public static void CheckPeriods(DateTime start, DateTime end, EnmPDH period)
{
if (end < start)
{
throw new ArgumentException("结束时间必须大于开始时间");
}
if (period == EnmPDH.Hour && end.Subtract(start).TotalDays > 1)
{
throw new ArgumentException("按时统计最大支持1天");
}
if (period == EnmPDH.Day && end.Subtract(start).TotalDays > 31)
{
throw new ArgumentException("按日统计最大支持1个月");
}
if (period == EnmPDH.Week && end.Subtract(start).TotalDays > 186)
{
throw new ArgumentException("按周统计最大支持6个月");
}
if (period == EnmPDH.Month && end.Subtract(start).TotalDays > 366)
{
throw new ArgumentException("按月统计最大支持12个月");
}
if (period == EnmPDH.Year && end.Subtract(start).TotalDays > 732)
{
throw new ArgumentException("按月统计最大支持2年");
}
}
public static string GetPeriodDisplay(EnmPDH period)
{
switch (period)
{
case EnmPDH.Year:
return("按年统计");
case EnmPDH.Month:
return("按月统计");
case EnmPDH.Week:
return("按周统计");
case EnmPDH.Day:
return("按日统计");
case EnmPDH.Hour:
return("按时统计");
default:
return("未定义");
}
}
/// <summary>
/// 获得时间周期
/// </summary>
public static List <Period> GetPeriods(DateTime start, DateTime end, EnmPDH period)
{
var dates = new List <Period>();
if (period == EnmPDH.Month)
{
while (start <= end)
{
var date = new DateTime(start.Year, start.Month, 1).AddMonths(1).AddSeconds(-1);
if (date > end)
{
date = end;
}
dates.Add(new Period {
Name = MonthConverter(start), Start = start, End = date
});
start = date.AddSeconds(1);
}
}
else if (period == EnmPDH.Week)
{
while (start <= end)
{
var date = start.Date.AddSeconds((8 - (int)start.DayOfWeek) * 86400 - 1);
if (date > end)
{
date = end;
}
dates.Add(new Period {
Name = WeekConverter(start), Start = start, End = date
});
start = date.AddSeconds(1);
}
}
else if (period == EnmPDH.Day)
{
while (start <= end)
{
var date = start.Date.AddSeconds(86399);
if (date > end)
{
date = end;
}
dates.Add(new Period {
Name = DateConverter(start), Start = start, End = date
});
start = date.AddSeconds(1);
}
}
else if (period == EnmPDH.Hour)
{
while (start <= end)
{
var date = new DateTime(start.Year, start.Month, start.Day, start.Hour, 0, 0).AddSeconds(3599);
if (date > end)
{
date = end;
}
dates.Add(new Period {
Name = TimeConverter(start), Start = start, End = date
});
start = date.AddSeconds(1);
}
}
return(dates);
}
