DateHelper（辅助类）

public static class DateHelper
{
public static string GetDayOfWeekName(DateTime datetime)
{
string weekstr = datetime.DayOfWeek.ToString();
switch (weekstr)
{
case "Monday":
weekstr = "周一";
break;
case "Tuesday":
weekstr = "周二";
break;
case "Wednesday":
weekstr = "周三";
break;
case "Thursday":
weekstr = "周四";
break;
case "Friday":
weekstr = "周五";
break;
case "Saturday":
case "Sunday":
weekstr = "周末";
break;
}
return weekstr;
}
public static int ConvertDateTimeInt(string timeStr)
{
DateTime time = Convert.ToDateTime(timeStr);
System.DateTime startTime = TimeZoneInfo.ConvertTimeToUtc(new System.DateTime(1970, 1, 1));//.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
return (int)(time - startTime).TotalSeconds;
}

public static string GetNewsTime(DateTime dtTime)
{
var time = DateTime.Now;
string releaseTime;
var seconds = time.Subtract(dtTime).TotalMinutes;
if (seconds >= 0 && seconds < 1)
{
releaseTime = "刚刚";
}
else if (seconds >= 1 && seconds < 60)
{
releaseTime = (int)seconds + "分钟前";
}
else if (seconds >= 60 && seconds < 60 * 24)
{
releaseTime = time.Subtract(dtTime).Hours + "小时前";
}
else if (seconds >= 60 * 24 && seconds < 7 * 24 * 60)
{
releaseTime = time.Subtract(dtTime).Days + "天前";
}
else if (seconds >= 7 * 24 * 60 && seconds < 30 * 24 * 60)
{
releaseTime = (int)(time.Subtract(dtTime).Days / 7) + "周前";
}
else if (seconds >= 30 * 24 * 60 && seconds < 12 * 30 * 24 * 60)
{
releaseTime = (int)(time.Subtract(dtTime).Days / 30) + "月前";
}
else if (seconds >= 12 * 30 * 24 * 60)
{
releaseTime = releaseTime = dtTime.ToString("yyyy-MM-dd");
}
else
{
releaseTime = dtTime.ToString("yyyy-MM-dd");
}
return releaseTime;
}
}