C# 正则表达式转义某些字符

Question

如何使用 C# 正则表达式转义字符串中的某些字符？

This is a test for % and ' thing? -> This is a test for \% and \' thing?

Answer 1

resultString = Regex.Replace(subjectString, 
    @"(?<!      # Match a position before which there is no
     (?<!\\)    # odd number of backlashes
     \\         # (it's odd if there is one backslash,
     (?:\\\\)*  # followed by an even number of backslashes)
    )
    (?=[%'])    # and which is followed by a % or a '", 
    @"\", RegexOptions.IgnorePatternWhitespace);

但是，如果您试图保护自己免受恶意 SQL 查询的侵害，则正则表达式不是正确的方法。