正则表达式验证与流畅验证 ASP.NET Core WebApi

Question

I'm working with WebApi project and have used fluent validation for validating the request.

Userbase Dto.

public class UserBaseDto
{    
    [JsonProperty("email")]
    public string Email { get; set; }

    [JsonProperty("countryId")]
    public int CountryId { get; set; }

    [JsonProperty("phoneNumber")]
    public string PhoneNumber { get; set; }
}

UserRegister Dto.

public class RegisterDto : UserBaseDto
{
}

UserBaseDtoValidator.

public class UserBaseDtoValidator : AbstractValidator<UserBaseDto>
{
    public UserBaseDtoValidator()
    {            
        RuleFor(x => x.Email)
            .EmailAddress()
            .WithMessage("Please provide valid email");

        RuleFor(x => x.PhoneNumber)
            .MatchPhoneNumberRule()
            .WithMessage("Please provide valid phone number");
    }
}

MatchPhoneNumberRule is a custom validator

public static class CustomValidators
{
    public static IRuleBuilderOptions<T, string> MatchPhoneNumberRule<T>(this IRuleBuilder<T, string> ruleBuilder)
    {
        return ruleBuilder.SetValidator(new RegularExpressionValidator(@"((?:[0-9]\-?){6,14}[0-9]$)|((?:[0-9]\x20?){6,14}[0-9]$)"));
    }
}

Regex is accepting 6 to 14 digit phone number.

Here, I want to check validation for registration request. So, I have done something like:

public class RegisterDtoValidator : AbstractValidator<RegisterDto>
{
    public RegisterDtoValidator()
    {
        RuleFor(x => x).SetValidator(new UserBaseDtoValidator());
    }       
}

All other validations working fine. However, regex is working for lower limit but when I pass more than 14 digit, validation not getting triggered.

Same expression working with RegularExpressionAttribute

Answer 1

(?:[0-9]\\-?){6,14}[0-9]$ means 6–14 digits plus one digit at the end of the string.

Just add the ^ sign at the start of pattern. ^(?:[0-9]\\-?){6,14}[0-9]$ means exactly 6–14 digits plus one digit in the entire string.

While $ matches with the end of string, [0-9]$ matches with any string that ends with a digit. ^ matches with the start of string, so ^[0-9] means any string that starts with a digit. ^[0-9$ matches with any string that contains exactly one digit.

Your full pattern should look like:

@"^((?:[0-9]\-?){6,14}[0-9])|((?:[0-9]\x20?){6,14}[0-9])$"

Answer 2

尝试使用以下模式：

(^(?:[0-9]\-?){5,13}[0-9]$)|(^(?:[0-9]\x20?){5,13}[0-9]$)