WinForm项目开发中NPOI用法实例解析

本文实例展示了WinForm项目开发中NPOI用法，对于C#初学者有一定的借鉴价值。具体实例如下：

private void ExportMergeExcel()
{
 if (File.Exists(templateXlsPath))
 {
int i = 4, _recordNo = 1;
using (FileStream file = new FileStream(templateXlsPath, FileMode.Open, FileAccess.Read))
{
  HSSFWorkbook _excel = new HSSFWorkbook(file);
  ICellStyle _cellStyle = CreateCellStly(_excel);
  ISheet _sheetBasic = _excel.GetSheet(ExcelReadHelper.sheet_BasicInfo.Replace("$", ""));
  ISheet _sheetStreatLamp = _excel.GetSheet(ExcelReadHelper.sheet_LampMoreLess.Replace("$", ""));
  ISheet _sheetBasicEx = _excel.GetSheet(ExcelReadHelper.sheet_BasicExInfo.Replace("$", ""));
  ISheet _sheetStreatLampEx = _excel.GetSheet(ExcelReadHelper.sheet_LampMoreLessExInfo.Replace("$", ""));

ISheet _sheetBasicTeamEx = _excel.GetSheet(ExcelReadHelper.sheet_BasicTeamStatistics.Replace("$", ""));
  ISheet _sheetBasicLampTypeEx = _excel.GetSheet(ExcelReadHelper.sheet_BasicTypeStatistics.Replace("$", ""));
  ISheet _sheetStreetLampMLEx = _excel.GetSheet(ExcelReadHelper.sheet_LampMoreLessTeamStatistics.Replace("$", ""));
  ISheet _sheetStreetLampTeamML = _excel.GetSheet(ExcelReadHelper.sheet_LampMoreLessTypeStatistics.Replace("$", ""));

file.Close();

FillBasicSheetDb(_sheetBasic, i, _recordNo);
  _recordNo = 1; i = 4;
  FillStreetLampDb(_sheetStreatLamp, i, _recordNo);

_recordNo = 1; i = 4;
  FillBasicExSheetDb(_sheetBasicEx, i, _recordNo);

_recordNo = 1; i = 4;
  FillStreetLampExDb(_sheetStreatLampEx, i, _recordNo);

i = 1; IRow _rowSum = null; int _lampTotalLampCnt = 0, _colLampCnt = 0, _ncolLampCnt = 0; double _lampTotalLampPw = 0, _colLampPw = 0, _ncolLampPw = 0;
  FillBasicTeamExSheetDb(_excel, _rowSum, _sheetBasicTeamEx, _cellStyle, i, _lampTotalLampCnt, _colLampCnt, _ncolLampCnt, _lampTotalLampPw, _colLampPw, _ncolLampPw);

i = 1; _lampTotalLampCnt = 0; _colLampCnt = 0; _ncolLampCnt = 0; _lampTotalLampPw = 0; _colLampPw = 0; _ncolLampPw = 0;
  FillbasicLampTypeExSheetDb(_excel, _rowSum, _sheetBasicLampTypeEx, _cellStyle, i, _lampTotalLampCnt, _colLampCnt, _ncolLampCnt, _lampTotalLampPw, _colLampPw, _ncolLampPw);

_lampTotalLampCnt = 0; _lampTotalLampPw = 0; i = 1;
  FillsheetStreetLampMLSheetDb(_excel, _rowSum, _sheetStreetLampMLEx, _cellStyle, i, _lampTotalLampCnt, _lampTotalLampPw);

_lampTotalLampCnt = 0; _lampTotalLampPw = 0; i = 1;
  FillStreetLampTeamMLSheetDb(_excel, _rowSum, _sheetStreetLampTeamML, _cellStyle, i, _lampTotalLampCnt, _lampTotalLampPw);

OutPutMergeExcel(_excel);
}
 }
}
private void FillBasicTeamExSheetDb(HSSFWorkbook _excel, IRow _rowSum, ISheet _sheetBasicTeamEx, ICellStyle _cellStyle, int i, int _lampTotalLampCnt, int _colLampCnt, int _ncolLampCnt, double _lampTotalLampPw, double _colLampPw, double _ncolLampPw)
{
 foreach (ExcelStatistics excelBasicEx in basicTeamExList)
 {
IRow _row = _sheetBasicTeamEx.CreateRow(i);
ExcelWriteHelper.CreateStatisticsExcelRow(_row, excelBasicEx, "BasicTeam");
#region 总灯数
int _lTotalLampCnt = 0;
int.TryParse(excelBasicEx.LampCount, out _lTotalLampCnt);
_lampTotalLampCnt += _lTotalLampCnt;
#endregion
#region 总计算功率(KW)
double _lTotalLampPw = 0;
double.TryParse(excelBasicEx.LampPower, out _lTotalLampPw);
_lampTotalLampPw += _lTotalLampPw;
#endregion
#region 汇总灯数
int _cLampCount = 0;
int.TryParse(excelBasicEx.CollectCount, out _cLampCount);
_colLampCnt += _cLampCount;
#endregion
#region 汇总功率(KW)
double _cLampPw = 0;
double.TryParse(excelBasicEx.CollectPower, out _cLampPw);
_colLampPw += _cLampPw;
#endregion
#region 非汇总灯数
int _ncLampCount = 0;
int.TryParse(excelBasicEx.NotCollectCount, out _ncLampCount);
_ncolLampCnt += _ncLampCount;
#endregion
#region 非汇总功率(KW)
double _ncLampPw = 0;
double.TryParse(excelBasicEx.NotCollectPower, out _ncLampPw);
_ncolLampPw += _ncLampPw;
#endregion
i++;
 }
 _rowSum = _sheetBasicTeamEx.CreateRow(i);
 _rowSum.HeightInPoints = 20;

_rowSum.CreateCell(0).SetCellValue("合计：");
 _rowSum.CreateCell(1).SetCellValue(_lampTotalLampCnt);
 _rowSum.CreateCell(2).SetCellValue(_lampTotalLampPw);
 _rowSum.CreateCell(3).SetCellValue(_colLampCnt);
 _rowSum.CreateCell(4).SetCellValue(_colLampPw);
 _rowSum.CreateCell(5).SetCellValue(_ncolLampCnt);
 _rowSum.CreateCell(6).SetCellValue(_ncolLampPw);
 SetRowStyle(_rowSum, _cellStyle);
}

定义样式：

/// <summary>
/// 样式创建
/// eg:
///private ICellStyle CreateCellStly(HSSFWorkbook _excel)
///{
///  IFont _font = _excel.CreateFont();
///  _font.FontHeightInPoints = 11;
///  _font.FontName = "宋体";
///  _font.Boldweight = (short)FontBoldWeight.Bold;
///  ICellStyle _cellStyle = _excel.CreateCellStyle();
///  //_cellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LightGreen.Index;
///  //_cellStyle.FillPattern = NPOI.SS.UserModel.FillPattern.SolidForeground;
///  _cellStyle.SetFont(_font);
///  return _cellStyle;
///}
/// 为行设置样式
/// </summary>
/// <param name="row">IRow</param>
/// <param name="cellStyle">ICellStyle</param>
public static void SetRowStyle(this IRow row, ICellStyle cellStyle)
{
 if (row != null && cellStyle != null)
 {
for (int u = row.FirstCellNum; u < row.LastCellNum; u++)
{
  ICell _cell = row.GetCell(u);
  if (_cell != null)
_cell.CellStyle = cellStyle;
}
 }
}