DateTimeHelper.cs
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using System;
using System.Collections.Generic;
using System.Text;
namespace Yi.Framework.Core.Helper
{
public class DateTimeHelper
{
/// <summary>
///
/// </summary>
/// <param name="dateTime"></param>
/// <returns></returns>
public static DateTime GetBeginTime(DateTime? dateTime, int days = 0)
{
if (dateTime == DateTime.MinValue || dateTime == null)
{
return DateTime.Now.AddDays(days);
}
return dateTime ?? DateTime.Now;
}
#region 时间戳转换
/// <summary>
/// 时间戳转本地时间-时间戳精确到秒
/// </summary>
public static DateTime ToLocalTimeDateBySeconds(long unix)
{
var dto = DateTimeOffset.FromUnixTimeSeconds(unix);
return dto.ToLocalTime().DateTime;
}
/// <summary>
/// 时间转时间戳Unix-时间戳精确到秒
/// </summary>
public static long ToUnixTimestampBySeconds(DateTime dt)
{
DateTimeOffset dto = new DateTimeOffset(dt);
return dto.ToUnixTimeSeconds();
}
/// <summary>
/// 时间戳转本地时间-时间戳精确到毫秒
/// </summary>
public static DateTime ToLocalTimeDateByMilliseconds(long unix)
{
var dto = DateTimeOffset.FromUnixTimeMilliseconds(unix);
return dto.ToLocalTime().DateTime;
}
/// <summary>
/// 时间转时间戳Unix-时间戳精确到毫秒
/// </summary>
public static long ToUnixTimestampByMilliseconds(DateTime dt)
{
DateTimeOffset dto = new DateTimeOffset(dt);
return dto.ToUnixTimeMilliseconds();
}
#endregion
#region 毫秒转天时分秒
/// <summary>
/// 毫秒转天时分秒
/// </summary>
/// <param name="ms"></param>
/// <returns></returns>
public static string FormatTime(long ms)
{
int ss = 1000;
int mi = ss * 60;
int hh = mi * 60;
int dd = hh * 24;
long day = ms / dd;
long hour = (ms - day * dd) / hh;
long minute = (ms - day * dd - hour * hh) / mi;
long second = (ms - day * dd - hour * hh - minute * mi) / ss;
long milliSecond = ms - day * dd - hour * hh - minute * mi - second * ss;
string sDay = day < 10 ? "0" + day : "" + day; //天
string sHour = hour < 10 ? "0" + hour : "" + hour;//小时
string sMinute = minute < 10 ? "0" + minute : "" + minute;//分钟
string sSecond = second < 10 ? "0" + second : "" + second;//秒
string sMilliSecond = milliSecond < 10 ? "0" + milliSecond : "" + milliSecond;//毫秒
sMilliSecond = milliSecond < 100 ? "0" + sMilliSecond : "" + sMilliSecond;
return string.Format("{0} 天 {1} 小时 {2} 分 {3} 秒", sDay, sHour, sMinute, sSecond);
}
#endregion
#region 获取unix时间戳
/// <summary>
/// 获取unix时间戳
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static long GetUnixTimeStamp(DateTime dt)
{
long unixTime = ((DateTimeOffset)dt).ToUnixTimeMilliseconds();
return unixTime;
}
#endregion
#region 获取日期天的最小时间
public static DateTime GetDayMinDate(DateTime dt)
{
DateTime min = new DateTime(dt.Year, dt.Month, dt.Day, 0, 0, 0);
return min;
}
#endregion
#region 获取日期天的最大时间
public static DateTime GetDayMaxDate(DateTime dt)
{
DateTime max = new DateTime(dt.Year, dt.Month, dt.Day, 23, 59, 59);
return max;
}
#endregion
#region 获取日期天的最大时间
public static string FormatDateTime(DateTime? dt)
{
if (dt != null)
{
if (dt.Value.Year == DateTime.Now.Year)
{
return dt.Value.ToString("MM-dd HH:mm");
}
else
{
return dt.Value.ToString("yyyy-MM-dd HH:mm");
}
}
return string.Empty;
}
#endregion
}
}