Convert milliseconds to human readable time lapse

问题:

I would like to format some commands execution times in a human readable format, for example:

3 -> 3ms
1100 -> 1s 100ms
62000 -> 1m 2s
etc ..

Taking into account days, hours, minutes, seconds, ...

Is it possible using C#?

回答1:

You can use TimeSpan class, something like this:

TimeSpan t = TimeSpan.FromMilliseconds(ms);
string answer = string.Format("{0:D2}h:{1:D2}m:{2:D2}s:{3:D3}ms", 
                        t.Hours, 
                        t.Minutes, 
                        t.Seconds, 
                        t.Milliseconds);

It's quite similar as this thread I've just found:

What is the best way to convert seconds into (Hour:Minutes:Seconds:Milliseconds) time?

回答2:

I know this is old, but I wanted to answer with a great nuget package.

Install-Package Humanizer

https://www.nuget.org/packages/Humanizer

https://github.com/MehdiK/Humanizer

Example from their readme.md

TimeSpan.FromMilliseconds(1299630020).Humanize(4) => "2 weeks, 1 day, 1 hour, 30 seconds"

回答3:

What about this?

var ts = TimeSpan.FromMilliseconds(86300000 /*whatever */);
var parts = string
                .Format("{0:D2}d:{1:D2}h:{2:D2}m:{3:D2}s:{4:D3}ms",
                    ts.Days, ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds)
                .Split(':')
                .SkipWhile(s => Regex.Match(s, @"00\w").Success) // skip zero-valued components
                .ToArray();
var result = string.Join(" ", parts); // combine the result

Console.WriteLine(result);            // prints '23h 58m 20s 000ms'

回答4:

You could utilize the static TimeSpan.FromMilliseconds method as well as the resulting TimeSpan's Days, Hours, Minutes, Seconds and Milliseconds properties.

But I'm busy right now, so I'll leave the rest to you as an exercise.

回答5:

.NET 4 accepts format in TimeSpan.Tostring().

For other you can implement extension method like

    public static string Format(this TimeSpan obj)
    {
        StringBuilder sb = new StringBuilder();
        if (obj.Hours != 0)
        {
            sb.Append(obj.Hours);
            sb.Append(" "); 
            sb.Append("hours");
            sb.Append(" ");
        }
        if (obj.Minutes != 0 || sb.Length != 0)
        {
            sb.Append(obj.Minutes);
            sb.Append(" "); 
            sb.Append("minutes");
            sb.Append(" ");
        }
        if (obj.Seconds != 0 || sb.Length != 0)
        {
            sb.Append(obj.Seconds);
            sb.Append(" "); 
            sb.Append("seconds");
            sb.Append(" ");
        }
        if (obj.Milliseconds != 0 || sb.Length != 0)
        {
            sb.Append(obj.Milliseconds);
            sb.Append(" "); 
            sb.Append("Milliseconds");
            sb.Append(" ");
        }
        if (sb.Length == 0)
        {
            sb.Append(0);
            sb.Append(" "); 
            sb.Append("Milliseconds");
        }
        return sb.ToString();
    }

and call as

foreach (TimeSpan span in spans)
{
    MessageBox.Show(string.Format("{0}",  span.Format()));
}

回答6:

public static string ReadableTime(int milliseconds)
{
    var parts = new List<string>();
    Action<int, string> add = (val, unit) => { if (val > 0) parts.Add(val+unit); };
    var t = TimeSpan.FromMilliseconds(milliseconds);

    add(t.Days, "d");
    add(t.Hours, "h");
    add(t.Minutes, "m");
    add(t.Seconds, "s");
    add(t.Milliseconds, "ms");

    return string.Join(" ", parts);
}

回答7:

Maybe something like this?

DateTime.Now.ToString("%d 'd' %h 'h' %m 'm' %s 'seconds' %ms 'ms'")

回答8:

For example to get 00:01:35.0090000 as 0 hours, 1 minutes, 35 seconds and 9 milliseconds you can use this:

Console.WriteLine("Time elapsed:" +TimeSpan.FromMilliseconds(numberOfMilliseconds).ToString());

Your output:

Time elapsed: 00:01:35.0090000

回答9:

This probably has a slightly different output than requested, but the result is human readable - and it can be adapted to fit many other use cases.

private static List<double> _intervals = new List<double>
{
    1.0 / 1000 / 1000,
    1.0 / 1000,
    1,
    1000,
    60 * 1000,
    60 * 60 * 1000
};
private static List<string> _units = new List<string>
{
    "ns",
    "µs",
    "ms",
    "s",
    "min",
    "h"
};

public string FormatUnits(double milliseconds, string format = "#.#")
{
    var interval = _intervals.Last(i=>i<=milliseconds);
    var index = _intervals.IndexOf(interval);

    return string.Concat((milliseconds / interval).ToString(format) , " " , _units[index]);
}

Example calls...

Console.WriteLine(FormatUnits(1));
Console.WriteLine(FormatUnits(20));
Console.WriteLine(FormatUnits(300));
Console.WriteLine(FormatUnits(4000));
Console.WriteLine(FormatUnits(50000));
Console.WriteLine(FormatUnits(600000));
Console.WriteLine(FormatUnits(7000000));
Console.WriteLine(FormatUnits(80000000));

...and results:

1000 µs
20 ms
300 ms
4 s
50 s
10 min
1.9 h
22.2 h

回答10:

Well i normally hate writing if statements but some times what you really have is a nail and need a hammer.

string time;
if (elapsedTime.TotalMinutes > 2)
    time = string.Format("{0:n2} minutes", elapsedTime.TotalMinutes);
else if (elapsedTime.TotalSeconds > 15)
    time = string.Format("{0:n2} seconds", elapsedTime.TotalSeconds);
else
    time = string.Format("{0:n0}ms", elapsedTime.TotalMilliseconds);