C#中怎么实现Vb中DateDiff()函数的功能,请指教?
今日写程序时,需要判断一个日期是在当日日期之前还是之后的问题,于是自然地想到了Vb中的的那个DateDiff函数,想也拿来用用,但C#里好象没有这个函数,于是搜了一下,有位大哥写了如下的函数:
private double DateDiff(string howtocompare, System.DateTime startDate, System.DateTime endDate)
{
double diff=0;
System.TimeSpan TS = new System.TimeSpan(endDate.Ticks-startDate.Ticks);
switch (howtocompare.ToLower())
{
case "year":
diff = Convert.ToDouble(TS.TotalDays/365);
break;
case "month":
diff = Convert.ToDouble((TS.TotalDays/365)*12);
break;
case "day":
diff = Convert.ToDouble(TS.TotalDays);
break;
case "hour":
diff = Convert.ToDouble(TS.TotalHours);
break;
case "minute":
diff = Convert.ToDouble(TS.TotalMinutes);
break;
case "second":
diff = Convert.ToDouble(TS.TotalSeconds);
break;
}
return diff;
}
但我觉得此代码不够严谨,却又找不出更好的方法来!
另外开始,我也想到了用操作符“< ”或者“>”
比如:
if(dateTime1 < dateTime2)
{
//do something...
}
但C#好象不支持这样,于是我想到了C#里面的操作符重载,但具体实现我没有把握,我想问问线上的各位大虾,有没有更好的Idea阿?