRangeAddress);
}
4.將Excel文件輸出
FileStream stream = File.OpenWrite(@"F:/test.xls"); ;
book.Write(stream);
stream.Close();
以上就是使用NPOI動態生成Excel的行和列,以及單元格的樣式,具體的可以參考Demo下載.
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