c#字符串到时间码

我想你只要在谷歌上搜索一下,就能自己找到答案。

未回答的问题是,例如,当小时为0时,您是否收到 00 在绳子里?还是空的?假设一切都如您所料,您可以插入字符串:

return $"{hour ?? "00"}:{minute ?? "00"}:{second ?? "00"}:{frames ?? "00"}";

评论中要求的简单(低效)C#5.0版本可以是:

return 
   (hour == null ? "00" : hour)
   + ":"
   + (minute == null ? "00" : minute)
   + ":"
   + (second == null ? "00" : second)
   + ":"
   + (frames == null ? "00" : frames);

using System;

namespace ConsoleApp26
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(ToTimeCode(null,null,"10",null));
            Console.WriteLine(ToTimeCode("1", "2", "3", "4"));

            Console.WriteLine(ToTimeCode2(null, null, "10", null));
            Console.WriteLine(ToTimeCode2("1", "2", "3", "4"));

            Console.ReadLine(); 
        }

        public static string ToTimeCode(string hours, string minutes, string seconds, string frames)
        {
            int.TryParse(hours, out int hoursInt);
            int.TryParse(minutes, out int minutesInt);
            int.TryParse(seconds, out int secondsInt);
            int.TryParse(frames, out int framesInt);
            var timespan = new TimeSpan(hoursInt, minutesInt, secondsInt, framesInt);
            return timespan.ToString("g");
        }

        public static string ToTimeCode2(string hours, string minutes, string seconds, string frames)
        {
            int.TryParse(hours, out int hoursInt);
            int.TryParse(minutes, out int minutesInt);
            int.TryParse(seconds, out int secondsInt);
            int.TryParse(frames, out int framesInt);
            var timespan = new TimeSpan(hoursInt, minutesInt, secondsInt, framesInt);
            return timespan.ToString(@"dd\.hh\:mm\:ss");
        }
    }
}

输出:

0:10:00
1:2:03:04
00.00:10:00
01.02:03:04

如果给字符串参数指定了错误的格式或null,则在输出时它将为0