使用正则表达式分配多个变量

I have a xml duration in the format of "0H0M0.25S", where H, M, S stands for hour, month, second. Now I wish to parse this string and assign it to integer hour, minute, and double second. i.e.

我的xml持续时间格式为“0H0M0.25S”，其中H，M，S代表小时，月，秒。现在我希望解析这个字符串并将其分配给整数小时，分钟和双秒。即

string s="0H0M0.25S";//input
int hour, minute;double second;//variable to assign

is there a way to achieve it using regular expression, which can assign all this variable in one go?

有没有办法使用正则表达式来实现它，它可以一次性分配所有这些变量？

2 个解决方案

#1

Try this:

尝试这个：

var result = Regex.Match(s, @"(\d*)H(\d*)M(\d*.\d*)");
hour = int.Parse(result.Groups[1].Value);
minute = int.Parse(result.Groups[2].Value);
second = double.Parse(result.Groups[3].Value);

You might need to compensate for culture while parsing double.

在解析double时，您可能需要补偿文化。

#2

Or you can ditch Regex altogether and work with DateTime:

或者你可以完全抛弃Regex并使用DateTime：

    string datePattern = @"H\Hm\Ms.ff\S";
    var date = new DateTime();

    if (DateTime.TryParseExact("0H0M0.25S", datePattern, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out date))
    {
        // Everything you need is in 'date' in just one go :)
        int hour = date.Hour;
        int minute = date.Minute;
        double second = (double)date.Second + ((double)date.Millisecond / 1000);
    }
    else 
    {
        // Catch invalid datetime string here
    }

#1