如何使用 NPOI 更改单元格颜色

Question

using NPOI.XSSF.UserModel;
using NPOI.XSSF.Model;

using NPOI.HSSF.UserModel;
using NPOI.HSSF.Model;

using NPOI.SS.UserModel;
using NPOI.SS.Util;


(...)

XSSFWorkbook hssfwb;

using (FileStream file = new FileStream(@"D:\VB\XLSX teste com NPOI\XLSX 1\Book1.xlsx", 
     FileMode.Open, FileAccess.Read))
{
    hssfwb = new XSSFWorkbook(file);
    file.Close();
}

ISheet sheet = hssfwb.GetSheetAt(0);
IRow row = sheet.GetRow(0);

ICell cell = row.CreateCell(5);
cell.SetCellValue("test");
cell.CellStyle.FillBackgroundColor = IndexedColors.BrightGreen.Index;
cell.CellStyle.FillPattern = FillPattern.SolidForeground;

using (FileStream file = new FileStream(@"D:\VB\XLSX teste com NPOI\XLSX 1\Book1ee22.xlsx", 
     FileMode.Create, FileAccess.Write))
{
    hssfwb.Write(file);
    file.Close();
}

NPOI 版本：2.1.3.1 我有这段代码，它正在改变孔板的颜色，而不仅仅是单元格...改变单元格填充颜色的正确方法是什么？

---

这是工作代码，基于下面标记为正确的答案：

XSSFWorkbook hssfwb;
        using (FileStream file = new FileStream(@"D:\Copy D\Tech\VB\XLSX teste com NPOI\XLSX 1\Book1.xlsx", FileMode.Open, FileAccess.Read))
        {
            hssfwb = new XSSFWorkbook(file);
            file.Close();
        }

        ISheet sheet = hssfwb.GetSheetAt(0);
        IRow row = sheet.GetRow(0);


        ICellStyle testeStyle = hssfwb.CreateCellStyle();
        testeStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Medium;
        testeStyle.FillForegroundColor = IndexedColors.BrightGreen.Index;
        testeStyle.FillPattern = FillPattern.SolidForeground;


        ICell cell = row.CreateCell(5);
        cell.SetCellValue("testeeerere");
        cell.CellStyle = testeStyle;


        using (FileStream file = new FileStream(@"D:\Copy D\Tech\VB\XLSX teste com NPOI\XLSX 1\Book1ee22.xlsx", FileMode.Create, FileAccess.Write))
        {
            hssfwb.Write(file);
            file.Close();
        }

Answer 1

看看这个例子：

using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.SS.Util;

(...)

Row row = sheet.CreateRow(0);

//styling
Font boldFont = workbook.CreateFont();
boldFont.Boldweight = (short)FontBoldWeight.BOLD;
ICellStyle boldStyle = workbook.CreateCellStyle();
boldStyle.SetFont(boldFont);

boldStyle.BorderBottom = CellBorderType.MEDIUM;
boldStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.GREY_25_PERCENT.index;
boldStyle.FillPattern = FillPatternType.SOLID_FOREGROUND;


for (int i = 0; i < columns.Length; i++)
{
    Cell cell = row.CreateCell(i);
    cell.SetCellValue(columns[i]);
    cell.CellStyle = boldStyle;
}

在这里，您可以看到如何为一行中的每个单元格应用粗体、背景颜色和边框。在此示例中，columns 是表示列数据的字符串数组；改用你的价值观。