NPOI 导出Excel插入图片、设置边框样式、合并单元格、字体样式等小知识

1.设置单元格上边框为黑色实线

ICellStyle cellStyleTail = sheet.Workbook.CreateCellStyle();

cellStyleTail.BorderTop = BorderStyle.Thin;

https://blog.csdn.net/ezreal_pan/article/details/81134701

2.插入图片方法

#region 插入图片

   var path = AppDomain.CurrentDomain.BaseDirectory + "File/Images/logo1.png";

   byte[] bytes = System.IO.File.ReadAllBytes(path);

   int pictureIdx = workbook.AddPicture(bytes, PictureType.PNG);

   IDrawing patriarch = sheet.CreateDrawingPatriarch();

 

    //HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 100, 50, col, row, col + 1, row + 1);

    //##处理照片位置，【图片左上角为（col, row）第row+1行col+1列，右下角为（ col +1, row +1）第 col +1+1行row +1+1列，宽为100，高为50

    //public XSSFClientAnchor(int dx1, int dy1, int dx2, int dy2, int col1, int row1, int col2, int row2);

   IClientAnchor anchor = new XSSFClientAnchor(0, 0, 250, 167, 7, 0, 9, 0);

   IPicture pict = (XSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);

   pict.Resize();

#endregion

3.合并单元格

// 指从0行到0行，从0列到第4列合并

sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 4));

4.居中

ICellStyle cellStyleCenter = sheet.Workbook.CreateCellStyle();

cellStyleCenter.Alignment = HorizontalAlignment.Center;

5. 字体加粗、字号大小

//字体加粗

ICellStyle cellStyleTitle = sheet.Workbook.CreateCellStyle();

var font = workbook.CreateFont();

font.Boldweight = (short)FontBoldWeight.Bold;

font.FontHeightInPoints = 12;

//font.FontHeightInPoints = (short)8.5;字号为小数时要转为short

cellStyleTitle.SetFont(font);

6.将样式作用在哪个单元格中

//將樣式cellStyleTitle作用在行rowTitle2列Cells[0]上

rowTitle2.Cells[0].CellStyle = cellStyleTitle;

7.创建excel、样式、sheet、行等

//新建一个excel

XSSFWorkbook workbook = new XSSFWorkbook();

//excel样式

XSSFCellStyle style = (XSSFCellStyle)workbook.CreateCellStyle();    

//创建一个sheet

ISheet sheet = workbook.CreateSheet(Table.TableName);

//创建一个样式

ICellStyle cellStyleTitle = sheet.Workbook.CreateCellStyle();

//创建一个行

NPOI.SS.UserModel.IRow rowTitle2 = sheet.CreateRow(0);

8.单元格赋值

rowTitle2.CreateCell(0).SetCellValue("STATEMENT OF ACCOUNT");

9. 给指定sheet的内容设置每列宽度

List<int> widthlist = new List<int>();

for (var i = 0; i < 9; i++)

    {

        widthlist.Add(3000);

}

int[] widths = widthlist.ToArray()

//给指定sheet的内容设置每列宽度（index从0开始，width1000相当于excel设置的列宽3.81）

for (int i = 0; i < widths.Length; i++)

    {

       sheet.SetColumnWidth(i, widths[i]);

     }

10.设置无边距

//创建一个sheet

ISheet sheet = workbook.CreateSheet(dt.TableName);

sheet.SetMargin(MarginType.LeftMargin, 0);

sheet.SetMargin(MarginType.RightMargin, 0);

sheet.SetMargin(MarginType.BottomMargin, 0);

sheet.SetMargin(MarginType.TopMargin, 0);

sheet.FitToPage = false;

11.单元格背景颜色

ICellStyle cellStyleBold = sheet.Workbook.CreateCellStyle();

cellStyleBold.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Yellow.Index;

cellStyleBold.FillPattern = FillPattern.SolidForeground;

rowEnd3.Cells[0].CellStyle = cellStyleBold;

颜色对照表

https://www.cnblogs.com/byxxw/p/5265127.html