/// <summary>
/// Returns the previous month
/// </summary>
/// <param name="presentMonth">Present Month</param>
/// <returns>Previous Month</returns>
public static MonthInfo GetPreviousMonth(MonthInfo presentMonth)
{
int month = presentMonth.Month;
int year = presentMonth.Year;
month--;
if (month < 1)
{
year--;
month = 12;
}
return(new MonthInfo(new DateTime(year, month, 1)));
}
/// <summary>
/// Returns the next month
/// </summary>
/// <param name="presentMonth">Present Month</param>
/// <returns></returns>
public static MonthInfo GetNextMonth(MonthInfo presentMonth)
{
int month = presentMonth.Month;
int year = presentMonth.Year;
month++;
if (month > 12)
{
year++;
month = 1;
}
return(new MonthInfo(new DateTime(year, month, 1)));
}
public static void GetNextPrevDates(DTC.RangeEnum range, DateTime date, NextPrevEnum np, out DateTime startDate, out DateTime endDate)
{
startDate = DateTime.Today;
endDate = DateTime.Today;
if (range == DTC.RangeEnum.Day)
{
if (np == NextPrevEnum.Next)
{
startDate = date.AddDays(1);
endDate = startDate;
}
if (np == NextPrevEnum.Previous)
{
startDate = date.AddDays(-1);
endDate = startDate;
}
if (np == NextPrevEnum.Today)
{
startDate = date;
endDate = startDate;
}
}
else if (range == DTC.RangeEnum.Week)
{
WeekInfo week = new WeekInfo(date);
if (np == NextPrevEnum.Next)
{
startDate = GetNextWeek(week).StartDate;
endDate = GetNextWeek(week).EndDate;
}
if (np == NextPrevEnum.Previous)
{
startDate = GetPreviousWeek(week).StartDate;
endDate = GetPreviousWeek(week).EndDate;
}
if (np == NextPrevEnum.Today)
{
startDate = week.StartDate;
endDate = week.EndDate;
}
}
else if (range == DTC.RangeEnum.Month)
{
MonthInfo month = new MonthInfo(date);
if (np == NextPrevEnum.Next)
{
startDate = GetNextMonth(month).StartDate;
endDate = GetNextMonth(month).EndDate;
}
if (np == NextPrevEnum.Previous)
{
startDate = GetPreviousMonth(month).StartDate;
endDate = GetPreviousMonth(month).EndDate;
}
if (np == NextPrevEnum.Today)
{
startDate = month.StartDate;
endDate = month.EndDate;
}
}
else if (range == DTC.RangeEnum.Quarter)
{
QuarterInfo quarter = new QuarterInfo(date);
if (np == NextPrevEnum.Next)
{
startDate = GetNextQuarter(quarter).StartDate;
endDate = GetNextQuarter(quarter).EndDate;
}
if (np == NextPrevEnum.Previous)
{
startDate = GetPreviousQuarter(quarter).StartDate;
endDate = GetPreviousQuarter(quarter).EndDate;
}
if (np == NextPrevEnum.Today)
{
startDate = quarter.StartDate;
endDate = quarter.EndDate;
}
}
else if (range == DTC.RangeEnum.Year)
{
if (np == NextPrevEnum.Next)
{
startDate = new YearInfo(date.Year + 1).StartDate;
endDate = new YearInfo(date.Year + 1).EndDate;
}
if (np == NextPrevEnum.Previous)
{
startDate = new YearInfo(date.Year - 1).StartDate;
endDate = new YearInfo(date.Year - 1).EndDate;
}
if (np == NextPrevEnum.Today)
{
startDate = new YearInfo(date.Year).StartDate;
endDate = new YearInfo(date.Year).EndDate;
}
}
}
