MinutesBetween Returns the number of minutes between two specified TDateTime values.UnitDateUtilsCategorydate/time routinesfunction MinutesBetween(const ANow, AThen: TDateTime): Int64;DescriptionCall MinutesBetween to obtain the difference, in minutes, between two TDateTime values. MinutesBetween counts only entire minutes that have elapsed. Thus, MinutesBetween reports the difference between 9:00:00 AM and 9:00:59:999 AM as 0 because the difference is one millisecond short of an entire minute.
(date1-date2)*24;//小时数
(date1-date2)*24*60;//分钟数
(date1-date2)*24*60*60;//秒数
date1:=StrToDateTime('2005-10-9 08:10:20');
date2:=StrToDateTime('2005-10-9 08:32:24');
其实我是一时糊涂了,老想着java里的add、after之类的,其实你们只要告诉我直接用大于小于或者直接相减我就明白啦。不过,还有,如果拿楼上的两个数直接相减自然是得不到我要的minute的,还需要format之类的转化一下,如果楼上的这样告诉我我就会感激不尽啦,不过还是谢谢你,让我明白能不偷懒的时候还是不用偷懒比较好,这么简单的问题自己去查一下文档会最快的得到答案
Returns the number of minutes between two specified TDateTime values.UnitDateUtilsCategorydate/time routinesfunction MinutesBetween(const ANow, AThen: TDateTime): Int64;DescriptionCall MinutesBetween to obtain the difference, in minutes, between two TDateTime values. MinutesBetween counts only entire minutes that have elapsed. Thus, MinutesBetween reports the difference between 9:00:00 AM and 9:00:59:999 AM as 0 because the difference is one millisecond short of an entire minute.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ShowMessage('2:'+DateTimeToStr(DateTimePicker2.DateTime)+#13+'1:'+DateTimeToStr(DateTimePicker1.DateTime)+#13+intToStr( round((DateTimePicker2.DateTime-DateTimePicker1.DateTime)*24*60)));ShowMessage(intToStr(round((DateTimePicker2.DateTime-DateTimePicker1.DateTime)*24*60)));//////怎么会呢
gxgyj(Jackson...)直接减的结果跟MinutesBetween的不同是小减大的时候,一个得到负值,一个始终是绝对值。在需要得到绝对值的情况下,相比MinutesBetween就方便多了,呵呵!