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这一节，我们将综合NPOI的常用功能（包括创建和填充单元格、合并单元格、设置单元格样式和利用公式），做一个工资单的实例。先看创建标题行的代码：
其中用到了我们前面讲的设置单元格样式和合并单元格等内容。接下来我们循环创建公司每个员工的工资单：
其中为了文件打印为单元格增加了黑色边框的样式（如果不设置边框样式，打印出来后是没有边框的）。另外，注意循环过程中excel中的行号随数据源中的行号变化处理。完整代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NPOI.HSSF.UserModel;
using System.IO;
using NPOI.HPSF;
using NPOI.HSSF.Util;
using System.Data;
namespace Payroll
{
public class Program
{
static HSSFWorkbook hssfworkbook;
static void Main(string[] args)
{
InitializeWorkbook();
//写标题文本
HSSFSheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
HSSFCell cellTitle = sheet1.CreateRow(0).CreateCell(0);
cellTitle.SetCellValue("XXX公司2009年10月工资单");
//设置标题行样式
HSSFCellStyle style = hssfworkbook.CreateCellStyle();
style.Alignment = HSSFCellStyle.ALIGN_CENTER;
HSSFFont font = hssfworkbook.CreateFont();
font.FontHeight = 20 * 20;
style.SetFont(font);
cellTitle.CellStyle = style;
//合并标题行
sheet1.AddMergedRegion(new Region(0, 0, 1, 6));
DataTable dt=GetData();
HSSFRow row;
HSSFCell cell;
HSSFCellStyle celStyle=getCellStyle();
HSSFPatriarch patriarch = sheet1.CreateDrawingPatriarch();
HSSFClientAnchor anchor;
HSSFSimpleShape line;
int rowIndex;
for (int i = 0; i < dt.Rows.Count; i++)
{
//表头数据
rowIndex = 3 * (i + 1);
row = sheet1.CreateRow(rowIndex);
cell = row.CreateCell(0);
cell.SetCellValue("姓名");
cell.CellStyle = celStyle;
cell = row.CreateCell(1);
cell.SetCellValue("基本工资");
cell.CellStyle = celStyle;
cell = row.CreateCell(2);
cell.SetCellValue("住房公积金");
cell.CellStyle = celStyle;
cell = row.CreateCell(3);
cell.SetCellValue("绩效奖金");
cell.CellStyle = celStyle;
cell = row.CreateCell(4);
cell.SetCellValue("社保扣款");
cell.CellStyle = celStyle;
cell = row.CreateCell(5);
cell.SetCellValue("代扣个税");
cell.CellStyle = celStyle;
cell = row.CreateCell(6);
cell.SetCellValue("实发工资");
cell.CellStyle = celStyle;
DataRow dr = dt.Rows[i];
//设置值和计算公式
row = sheet1.CreateRow(rowIndex + 1);
cell = row.CreateCell(0);
cell.SetCellValue(dr["FName"].ToString());
cell.CellStyle = celStyle;
cell = row.CreateCell(1);
cell.SetCellValue((double)dr["FBasicSalary"]);
cell.CellStyle = celStyle;
cell = row.CreateCell(2);
cell.SetCellValue((double)dr["FAccumulationFund"]);
cell.CellStyle = celStyle;
cell = row.CreateCell(3);
cell.SetCellValue((double)dr["FBonus"]);
cell.CellStyle = celStyle;
cell = row.CreateCell(4);
cell.SetCellFormula(String.Format("$B{0}*0.08",rowIndex+2));
cell.CellStyle = celStyle;
cell = row.CreateCell(5);
cell.SetCellFormula(String.Format("SUM($B{0}:$D{0})*0.1",rowIndex+2));
cell.CellStyle = celStyle;
cell = row.CreateCell(6);
cell.SetCellFormula(String.Format("SUM($B{0}:$D{0})-SUM($E{0}:$F{0})",rowIndex+2));
cell.CellStyle = celStyle;
//绘制分隔线
sheet1.AddMergedRegion(new Region(rowIndex+2, 0, rowIndex+2, 6));
anchor = new HSSFClientAnchor(0, 125, 1023, 125, 0, rowIndex + 2, 6, rowIndex + 2);
line = patriarch.CreateSimpleShape(anchor);
line.ShapeType = HSSFSimpleShape.OBJECT_TYPE_LINE;
line.LineStyle = HSSFShape.LINESTYLE_DASHGEL;
}
WriteToFile();
}
static DataTable GetData()
{
DataTable dt = new DataTable();
dt.Columns.Add("FName",typeof(System.String));
dt.Columns.Add("FBasicSalary",typeof(System.Double));
dt.Columns.Add("FAccumulationFund", typeof(System.Double));
dt.Columns.Add("FBonus", typeof(System.Double));
dt.Rows.Add("令狐冲", 6000, 1000, 2000);
dt.Rows.Add("任盈盈", 7000, 1000, 2500);
dt.Rows.Add("林平之", 5000, 1000, 1500);
dt.Rows.Add("岳灵珊", 4000, 1000, 900);
dt.Rows.Add("任我行", 4000, 1000, 800);
dt.Rows.Add("风清扬", 9000, 5000, 3000);
return dt;
}
static HSSFCellStyle getCellStyle()
{
HSSFCellStyle cellStyle = hssfworkbook.CreateCellStyle();
cellStyle.BorderBottom = HSSFCellStyle.BORDER_THIN;
cellStyle.BorderLeft = HSSFCellStyle.BORDER_THIN;
cellStyle.BorderRight = HSSFCellStyle.BORDER_THIN;
cellStyle.BorderTop = HSSFCellStyle.BORDER_THIN;
return cellStyle;
}
static void WriteToFile()
{
//Write the stream data of workbook to the root directory
FileStream file = new FileStream(@"test.xls", FileMode.Create);
hssfworkbook.Write(file);
file.Close();
}
static void InitializeWorkbook()
{
hssfworkbook = new HSSFWorkbook();
//create a entry of DocumentSummaryInformation
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI Team";
hssfworkbook.DocumentSummaryInformation = dsi;
//create a entry of SummaryInformation
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Subject = "NPOI SDK Example";
hssfworkbook.SummaryInformation = si;
}
}
}
生成的Excel文件样式如下：
学习教程：http://www.cnblogs.com/atao/archive/2009/10/13/1582832.html
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原文地址：http://www.cnblogs.com/lizihong/p/4320037.html
