c# .contains()使用正则表达式

本文关键字：正则表达式 contains | 更新日期: 2023-09-27 18:15:58

我目前正在尝试执行数组搜索，如果数组包含字符串匹配特定字符，将返回true。

例如:

我有一个包含这三个值的数组

"Atlanta Hawks are great this year!",
"Atlanta Braves are okay this year!",
"Atlanta Falcons are great this year!"

我要做的是返回true，如果数组包含至少一个值匹配下面的指针…

"Atlanta* *are great this year!"

(决定在本例中使用星号作为通配符)

在这种情况下将返回true。

但是对于这个数组

"Atlanta Hawks are bad this year!",
"Detroit Tigers are okay this year!",
"New England Patriots are good this year!"

它将返回false。

目前我正在做的是…(和不工作)

 if (result.Properties["memberOf"].Matches("Atlanta* *are great this year!"))
                {
                    return true;
                }

我的问题是，是否有任何通配符可以与。contains()方法一起使用，或者在c#中PHP中是否有类似的preg_grep()方法?

提前感谢您的帮助。

c# .contains()使用正则表达式

我建议将通配符 (*和?)转换为正则表达式模式，然后使用Linq来查找是否有与正则表达式匹配的Any项:

  string[] data = new string[] {
    "Atlanta Hawks are great this year!",
    "Atlanta Braves are okay this year!",
    "Atlanta Falcons are great this year!"
  };
  string wildCard = "Atlanta* *are great this year!";
  // * - match any symbol any times
  // ? - match any symbol just once
  string pattern = Regex.Escape(wildCard).Replace(@"'*", ".*").Replace(@"'?", ".");
  bool result = data.Any(item => Regex.IsMatch(item, pattern));

你可能想把实现包装成一个方法:

  private static bool ContainsWildCard(IEnumerable<String> data, String wildCard) {  
    string pattern = Regex.Escape(wildCard).Replace(@"'*", ".*").Replace(@"'?", ".");
    return data.Any(item => Regex.IsMatch(item, pattern));
  }
  ...
  String[] test = new String[] {
    "Atlanta Hawks are bad this year!",
    "Detroit Tigers are okay this year!",
    "New England Patriots are good this year!"
  }
  bool result = ContainsWildCard(test, "Atlanta* *are great this year!");

你可以这样做:

string[] input = {"Atlanta Hawks are great this year!", "Atlanta Braves are okay this year!", "Atlanta Falcons are great this year!"};
var output = false;
Regex reg = new Regex("Atlanta (.*) are great this year!");
foreach (var item in input)
{        
    Match match = reg.Match(item);
    if (match.Success)
    {
        output = true;
        break;
    }
}

手头没有编译器，但应该是这样的:

public boolean checkMyArray(string[] theStringArray) {
    string pattern = "Atlanta (.*) are (great|okay) this year!";
    foreach (string s in theStringArray) {
       if(System.Text.RegularExpressions.Regex.IsMatch(s, pattern))
          return true;
    }
    return false;
}
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