改进这段代码--关于时间比较
//这段代码是获取每个数据的创建时间，再与当前时间做比较，从而把页面改成比较友好的时间显示如：昨天 12:00:00或前4小时，这段代码我总觉得比较乱，希望高手能帮我理理，让它变得更轻巧些
public static string GetCompareDate(DateTime strDate)//strDate是数据的创建时间
{
//刚刚，5分钟前，10分钟前，半小时前,1小时前，2小时前，3小时前,4小时前
//5小时前，昨天'几点'，前天'几点',再超过就显示完整时间
DateTime now = DateTime.Now; //获取当前时间
string showTime = "";
if (strDate.ToString("yyyy-MM-dd") == "0001-01-01" || String.IsNullOrEmpty(strDate.ToString("yyyy-MM-dd")))
{
showTime = "还没人发表过!";
}
else
{
#region 过去
if (strDate.Date.CompareTo(now.Date) < 0)
{
//同年
if (strDate.Year.CompareTo(now.Year) == 0)
{
//同月
if (strDate.Month.CompareTo(now.Month) == 0)
{
//前天
if (strDate.AddDays(2).CompareTo(now.Date) == 0)
{
showTime = "前天 " + strDate.ToString("HH:mm:ss");
}
//早于前天发布的
else if (strDate.AddDays(2).CompareTo(now.Date) < 0)
{
showTime = strDate.ToString("yyyy-MM-dd HH:mm:ss");
}
//昨天
else
{
showTime = "昨天 " + strDate.ToString("HH:mm:ss");
}
}
else
{
showTime = strDate.ToString("yyyy-MM-dd HH:mm:ss");
}
}
else
{
showTime = strDate.ToString("yyyy-MM-dd HH:mm:ss");
}
}
#endregion
#region 今天
else if (strDate.Date.CompareTo(now.Date) == 0)
{
DateTime nowHour = DateTime.Parse(now.ToString("HH:mm:ss"));
//5小时前
if (strDate.AddHours(5).CompareTo(nowHour) == 0)
{
showTime = "5小时前";
}
else if (strDate.AddHours(5).CompareTo(nowHour) < 0)
{
showTime = "今天 " + strDate.ToString("HH:mm:ss");
}
else
{
//4小时前
if (strDate.AddHours(5).CompareTo(nowHour) < 0 || strDate.AddHours(4).CompareTo(nowHour) <=0)
{
showTime = "4小时前";
}
else
{
//3小时前
if (strDate.AddHours(4).CompareTo(nowHour) < 0 || strDate.AddHours(3).CompareTo(nowHour) <= 0)
{
showTime = "3小时前";
}
else
{
//2小时前
if (strDate.AddHours(3).CompareTo(nowHour) < 0 || strDate.AddHours(2).CompareTo(nowHour) <= 0)
{
showTime = "2小时前";
}
else
{
//1小时前
if (strDate.AddHours(2).CompareTo(nowHour) < 0 || strDate.AddHours(1).CompareTo(nowHour) <= 0)
{
showTime = "1小时前";
}
else
{
if (strDate.AddMinutes(10).CompareTo(nowHour) == 0 || strDate.AddMinutes(10).CompareTo(nowHour) <= 0)
{
showTime = "10分钟前";
}
else if (strDate.AddMinutes(5).CompareTo(nowHour) == 0 || strDate.AddMinutes(5).CompareTo(nowHour) < 0)
{
showTime = "5分钟前";
}
else if (strDate.AddMinutes(1).CompareTo(nowHour) == 0 || strDate.AddMinutes(1).CompareTo(nowHour) < 0 || DateTime.Parse(strDate.ToString("HH:mm:ss")).CompareTo(nowHour) == 0)
{
showTime = "刚刚";
}
}
}
}
}
}
}
#endregion
}
return showTime;
}
[解决办法]
TimeSpan timeInterval = now - strDate;
剩下的这么多 if 分支改成 switch
就不上代码了
