漯河北京网站建设公司,廊坊有限公司,提供东莞网站制作公司,工程从立项到竣工流程咨询区 Jeff Atwood#xff1a;给定一个 DataTime 值#xff0c;如何计算如下时间#xff1f;比如说#xff1a;2 小时前#xff1f;3 天前#xff1f;1 个月前#xff1f;回答区 neuracnu#xff1a;我在 DateTime 类上做了一个扩展方法#xff0c;你可以给它传递未来… 咨询区 Jeff Atwood给定一个 DataTime 值如何计算如下时间比如说2 小时前3 天前1 个月前回答区 neuracnu我在 DateTime 类上做了一个扩展方法你可以给它传递未来或者过去的时间还可以给他传一个 approximation 选项来指定更精细的信息描述参考如下代码
using System.Text;/// summary
/// Compares a supplied date to the current date and generates a friendly English
/// comparison (5 days ago, 5 days from now)
/// /summary
/// param namedateThe date to convert/param
/// param nameapproximateWhen off, calculate timespan down to the second.
/// When on, approximate to the largest round unit of time./param
/// returns/returns
public static string ToRelativeDateString(this DateTime value, bool approximate)
{StringBuilder sb new StringBuilder();string suffix (value DateTime.Now) ? from now : ago;TimeSpan timeSpan new TimeSpan(Math.Abs(DateTime.Now.Subtract(value).Ticks));if (timeSpan.Days 0){sb.AppendFormat({0} {1}, timeSpan.Days,(timeSpan.Days 1) ? days : day);if (approximate) return sb.ToString() suffix;}if (timeSpan.Hours 0){sb.AppendFormat({0}{1} {2}, (sb.Length 0) ? , : string.Empty,timeSpan.Hours, (timeSpan.Hours 1) ? hours : hour);if (approximate) return sb.ToString() suffix;}if (timeSpan.Minutes 0){sb.AppendFormat({0}{1} {2}, (sb.Length 0) ? , : string.Empty, timeSpan.Minutes, (timeSpan.Minutes 1) ? minutes : minute);if (approximate) return sb.ToString() suffix;}if (timeSpan.Seconds 0){sb.AppendFormat({0}{1} {2}, (sb.Length 0) ? , : string.Empty, timeSpan.Seconds, (timeSpan.Seconds 1) ? seconds : second);if (approximate) return sb.ToString() suffix;}if (sb.Length 0) return right now;sb.Append(suffix);return sb.ToString();
}neuracnugithub 上有一个非常流行的 DateTime 帮助类可以非常精细化的满足你的要求参见网址https://github.com/FluentDateTime/FluentDateTime 比如下面这些例子
var dateTime1 2.Hours().Ago();
var dateTime2 3.Days().Ago();
var dateTime3 1.Months().Ago();
var dateTime4 5.Hours().FromNow();
var dateTime5 2.Weeks().FromNow();
var dateTime6 40.Seconds().FromNow();leppie纯手工封装用 SortedList 预先做一个映射应该还是能够满足你的需求参考如下代码。
static readonly SortedListdouble, FuncTimeSpan, string offsets new SortedListdouble, FuncTimeSpan, string
{{ 0.75, _ less than a minute},{ 1.5, _ about a minute},{ 45, x ${x.TotalMinutes:F0} minutes},{ 90, x about an hour},{ 1440, x $about {x.TotalHours:F0} hours},{ 2880, x a day},{ 43200, x ${x.TotalDays:F0} days},{ 86400, x about a month},{ 525600, x ${x.TotalDays / 30:F0} months},{ 1051200, x about a year},{ double.MaxValue, x ${x.TotalDays / 365:F0} years}
};public static string ToRelativeDate(this DateTime input)
{TimeSpan x DateTime.Now - input;string Suffix x.TotalMinutes 0 ? ago : from now;x new TimeSpan(Math.Abs(x.Ticks));return offsets.First(n x.TotalMinutes n.Key).Value(x) Suffix;
}点评区 试用了下 FluentDateTime果然????????强烈推荐大家使用。
