/**
* @param dateFormat pass <code>null</code> for default YYYYMMDD
* @return <code>null</code> if timeStr is <code>null</code>
*/
private static Double ConvertDate(String dateStr, SimpleDateFormat dateFormat)
{
if (dateStr == null)
{
return(Double.NaN);
}
DateTime dateVal;
if (dateFormat == null)
{
dateVal = HSSFDateUtil.ParseYYYYMMDDDate(dateStr);
}
else
{
try
{
dateVal = DateTime.Parse(dateStr, CultureInfo.CurrentCulture);
}
catch (FormatException e)
{
throw new InvalidOperationException("Failed to parse date '" + dateStr
+ "' using specified format '" + dateFormat + "'", e);
}
}
return(HSSFDateUtil.GetExcelDate(dateVal));
}
/**
* @return <code>null</code> if timeStr is <code>null</code>
*/
private static Double ConvertTime(String timeStr)
{
if (timeStr == null)
{
return(Double.NaN);
}
return(HSSFDateUtil.ConvertTime(timeStr));
}
/// <summary>
/// Check if a cell Contains a date, Checking only for internal
/// excel date formats.
/// As Excel stores a great many of its dates in "non-internal"
/// date formats, you will not normally want to use this method.
/// </summary>
/// <param name="cell">The cell.</param>
/// <returns>
/// <c>true</c> if [is cell internal date formatted] [the specified cell]; otherwise, <c>false</c>.
/// </returns>
public static bool IsCellInternalDateFormatted(HSSFCell cell)
{
if (cell == null)
{
return(false);
}
bool bDate = false;
double d = cell.NumericCellValue;
if (HSSFDateUtil.IsValidExcelDate(d))
{
HSSFCellStyle style = cell.CellStyle;
int i = style.DataFormat;
bDate = IsInternalDateFormat(i);
}
return(bDate);
}
/// <summary>
/// Check if a cell Contains a date
/// Since dates are stored internally in Excel as double values
/// we infer it Is a date if it Is formatted as such.
/// </summary>
/// <param name="cell">The cell.</param>
/// <returns>
/// <c>true</c> if [is cell date formatted] [the specified cell]; otherwise, <c>false</c>.
/// </returns>
public static bool IsCellDateFormatted(HSSFCell cell)
{
if (cell == null)
{
return(false);
}
bool bDate = false;
double d = cell.NumericCellValue;
if (HSSFDateUtil.IsValidExcelDate(d))
{
HSSFCellStyle style = cell.CellStyle;
int i = style.DataFormat;
String f = style.GetDataFormatString(cell.BoundWorkbook);
bDate = IsADateFormat(i, f);
}
return(bDate);
}
