如何将边框样式应用于NPOI工作簿单元格

Question

我没有在互联网上的任何地方找到这些信息，所以我想在这里发帖，因为我自己找到了答案。

我想在电子表格中使用NPOI创建具有边框的单元格，并且如何做到这一点并不明显。

Answer 1

以下是一些示例代码，用于创建要应用于单元格的单元格样式，以便它们具有边框。

// create workbook, sheet and a row
HSSFWorkbook wb = new HSSFWorkbook();
var sheet = wb.CreateSheet("Sheet1");
var row = sheet.CreateRow(0);

// create font style
HSSFFont myFont = (HSSFFont)wb.CreateFont();
myFont.FontHeightInPoints = (short)11;
myFont.FontName = "Tahoma";

// create bordered cell style
HSSFCellStyle borderedCellStyle = (HSSFCellStyle)wb.CreateCellStyle();
borderedCellStyle.SetFont(myFont);
borderedCellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Medium;
borderedCellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Medium;
borderedCellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Medium;
borderedCellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Medium;

// create standard cell style
HSSFCellStyle standardCellStyle = (HSSFCellStyle)wb.CreateCellStyle();
standardCellStyle.SetFont(myFont);

// create cell and apply bordered style
var cell = row.CreateCell(0);
cell.SetCellValue("I have a border");
cell.CellStyle = borderedCellStyle;

// create cell and apply standard stlye
var cell = row.CreateCell(1);
cell.SetCellValue("I have NO border");
cell.CellStyle = standardCellStyle;

Answer 2

对于XSSF文件。采取这种方法

XSSFSheet sheet = (XSSFSheet)workbook.CreateSheet("Demo");
XSSFCellStyle defaultStyle = (XSSFCellStyle)workbook.CreateCellStyle();
defaultStyle.WrapText = true;
defaultStyle.Alignment = HorizontalAlignment.Left;
defaultStyle.VerticalAlignment = VerticalAlignment.Top;
defaultStyle.BorderBottom = BorderStyle.Thin;
defaultStyle.BorderTop = BorderStyle.Thin;
defaultStyle.BorderLeft = BorderStyle.Thin;
defaultStyle.BorderRight = BorderStyle.Thin;

sheet.SetColumnWidth(colIndex,   100);  
sheet.SetDefaultColumnStyle(colIndex, defaultStyle);