一开始它至少接受 3 个字母，然后在 .net 中接受数字和特殊字符

Question

Good afternoon colleagues I have the following regular expression in .net My purpose is that at the beginning it does not contain space, also accept at least 3 letters and hence numbers and special characters, but I can not do it, any recommendation

Regex regex = new Regex(@"^([a-zA-ZäÄëËïÏöÖüÜáéíóúáéíóúÁÉÍÓÚÂÊÎÔÛâêîôûàèìòùÀÈÌÒÙ]{3})+?^[_@./#&+-]+?[a-zA-ZäÄëËïÏöÖüÜáéíóúáéíóúÁÉÍÓÚÂÊÎÔÛâêîôûàèìòùÀÈÌÒÙ0-9\s].+\w$");
Match match = regex.Match(accountName);
return match.Success;

Answer 1

If(!accountName[0]==String.Empty && accountName.Length>3)
return true;