1 public class TimeTool
2 {
3 //根据出生年月计算 整数天
4 private static int GetAgeByBirthdate(DateTime birthdate)
5 {
6 DateTime now = DateTime.Now;
7 int age = now.Year - birthdate.Year;
8 if (now.Month < birthdate.Month || (now.Month == birthdate.Month && now.Day < birthdate.Day))
9 {
10 age--;
11 }
12 return age < 0 ? 0 : age;
13 }
//根据出生年月计算 X岁或X月X天或X天
14 public static string GetAgeByBirthday(DateTime birthday)
15 {
16 var currenttime = DateTime.Now;
17 var diffTime = currenttime - birthday;
18 if (diffTime.TotalDays >= 365)
19 {
20 //年龄计算
21 return GetAgeByBirthdate(birthday).ToString() + "岁";
22 }
23 else
24 {
25 //个月计算
26 var diffmonth = currenttime.Month - birthday.Month;
27 var day = currenttime.Day - birthday.Day;
28 if (day < 0)
29 {
30 diffmonth--;
31 }
32 if (diffmonth > 0)
33 {
34 DateTime newbirthday = birthday.AddMonths(diffmonth);
35 day = (int)((currenttime - newbirthday).TotalDays);
36 return diffmonth.ToString() + "个月" + (day == 0 ? "" : day.ToString() + "天");
37 }
38 else
39 {
40 //直接计算天
41 return ((int)(diffTime.TotalDays)).ToString() + "天";
42 }
43 }
44
45 }
46 }
