使用正则表达式C#验证密码 [英] Validating password using regex c#

问题描述

这必须很简单，我希望它以相同的方式工作，但这并不能帮助我.

This must be simple and I expect it working in the same way but it's not helping me out.

using System;
using System.Text.RegularExpressions;

在某些情况下，我需要密码验证正则表达式-

I am in a need of password validation regular expression with certain conditions where -

1)它必须至少包含一个数字

1) It must contain at least a number

2)一个大写字母

3)8个字符长.

public class Program
{
     public static bool IsValidPassword(string plainText) {
            Regex regex = new Regex(@"^(.{0,7}|[^0-9]*|[^A-Z])$");
            Match match = regex.Match(plainText);
            return match.Success;
}
    public static void Main()
    {
        Console.WriteLine(IsValidPassword("shing"));    //logs 'True' always
    }
}

我从此来源获取了正则表达式-

I've taken regex from this source- Password must be 8 characters including 1 uppercase letter, 1 special character, alphanumeric characters

问题是它总是返回"True"，而我发送给方法的字符串无效.

Issue is that it returns 'True' always and the string that I am sending to method is not valid.

如果我对正则表达式做错了事，请帮助我.

Help me if I am doing something wrong with the regex.

请在此处使用它- https://dotnetfiddle.net/lEFYGJ

推荐答案

我建议您创建单独的模式来验证密码:

I recommend you create separate patterns to validate the password:

var input = "P@ssw0rd";

var hasNumber = new Regex(@"[0-9]+");
var hasUpperChar = new Regex(@"[A-Z]+");
var hasMinimum8Chars = new Regex(@".{8,}");

var isValidated = hasNumber.IsMatch(input) && hasUpperChar.IsMatch(input) && hasMinimum8Chars.IsMatch(input);
Console.WriteLine(isValidated);

这篇关于使用正则表达式C#验证密码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！