Excel 的点点滴滴

Excel Date to C# date,来自这里的

public static DateTime ConvertToDateTime(double excelDate)
{
    if (excelDate < 1)
    {
        throw new ArgumentException("Excel dates cannot be smaller than 0.");
    }
    DateTime dateOfReference = new DateTime(1900, 1, 1);
    if (excelDate > 60d)
    {
        excelDate = excelDate - 2;
    }
    else
    {
        excelDate = excelDate - 1;
    }
    return dateOfReference.AddDays(excelDate);
}