使用NPOI将excel表附加到另一个表

Question

我正在尝试将多张工作表中的数据附加到同一工作簿中，并将它们附加到第一张工作表中。

这是我能够完成的事情：

void SomeMethod()
{
    HSSFWorkbook hssfwb;
    using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
    {
       hssfwb = new HSSFWorkbook(file);
    } 
    var BaseSheet = workbook.GetSheetAt(0);
    for (int i = 1; i < workbook.NumberOfSheets; i++)
    {
       AddRowsToBaseSheet(BaseSheet, workbook.GetSheetAt(i), workbook);
    }
}

  private void AddRowsToBaseSheet(ISheet BaseSheet, ISheet sheet, HSSFWorkbook workbook)
    {
        var temp = sheet.GetRowEnumerator();
        while (temp.MoveNext())
        {
            HSSFRow sourceRow = (HSSFRow)temp.Current;
            HSSFRow destinationRow = (HSSFRow)BaseSheet.CreateRow(BaseSheet.LastRowNum + 1);
            CopyRow(workbook, sourceRow, destinationRow);
        }
    }

private void CopyRow(HSSFWorkbook workbook, IRow sourceRow, IRow destinationRow)
    {

        // Loop through source columns to add to new row
        for (int i = 0; i < sourceRow.LastCellNum; i++)
        {
            // Grab a copy of the old/new cell
            ICell oldCell = sourceRow.GetCell(i);
            ICell newCell = destinationRow.CreateCell(i);

            // If the old cell is null jump to next cell
            if (oldCell == null)
            {
                newCell = null;
                continue;
            }



            // Set the cell data type
            newCell.SetCellType(oldCell.CellType);

            // Set the cell data value
            switch (oldCell.CellType)
            {
                case CellType.Blank:
                    newCell.SetCellValue(oldCell.StringCellValue);
                    break;
                case CellType.Boolean:
                    newCell.SetCellValue(oldCell.BooleanCellValue);
                    break;
                case CellType.Error:
                    newCell.SetCellErrorValue(oldCell.ErrorCellValue);
                    break;
                case CellType.Formula:
                    newCell.SetCellFormula(oldCell.CellFormula);
                    break;
                case CellType.Numeric:
                    newCell.SetCellValue(oldCell.NumericCellValue);
                    break;
                case CellType.String:
                    newCell.SetCellValue(oldCell.RichStringCellValue);
                    break;
                case CellType.Unknown:
                    newCell.SetCellValue(oldCell.StringCellValue);
                    break;
            }
        }



    }

我可能会犯一个愚蠢的错误，或者是否还有其他库？

在这种情况下，转换为数据集不起作用，因为列不相关