概率密码的正则表达式 [英] regular expression for password in probabilities

问题描述

hi

我要求密码采用四个像这样的三个选项中的任何一个....
密码必须使用以下四种字符类型中的至少三种的组合:
I.Atleast 1个大写字母(A – Z)
II.小写字母(a – z)
III.Atleast 1号(0 – 9)
IV.至少1个非字母数字符号(例如@"$％£！")

因此，有人可以在asp.net中以正则表达式验证器提供的正则表达式帮助我，还是可以通过其他任何方式对其进行验证?

hi

I have a requirement for the password to take any of the three options from four like.......
password must use a combination of at least three of the following four character types:
I.Atleast 1 upper case letters (A – Z)
II.Lower case letters (a – z)
III.Atleast 1 number (0 – 9)
IV.Atleast 1 non-alphanumeric symbol (e.g. @ ‘$%£!’)

So can anyone help me with the regular expression to be given in regular expression validator in asp.net or any other way where i can validate it?

推荐答案

％£！ ')

因此，有人可以在asp.net中以正则表达式验证器提供的正则表达式来帮助我，还是可以通过其他任何方式对其进行验证?

%£!’)

So can anyone help me with the regular expression to be given in regular expression validator in asp.net or any other way where i can validate it?

使用正则表达式是一种不好的方法-这不是一个字符串匹配操作，它是一个字符计数操作，而正则表达式根本不擅长此操作.
用代码执行:遍历每个字符并计算其组.您可以在服务器端作为回发测试的一部分，也可以在客户端作为验证程序的一部分-完全由您决定.

A regex is a bad way to do this - this isn''t a string matching operation, it''s a character counting operation, and regexes are not good at that at all.
Do it in code: loop through each character and count it''s groups. You can do this either server side as part of the postback testing or client side as part of the validator - it''s up to you.

似乎它应该在服务器端实现，因此请在您的Button单击上调用此方法:

Hi,
it seems that it should implement on server side so call this method on your Button click:

 bool ValidatePassword()
{
    string pass = txtpass.Text;

    bool result = false;
    bool isDigit = false;
    bool isLetter=false;
    bool isLowerChar = false;
    bool isUpperChar = false;
    bool isNonAlpha = false;

    foreach (char c in pass)
    {           
        if (char.IsDigit(c))
            isDigit = true;
        if (char.IsLetter(c))
        {
            isLetter=true;
            if (char.IsLower(c))
                isLowerChar = true;
            if (char.IsUpper(c))
                isUpperChar = true;
        } 
        Match m = Regex.Match(c.ToString(), @"\W|_");
        if (m.Success)
            isNonAlpha = true;
    }

    if (isDigit && isLetter && isLowerChar && isUpperChar && isNonAlpha)
        result = true;

    return result;
}

希望对您有帮助.

hope this will help you.

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