需要.NET正则表达式转义哪些字符？ [英] What characters need to be escaped in .NET Regex?

问题描述

在一个.NET <一个href="http://msdn.microsoft.com/en-us/library/system.text.regularex$p$pssions.regex.aspx"><$c$c>Regex被字面上的使用模式，特殊字符必须以转义是什么？

In a .NET Regex pattern, what special characters need to be escaped in order to be used literally?

推荐答案

我不知道完整的字符集 - 但我不会依赖于知识，无论如何，我不会把它变成code。相反，我会用<一个href="http://msdn.microsoft.com/en-us/library/system.text.regularex$p$pssions.regex.escape.aspx"><$c$c>Regex.Escape每当我想要一些文字文本，我是不知道：

I don't know the complete set of characters - but I wouldn't rely on the knowledge anyway, and I wouldn't put it into code. Instead, I would use Regex.Escape whenever I wanted some literal text that I wasn't sure about:

// Don't actually do this to check containment... it's just a little example.
public bool RegexContains(string haystack, string needle)
{
    Regex regex = new Regex("^.*" + Regex.Escape(needle) + ".*$");
    return regex.IsMatch(haystack);
}

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