.Net Core=I want add personality rules for UserValidator

February 27, 2022

For Example;
I have password column in the table. AnyBody while enter system must write password. I want contain password minumum one character such as(/,-,?,+,!). I did such one code;

public UserValidator()
{
    RuleFor(p => p.Password).MinimumLength(10);
    RuleFor(p => p.Password).Must(MustBeCharacter);
}
private bool MustBeCharacter(string arg)
{
    return arg.Contains("."+","+"?"+"!"+"*"+"-"+"+");
}

I take a problem. system want all of them ("."+","+"?"+"!"+"*"+"-"+"+"). but I want minimum one more. How can I do this rule.
Thank you so much

>Solution :

In your current approach, you are concatenating all special characters into a single string and applying Contains() on it. That is the reason, the system expects all special chars should be part of your arg string.
You should define all special characters inside an array or a list, then use .Any() to check at least once special car should present in the string arg,
```
private bool MustBeCharacter(string arg)
{ 
    var specialChars = ".,?!*-+".ToCharArray();
    return specialChars.Any(x => arg.Contains(x));
}
```

Try online: .Net Fiddle