使用interval_spec您可以創建使用這裏顯示的格式的時間跨度解析PHP interval_spec dateinterval到.NET TimeSpan對象在PHP

Question

： http://php.net/manual/en/dateinterval.construct.php

如。 $interval = new DateInterval('P2Y4DT6H8M');

我有這種格式（{"dateOffset:"P1D",...} etc ...）來到我的c＃應用程序在json對象，我想知道是否有一種簡單的方法來解析這個.NET時間跨度對象？

Answer 1

滾滾呢？所以，我寫我自己笨重的方法，但感覺應該是比這更簡單：

public TimeSpan FromPhpDateInterval(string phpDateInterval) 
{ 
    // Method to parse php's interval_spec (An interval specification) 
    // The format starts with the letter P, for "period." Each duration period is represented by an integer value followed by a period designator. If the duration 
    // contains time elements, that portion of the specification is preceded by the letter T. Here are some simple examples. Two days is P2D. Two seconds is PT2S. 
    // Six years and five minutes is P6YT5M. See: http://php.net/manual/en/dateinterval.construct.php. 
    DateTime now, then; now = then = DateTime.UtcNow; 

    Regex regex = new Regex(@"\d+[A-Z]"); 

    string p = null; 
    string t = null; 

    if (phpDateInterval.StartsWith("P") && phpDateInterval.Contains("T")) 
    { 
     string[] split = phpDateInterval.Split('T'); 
     p = split[0].Substring(1); 
     t = split[1]; 
    } 
    else if (phpDateInterval.StartsWith("T")) 
    { 
     t = phpDateInterval.Substring(1); 
    } 
    else if (phpDateInterval.StartsWith("P")) 
    { 
     p = phpDateInterval.Substring(1); 
    } 
    else throw new Exception("Invalid interval_spec string format"); 

    if (!string.IsNullOrEmpty(p)) 
    { 
     MatchCollection matches = regex.Matches(p); 

     for (int i = 0; i < matches.Count; i++) 
     { 
      string val = matches[i].Value; 

      switch (val[val.Length - 1]) 
      { 
       case 'Y': // Years 
        then = then.AddYears(int.Parse(val.TrimEnd('Y'))); 
        break; 
       case 'M': // Months 
        then = then.AddMonths(int.Parse(val.TrimEnd('M'))); 
        break; 
       case 'D': // Days 
        then = then.AddDays(int.Parse(val.TrimEnd('D'))); 
        break; 
       case 'W': // Weeks. These get converted into days, so can not be combined with D in php (makes no difference to us). 
        then = then.AddDays(int.Parse(val.TrimEnd('W')) * 7); 
        break; 
      } 
     } 
    } 

    if (!string.IsNullOrEmpty(t)) 
    { 
     MatchCollection matches = regex.Matches(t); 

     for (int i = 0; i < matches.Count; i++) 
     { 
      string val = matches[i].Value; 

      switch (val[val.Length - 1]) 
      { 
       case 'H': // Hours 
        then = then.AddHours(int.Parse(val.TrimEnd('H'))); 
        break; 
       case 'M': // Minutes 
        then = then.AddMinutes(int.Parse(val.TrimEnd('M'))); 
        break; 
       case 'S': // Seconds 
        then = then.AddSeconds(int.Parse(val.TrimEnd('S'))); 
        break; 
      } 
     } 
    } 
    return then.Subtract(now); 
} 

Answer 2

您可以使用XmlConvert轉換爲.NET時間跨度

TimeSpan myTimeSpan = XmlConvert.ToTimeSpan("P2Y4DT6H8M");