// CurrentShowingMonthChanged事件处理程序
private void CurrentShowingMonthChangedHandler(object o)
{
DateMonth dateMonth = o as DateMonth;
if (dateMonth == null)
{
throw new ArgumentException();
}
currentSelectedDate = new DateTime(dateMonth.Year, dateMonth.Month, currentSelectedDate.Day);
OnCurrentSelectedDateChanged();
}
/// <summary>
/// 比较两个DateMonth类型相距的月份数，返回正数说明this更大，否则anotherMonth更大
/// </summary>
/// <param name="anotherMonth">待比较的月份</param>
/// <returns></returns>
public int Compare(DateMonth anotherMonth)
{
if (this.Year == anotherMonth.Year)
{
return(this.Month - anotherMonth.Month);
}
else if (this.Year - anotherMonth.Year == 1)
{
return(this.Month + (12 - anotherMonth.Month));
}
else if (this.Year - anotherMonth.Year == -1)
{
return(-((12 - this.Month) + anotherMonth.Month));
}
else if (this.Year - anotherMonth.Year > 1)
{
return((this.Year - anotherMonth.Year - 1) * 12 + this.Month + (12 - anotherMonth.Month));
}
else
{
return(-(this.Year - anotherMonth.Year - 1) * 12 + -((12 - this.Month) + anotherMonth.Month));
}
}
/// <summary>
/// 比较该月份与另一月份相距的月份数，返回正数说明this更大，否则anotherMonth更大
/// </summary>
/// <param name="year">年</param>
/// <param name="month">月</param>
/// <returns></returns>
public int Compare(int year, int month)
{
DateMonth dateMonth = new DateMonth(year, month);
return(Compare(dateMonth));
}
private static void OnCurrentShowingMonthChanged(DateMonth dateMonth)
{
CurrentShowingMonthChanged?.Invoke(dateMonth);
}
