通过上面的了解，我们可以认为格林威治时间就是时间协调时间（GMT=UTC），格林威治时间和UTC时间均用秒数来计算的。
/// <summary>
/// 获取时间戳
/// </summary>
/// <returns></returns>
public static string GetTimeStamp(System.DateTime time)
{
long ts = ConvertDateTimeToInt(time);
return ts.ToString();
}
/// <summary>
/// 将c# DateTime时间格式转换为Unix时间戳格式
/// </summary>
/// <param name="time">时间</param>
/// <returns>long</returns>
public static long ConvertDateTimeToInt(System.DateTime time)
{
System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
long t = (time.Ticks - startTime.Ticks) / 10000; //除10000调整为13位
return t;
}
/// <summary>
/// 时间戳转为C#格式时间
/// </summary>
/// <param name=”timeStamp”></param>
/// <returns></returns>
private DateTime ConvertStringToDateTime(string timeStamp)
{
DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lTime = long.Parse(timeStamp + "0000");
TimeSpan toNow = new TimeSpan(lTime);
return dtStart.Add(toNow);
}
/// <summary>
/// 时间戳
/// </summary>
public class TimeHelp
{
/// <summary>
/// 获取时间戳
/// </summary>
/// <returns></returns>
public static string GetTimeStamp(System.DateTime time,int length=13)
{
long ts = ConvertDateTimeToInt(time);
return ts.ToString().Substring(0,length);
}
/// <summary>
/// 将c# DateTime时间格式转换为Unix时间戳格式
/// </summary>
/// <param name="time">时间</param>
/// <returns>long</returns>
public static long ConvertDateTimeToInt(System.DateTime time)
{
System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
long t = (time.Ticks - startTime.Ticks) / 10000; //除10000调整为13位
return t;
}
/// <summary>
/// 时间戳转为C#格式时间
/// </summary>
/// <param name=”timeStamp”></param>
/// <returns></returns>
public static DateTime ConvertStringToDateTime(string timeStamp)
{
DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lTime = long.Parse(timeStamp + "0000");
TimeSpan toNow = new TimeSpan(lTime);
return dtStart.Add(toNow);
}
/// <summary>
/// 时间戳转为C#格式时间10位
/// </summary>
/// <param name="timeStamp">Unix时间戳格式</param>
/// <returns>C#格式时间</returns>
public static DateTime GetDateTimeFrom1970Ticks(long curSeconds)
{
DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
return dtStart.AddSeconds(curSeconds);
}
/// <summary>
/// 验证时间戳
/// </summary>
/// <param name="time"></param>
/// <param name="interval">差值（分钟）</param>
/// <returns></returns>
public static bool IsTime(long time, double interval)
{
DateTime dt = GetDateTimeFrom1970Ticks(time);
//取现在时间
DateTime dt1 = DateTime.Now.AddMinutes(interval);
DateTime dt2 = DateTime.Now.AddMinutes(interval * -1);
if (dt > dt2 && dt < dt1)
{
return true;
}
else {
return false;
}
}
/// <summary>
/// 判断时间戳是否正确（验证前8位）
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public static bool IsTime(string time)
{
string str = GetTimeStamp(DateTime.Now,8);
if (str.Equals(time))
{
return true;
}
else {
return false;
}
}
}
