public Form1()
{
InitializeComponent();
DateTime st = new DateTime(2010, 1, 1);
DateTime ed = new DateTime(2010, 2, 5);
PawnSpan Span = GetPawnSpan(st, ed);
}
public static PawnSpan GetPawnSpan(DateTime iStartDate, DateTime iEndDate)
{
DateTime StartDate, EndDate;
if (iStartDate > iEndDate)
{
EndDate = iStartDate;
StartDate = iEndDate;
}
else
{
StartDate = iStartDate;
EndDate = iEndDate;
}
PawnSpan Result = new PawnSpan();
int LastMonthDay = 0;
Result.Months = (EndDate.Month - StartDate.Month) + (EndDate.Year - StartDate.Year) * 12;
#region 计算上月天数
switch (EndDate.Month)
{
case 1:
LastMonthDay = 31;
break;
case 2:
LastMonthDay = 31;
break;
case 3:
if (DateTime.IsLeapYear(EndDate.Year))
{
LastMonthDay = 29;
}
else
{
LastMonthDay = 28;
}
break;
case 4:
LastMonthDay = 31;
break;
case 5:
LastMonthDay = 30;
break;
case 6:
LastMonthDay = 31;
break;
case 7:
LastMonthDay = 30;
break;
case 8:
LastMonthDay = 31;
break;
case 9:
LastMonthDay = 31;
break;
case 10:
LastMonthDay = 30;
break;
case 11:
LastMonthDay = 31;
break;
case 12:
LastMonthDay = 30;
break;
}
#endregion
if (EndDate.Day < StartDate.Day)
{
Result.Days = LastMonthDay - StartDate.Day + EndDate.Day;
Result.Months = Result.Months - 1;
}
else
{
Result.Days = EndDate.Day - StartDate.Day;
}
if (Result.Days == 0)
{
Result.CountDays = 0;
}
else if (Result.Days <= 5)
{
Result.CountDays = 5;
}
else if (Result.Days <= 15)
{
Result.CountDays = 15;
}
else
{
Result.CountDays = 30;
}
if (Result.Months == 0 && Result.Days == 0)
{
Result.CountDays = 5;
}
//计算整个天数
DateTime CountEndDate = new DateTime();
CountEndDate = StartDate;
CountEndDate = CountEndDate.AddMonths(Convert.ToInt32(Result.Months.ToString()));
CountEndDate = CountEndDate.AddDays(Convert.ToInt32(Result.CountDays.ToString()));
Result.CountDaysAll = CountEndDate.Subtract(StartDate).Days;
Result.DaysAll = EndDate.Subtract(StartDate).Days;
return(Result);
}
