时间戳的使用

 1 class DateTimeUtil
 2     {
 3         /// <summary>
 4         /// 起始时间
 5         /// </summary>
 6         private static  DateTime TimestampStartTime = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
 7 
 8 
 9         /// <summary>
10         /// 获取时间戳（10位）
11         /// </summary>
12         /// <param name="dateTime"></param>
13         /// <returns></returns>
14         public static  long ShortTimestamp(DateTime dateTime)
15         {
16             return (long)(dateTime.ToUniversalTime() - TimestampStartTime).TotalSeconds;
17         }
18 
19 
20         /// <summary>
21         /// 获取时间戳（13位）
22         /// </summary>
23         /// <param name="dateTime"></param>
24         /// <returns></returns>
25         public static long LongTimestamp(DateTime dateTime)
26         {
27             return (long)(dateTime.ToUniversalTime() - TimestampStartTime).TotalMilliseconds;
28         }
29     }