Question

在c#中，如何实现计算DateTime a与DateTime b两个日期间相距的天数？

Answer 1

DateTime time1 =new DateTime(1982,4,24,14,23,06);
DateTime time2 =new DateTime(1982,1,21,8,16,32);

TimeSpan ts= time2.Subtract(time1);
string timespan = "相差:"
+ts.Days.ToString()+"天"
+ts.Hours.ToString()+"小时"
+ts.Minutes.ToString()+"分钟"
+ts.Seconds.ToString()+"秒";

Answer 2

使用 Timespan
DateTime dt1 = DateTime.Now;
DateTime dt2 = DateTime.Now.AddDays(-7);
TimeSpan ts = dt1 - dt2;

int days = ts.Days; //dt1和dt2相差多少天

Answer 3

DateTime dt1 = DateTime.Now;
DateTime dt2 = DateTime.Now.AddDays(1);
TimeSpan ts = dt2 - dt1;

Answer 4

用DateTime a-DateTime b其他的都会自动转换