使用^ [A-Za-z] [A-Za-z0-9！@＃$％^＆*] * $ reg验证密码如何在c＃代码后面应用长度

Question

Using password regex validation:

^[A-Za-z ][A-Za-z0-9!@#$%^&* ]*$

How I apply length into that in c# code behind server?

Answer 1

You can try like this:

^[A-Za-z ][A-Za-z0-9!@#$%^&* ]{8,15}*$

This {8,15} means that the length could be between 8 to 15

Answer 2

Well this might be what you are expecting

public static bool IsValidPassword (string input)
        {
Match match = Regex.Match(input, @"(?=^.{8,12}$)((?=.*\d)(?=.*[A-Z])(?=.*[a-z])|(?=.*\d)(?=.*[^A-Za-z0-9])(?=.*[a-z])|(?=.*[^A-Za-z0-9])(?=.*[A-Z])(?=.*[a-z])|(?=.*\d)(?=.*[A-Z])(?=.*[^A-Za-z0-9]))^.*");

            if (match.Success && match.Index == 0 && match.Length == input.Length)
                return true;
            else
                return false;

        }