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我正在使用NPOI從Excel 2003文件中讀取數據。這些文件包含這樣的公式:SUM('1:2'!$ C $ 17)。 NPOI認可了這樣的公式,例如SUM('1'!$ C $ 17)(不含表2)並評估無效結果。 我使用NPOI從一個例子常規代碼,就像NPOI不評估3d公式
foreach (var row in docRows)
{
sb.AppendFormat("{0}\t", SomeCode);
rowCounter += 1;
sb.AppendFormat("{0}\t", rowCounter);
foreach (var col in docColumns)
{
ICell cell = sheet.GetRow(row).GetCell(col);
sb.AppendFormat("{0}\t", GetExcelCellValue(cell));
}
sb.AppendLine();
}
private string GetExcelCellValue(ICell cell)
{
string cellValue = string.Empty;
IFormulaEvaluator evaluator = _hssfworkbook.GetCreationHelper().CreateFormulaEvaluator();
evaluator.Evaluate(cell);
switch (evaluator.EvaluateInCell(cell).CellType)
{
case CellType.BLANK:
cellValue = string.Empty;
break;
case CellType.BOOLEAN:
cellValue = string.Empty;
break;
case CellType.NUMERIC:
cellValue = Convert.ToString(cell.NumericCellValue); //This is a trick to get the correct value of the cell. NumericCellValue will return a numeric value no matter the cell value is a date or a number.
break;
case CellType.STRING:
throw new ArgumentNullException();
cellValue = cell.StringCellValue;
break;
case CellType.ERROR:
cellValue = string.Empty;
break;
case CellType.FORMULA:
break;
}
return cellValue;
}