c# - 正则表达式选择子字符串的模式

Question

在 Regex C# 中查找和选择字符串的一部分的语法是什么？

字符串可能是:

string tdInnerHtml = "<strong> You gained  230 Points </strong> 
                      there is going to be more text and some html code part of this       
                      string <a href=http://google.com>Google it here </a>";

// I want to extract 230 from this string using Regx. 
// The digits (230) vary for each tdInnerHtml. 
// So code would be to look for digits, followed by space, ending with Points

Answer 1

如果空格和 </strong>标签是一致的，您可以使用以下内容来获得匹配，并且可以使用以下字符串:“品脱在 230-240 点之间，您获得了 230 点”

        var match = Regex.Match(tdInnerHtml, @"(?<pts>\d+) Points ?</strong>");
        if (match.Success) {
            int points = Convert.ToInt32(match.Groups["pts"].Value);
            Console.WriteLine("Points: {0}", points);
        }