C#中DateTime的各种操作 日期戳

DatetimeUtil

/// <summary>
/// DateTime转换为10位时间戳（单位：秒）
/// </summary>
/// <param name="dateTime"> DateTime</param>
/// <returns>10位时间戳（单位：秒）</returns>
public static long DateTimeToTimeStamp(DateTime dateTime)
{
    return (long)(dateTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds;
}
/// <summary>
/// DateTime转换为13位时间戳（单位：毫秒）
/// </summary>
/// <param name="dateTime"> DateTime</param>
/// <returns>13位时间戳（单位：毫秒）</returns>
public static long DateTimeToLongTimeStamp(DateTime dateTime)
{
    return (long)(dateTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;
}
/// <summary>
/// 10位时间戳（单位：秒）转换为DateTime
/// </summary>
/// <param name="timeStamp">10位时间戳（单位：秒）</param>
/// <returns>DateTime</returns>
public static DateTime TimeStampToDateTime(long timeStamp)
{
    return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(timeStamp).ToLocalTime();
}
/// <summary>
/// 13位时间戳（单位：毫秒）转换为DateTime
/// </summary>
/// <param name="longTimeStamp">13位时间戳（单位：毫秒）</param>
/// <returns>DateTime</returns>
public static DateTime LongTimeStampToDateTime(long longTimeStamp)
{
    return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddMilliseconds(longTimeStamp).ToLocalTime();
}

 

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/// <summary>         /// 本时区日期时间转时间戳         /// </summary>         /// <param name="datetime"></param>         /// <returns>long=Int64</returns>         public static long DateTimeToTimestamp(DateTime datetime)         {             DateTime dd = new DateTime(1970, 1, 1, 0, 0, 0, 0);             DateTime timeUTC = DateTime.SpecifyKind(datetime, DateTimeKind.Utc);//本地时间转成UTC时间             TimeSpan ts = (timeUTC - dd);             return (Int64)ts.TotalMilliseconds;//精确到毫秒         }         /// <summary>         /// 时间戳转本时区日期时间         /// </summary>         /// <param name="timeStamp"></param>         /// <returns></returns>         public static DateTime TimestampToDateTime(string timeStamp)         {             DateTime dd = DateTime.SpecifyKind(new DateTime(1970, 1, 1, 0, 0, 0, 0), DateTimeKind.Local);             long longTimeStamp = long.Parse(timeStamp + "0000");             TimeSpan ts = new TimeSpan(longTimeStamp);             return dd.Add(ts);         }

C#时间戳与日期互转

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/// <summary>          /// 时间戳转为C#格式时间          /// </summary>          /// <param name="timeStamp">Unix时间戳格式</param>          /// <returns>C#格式时间</returns>          public static DateTime GetTime(string timeStamp)         {             DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));             long lTime = long.Parse(timeStamp + "0000000");             TimeSpan toNow = new TimeSpan(lTime);             return dtStart.Add(toNow);         }           /// <summary>          /// DateTime时间格式转换为Unix时间戳格式          /// </summary>          /// <param name="time"> DateTime时间格式</param>          /// <returns>Unix时间戳格式</returns>          public static int ConvertDateTimeInt(System.DateTime time)         {             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));             return (int)(time - startTime).TotalSeconds;         }

　　

使用C#把发表的时间改为几个月,几天前,几小时前,几分钟前,或几秒前

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/// <summary>         /// 使用C#把发表的时间改为几个月,几天前,几小时前,几分钟前,或几秒前         /// </summary>         /// <param name="dt"></param>         /// <returns></returns>         public static string DateStringFromNow(DateTime dt)         {             TimeSpan span = DateTime.Now - dt;             if (span.TotalDays > 60)             {                 return dt.ToShortDateString();             }             else             {                 if (span.TotalDays > 30)                 {                     return                     "1个月前";                 }                 else                 {                     if (span.TotalDays > 14)                     {                         return                         "2周前";                     }                     else                     {                         if (span.TotalDays > 7)                         {                             return                             "1周前";                         }                         else                         {                             if (span.TotalDays > 1)                             {                                 return                                 string.Format("{0}天前", (int)Math.Floor(span.TotalDays));                             }                             else                             {                                 if (span.TotalHours > 1)                                 {                                     return                                     string.Format("{0}小时前", (int)Math.Floor(span.TotalHours));                                 }                                 else                                 {                                     if (span.TotalMinutes > 1)                                     {                                         return                                         string.Format("{0}分钟前", (int)Math.Floor(span.TotalMinutes));                                     }                                     else                                     {                                         if (span.TotalSeconds >= 1)                                         {                                             return                                             string.Format("{0}秒前", (int)Math.Floor(span.TotalSeconds));                                         }                                         else                                         {                                             return                                             "1秒前";                                         }                                     }                                 }                             }                         }                     }                 }             }         }

　　

C#中使用TimeSpan计算两个时间的差值

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/// <summary>        /// C#中使用TimeSpan计算两个时间的差值        /// 可以反加两个日期之间任何一个时间单位。        /// </summary>        /// <param name="DateTime1"></param>        /// <param name="DateTime2"></param>        /// <returns></returns>        public static string DateDiff(DateTime DateTime1, DateTime DateTime2)        {            string dateDiff = null;            TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);            TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);            TimeSpan ts = ts1.Subtract(ts2).Duration();            dateDiff = ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒";            return dateDiff;        }

　　

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/*1.DateTime值类型代表了一个从公元0001年1月1日0点0分0秒到公元9999年12月31日23点59分59秒之间的具体日期时刻。因此，你可以用DateTime值类型来描述任何在想象范围之内的时间。一个DateTime值代表了一个具体的时刻         2.TimeSpan值包含了许多属性与方法，用于访问或处理一个TimeSpan值         下面的列表涵盖了其中的一部分：         Add：与另一个TimeSpan值相加。         Days:返回用天数计算的TimeSpan值。         Duration:获取TimeSpan的绝对值。         Hours:返回用小时计算的TimeSpan值         Milliseconds:返回用毫秒计算的TimeSpan值。         Minutes:返回用分钟计算的TimeSpan值。         Negate:返回当前实例的相反数。         Seconds:返回用秒计算的TimeSpan值。         Subtract:从中减去另一个TimeSpan值。         Ticks:返回TimeSpan值的tick数。         TotalDays:返回TimeSpan值表示的天数。         TotalHours:返回TimeSpan值表示的小时数。         TotalMilliseconds:返回TimeSpan值表示的毫秒数。         TotalMinutes:返回TimeSpan值表示的分钟数。         TotalSeconds:返回TimeSpan值表示的秒数。         */

　　来源：http://www.cnblogs.com/summers/p/3225716.html