Mic*_*kus 17 .net c# timespan string-formatting
我有一个TimeSpan代表客户端连接到我的服务器的时间.我想将其显示TimeSpan给用户.但我不想过于冗长地显示那些信息(例如:2小时3分钟32.2345秒=太详细了!)
例如:如果连接时间是......
> 0 seconds and < 1 minute -----> 0 Seconds
> 1 minute and < 1 hour -----> 0 Minutes, 0 Seconds
> 1 hour and < 1 day -----> 0 Hours, 0 Minutes
> 1 day -----> 0 Days, 0 Hours
当然,在数字为1(例如:1秒,1分钟,1小时,1天)的情况下,我想使文本单数(例如:1秒,1分钟,1小时,1天) .
无论如何,如果没有一组巨大的if/else子句,可以轻松实现吗？这是我目前正在做的事情.
public string GetReadableTimeSpan(TimeSpan value)
{
string duration;
if (value.TotalMinutes < 1)
duration = value.Seconds + " Seconds";
else if (value.TotalHours < 1)
duration = value.Minutes + " Minutes, " + value.Seconds + " Seconds";
else if (value.TotalDays < 1)
duration = value.Hours + " Hours, " + value.Minutes + " Minutes";
else
duration = value.Days + " Days, " + value.Hours + " Hours";
if (duration.StartsWith("1 Seconds") || duration.EndsWith(" 1 Seconds"))
duration = duration.Replace("1 Seconds", "1 Second");
if (duration.StartsWith("1 Minutes") || duration.EndsWith(" 1 Minutes"))
duration = duration.Replace("1 Minutes", "1 Minute");
if (duration.StartsWith("1 Hours") || duration.EndsWith(" 1 Hours"))
duration = duration.Replace("1 Hours", "1 Hour");
if (duration.StartsWith("1 Days"))
duration = duration.Replace("1 Days", "1 Day");
return duration;
}
ren*_*ene 29
要摆脱复杂的if和switch结构,可以使用Dictionary查找基于TotalSeconds的正确格式字符串和CustomFormatter来相应地格式化提供的Timespan.
public string GetReadableTimespan(TimeSpan ts)
{
// formats and its cutoffs based on totalseconds
var cutoff = new SortedList<long, string> {
{59, "{3:S}" },
{60, "{2:M}" },
{60*60-1, "{2:M}, {3:S}"},
{60*60, "{1:H}"},
{24*60*60-1, "{1:H}, {2:M}"},
{24*60*60, "{0:D}"},
{Int64.MaxValue , "{0:D}, {1:H}"}
};
// find nearest best match
var find = cutoff.Keys.ToList()
.BinarySearch((long)ts.TotalSeconds);
// negative values indicate a nearest match
var near = find<0?Math.Abs(find)-1:find;
// use custom formatter to get the string
return String.Format(
new HMSFormatter(),
cutoff[cutoff.Keys[near]],
ts.Days,
ts.Hours,
ts.Minutes,
ts.Seconds);
}
// formatter for forms of
// seconds/hours/day
public class HMSFormatter:ICustomFormatter, IFormatProvider
{
// list of Formats, with a P customformat for pluralization
static Dictionary<string, string> timeformats = new Dictionary<string, string> {
{"S", "{0:P:Seconds:Second}"},
{"M", "{0:P:Minutes:Minute}"},
{"H","{0:P:Hours:Hour}"},
{"D", "{0:P:Days:Day}"}
};
public string Format(string format, object arg, IFormatProvider formatProvider)
{
return String.Format(new PluralFormatter(),timeformats[format], arg);
}
public object GetFormat(Type formatType)
{
return formatType == typeof(ICustomFormatter)?this:null;
}
}
// formats a numeric value based on a format P:Plural:Singular
public class PluralFormatter:ICustomFormatter, IFormatProvider
{
public string Format(string format, object arg, IFormatProvider formatProvider)
{
if (arg !=null)
{
var parts = format.Split(':'); // ["P", "Plural", "Singular"]
if (parts[0] == "P") // correct format?
{
// which index postion to use
int partIndex = (arg.ToString() == "1")?2:1;
// pick string (safe guard for array bounds) and format
return String.Format("{0} {1}", arg, (parts.Length>partIndex?parts[partIndex]:""));
}
}
return String.Format(format, arg);
}
public object GetFormat(Type formatType)
{
return formatType == typeof(ICustomFormatter)?this:null;
}
}
Dav*_*ner 11
恢复旧帖子，但是...
尝试使用Humanizer 库，它可以非常轻松地完成此操作：
TimeSpan.FromMilliseconds(1).Humanize() => "1 millisecond"
TimeSpan.FromMilliseconds(2).Humanize() => "2 milliseconds"
TimeSpan.FromDays(1).Humanize() => "1 day"
TimeSpan.FromDays(16).Humanize() => "2 weeks"
默认情况下，它会为您提供时间跨度的四舍五入的整数值。但您也可以要求更精确：
TimeSpan.FromDays(16).Humanize(2) => "2 weeks, 2 days"
为什么不简单这样呢？
public static class TimespanExtensions
{
public static string ToHumanReadableString (this TimeSpan t)
{
if (t.TotalSeconds <= 1) {
return $@"{t:s\.ff} seconds";
}
if (t.TotalMinutes <= 1) {
return $@"{t:%s} seconds";
}
if (t.TotalHours <= 1) {
return $@"{t:%m} minutes";
}
if (t.TotalDays <= 1) {
return $@"{t:%h} hours";
}
return $@"{t:%d} days";
}
}
如果您更喜欢两个时间单位(例如分钟加秒),那么添加起来非常简单.
小智 7
我根据 Bjorn 的回答来满足我的需求，想分享一下，以防其他人看到这个问题。可以节省他们的时间。接受的答案对我的需求来说有点重量级。
private static string FormatTimeSpan(TimeSpan timeSpan)
{
Func<Tuple<int,string>, string> tupleFormatter = t => $"{t.Item1} {t.Item2}{(t.Item1 == 1 ? string.Empty : "s")}";
var components = new List<Tuple<int, string>>
{
Tuple.Create((int) timeSpan.TotalDays, "day"),
Tuple.Create(timeSpan.Hours, "hour"),
Tuple.Create(timeSpan.Minutes, "minute"),
Tuple.Create(timeSpan.Seconds, "second"),
};
components.RemoveAll(i => i.Item1 == 0);
string extra = "";
if (components.Count > 1)
{
var finalComponent = components[components.Count - 1];
components.RemoveAt(components.Count - 1);
extra = $" and {tupleFormatter(finalComponent)}";
}
return $"{string.Join(", ", components.Select(tupleFormatter))}{extra}";
}
小智 5
public string ToHumanDuration(TimeSpan? duration, bool displaySign = true)
{
if (duration == null) return null;
var builder = new StringBuilder();
if (displaySign)
{
builder.Append(duration.Value.TotalMilliseconds < 0 ? "-" : "+");
}
duration = duration.Value.Duration();
if (duration.Value.Days > 0)
{
builder.Append($"{duration.Value.Days}d ");
}
if (duration.Value.Hours > 0)
{
builder.Append($"{duration.Value.Hours}h ");
}
if (duration.Value.Minutes > 0)
{
builder.Append($"{duration.Value.Minutes}m ");
}
if (duration.Value.TotalHours < 1)
{
if (duration.Value.Seconds > 0)
{
builder.Append(duration.Value.Seconds);
if (duration.Value.Milliseconds > 0)
{
builder.Append($".{duration.Value.Milliseconds.ToString().PadLeft(3, '0')}");
}
builder.Append("s ");
}
else
{
if (duration.Value.Milliseconds > 0)
{
builder.Append($"{duration.Value.Milliseconds}ms ");
}
}
}
if (builder.Length <= 1)
{
builder.Append(" <1ms ");
}
builder.Remove(builder.Length - 1, 1);
return builder.ToString();
}
来源： https: //github.com/HangfireIO/Hangfire/blob/master/src/Hangfire.Core/Dashboard/HtmlHelper.cs