正则表达式简单问题:要求字符中至少有一个数字、一个大写字母和一个小写字母的正则表达式怎么写？

Question

参考：http://expert.csdn.net/Expert/FAQ/FAQ_Index.asp?id=104752

Answer 1

there is probably a better way, but try to permute \d, [A-Z], and [a-z]:\d.*[a-z].*[A-Z]|\d.*[A-Z].*[a-z]|[a-z].*\d.*[A-Z]|[a-z].*[A-Z].*\d|[A-Z].*[a-z].*\d||[A-Z].*\d.*[a-z]or(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*for examplestring[] slist = {"a","9","Z","a9","9Z","aA","a9Z","a**Z*9","[',9/?Z%&*z]"};
  Regex re = new Regex(@"(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*");
  foreach (string s in slist)
  {
Console.WriteLine("{0} matches? {1}", s, re.IsMatch(s));
  }

Answer 2

http://www.aspcool.com/lanmu/browse1.asp?id=961&bbsuser=csharp