.net 时间戳互相转换（精确到毫秒）

 1 /// <summary>
 2         /// Unix时间戳转换为DateTime
 3         /// </summary>
 4         private DateTime ConvertToDateTime(string timestamp)
 5         {
 6             System.DateTime time = System.DateTime.MinValue;
 7             //精确到毫秒
 8             //时间戳转成时间
 9             DateTime start = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
10             try
11             {
12                 time = timestamp.Length == 10 ? start.AddSeconds(long.Parse(timestamp)) : start.AddMilliseconds(long.Parse(timestamp));
13             }
14             catch (Exception ex)
15             {
16                 return start;//转换失败
17             }
18             return time;
19         }
20 
21         /// <summary>
22         /// DateTime转换为Unix时间戳
23         /// </summary>
24         /// <param name="time"></param>
25         /// <returns></returns>
26         private string ConvertTimestamp(DateTime time)
27         {
28             double intResult = 0;
29             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
30             intResult = (time - startTime).TotalMilliseconds;
31             return Math.Round(intResult,0).ToString();
32         }