Question 86279 in ASP.NET Question posted in
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FluentValidation for names – Asp.net

I have the following class

public class User 
{
  string firstName;
  string lastName;
}

And for that one I want to use a regex with fluent validation to be accepted just letters and whitespaces. As a regex might be a good example but I didn’t find any implementation

And I created the following validator

    public class UserValidator:AbstractValidator<User>
{
    public UserValidator()
    {
        RuleFor(x => x.Id)
            .NotEmpty()
            .NotNull();
        RuleFor(x => x.Name)
            .NotEmpty().WithMessage("Please ensure that to set a value for {PropertyName}")
            .Must(BeValidName).WithMessage("Please ensure that to set a valid value for {PropertyName}")
            .Length(3, 30);

        private bool BeValidName(string name)
    {
        return name.All(Char.IsLetter);
    }

}

But I m going to search something better 😀 Do you guys have any idea ? Thanks!

Tags:

2

Answers


  1. 0

    You can use regex validators

    RuleFor(x => x.Name).Matches("some regex here");
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  2. 0

    This is an example of accepting only letters and spaces for the Name field using FluentValidation and Regex.

    public class User
{
    public string Id;
    public string Name;
}

public class UserValidator : AbstractValidator<User>
{
    public UserValidator()
    {
        RuleFor(x => x.Id)
            .NotEmpty()
            .NotNull();
        RuleFor(x => x.Name)
            .NotEmpty()
            .Matches(@"^[A-Za-zs]*$").WithMessage("'{PropertyName}' should only contain letters.")
            .Length(3, 30);
    }
}

    Validation Output:

    enter image description here

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