解析正則表達式問題季節/情節模式

Question

爲什麼這個正則表達式不正確地解析字符串「Season 02 Episode 01」？

例如，這是不匹配：

var fileName = "Its Always Sunny in Philadelphia Season 02 Episode 01 - Charlie Gets Crippled.avi" 

// Regex explanation: 
// Starts with "S" and can contain more letters, can continue with space, then contains two numbers. 
// Then starts with "E" again and can contain more letters, can continue with space, then contains two numbers. 
var pattern = @"S\w?\s?(\d\d)\s?E\w?\s?(\d\d)"; 
var regex = new Regex(pattern, RegexOptions.IgnoreCase); 
var match = regex.Match(fileName); 

Answer 1

使用*代替?

?爲0或1的時間。 *爲0或更多次。

Answer 2

開始以 「S」，並且可以包含多個字母[...]

你的意思是+，不?。

var pattern = @"S\w+\s+(\d+)\s+E\w+\s+(\d+)"; 

請注意，這個正則表達式非常不確定。注意誤報。我建議讓表達更具體。