C# 时间函数相减

1：第一种方式：

string firsttime = "20140226120201";

string secondtime = "20140225115401";

DateTime firstDateTemp = DateTime.ParseExact(firsttime, "yyyyMMddHHmmss", new System.Globalization.CultureInfo("zh-CN", true));

DateTime secondDateTemp = DateTime.ParseExact(secondtime, "yyyyMMddHHmmss", new System.Globalization.CultureInfo("zh-CN", true));            

TimeSpan span = firstDateTemp.Subtract(secondDateTemp);

然后，如果相差一天，那么span.Days=1，如果是一年，那么span.Days=365<br>             span.Hours, span.Minutes就不举例了

2：第二种方式：

DateTime onetime = DateTime.Parse("2014-2-26 05:32:22");

    DateTime twotime = DateTime.Parse("2014-2-26 05:31:22");

    TimeSpan span = onetime .Subtract(twotime );