Validation rule for Allow Empty in EITHER ... OR ... case using fluent validation

Question

How to write a Validation rule for Allow Empty in EITHER Email OR in PhoneNumber

RuleFor(x => x.Email).NotEmpty().WithMessage(localizationService.GetResource("ContactUs.Email.Required"));
RuleFor(x => x.PhoneNumber).NotEmpty().WithMessage(localizationService.GetResource("Products.MakeAnOffer.PhoneNumber"));

So only Email or PhoneNumber can be empty, not both together? — Roman Koliada, Nov 03 '17 at 15:25
Possible duplicate of [FluentValidation: Check if one of two fields are empty](https://stackoverflow.com/questions/21115179/fluentvalidation-check-if-one-of-two-fields-are-empty) — Divyang Desai, Nov 03 '17 at 16:59

score 5 · Accepted Answer · answered Nov 03 '17 at 15:29

Try this:

    RuleFor(x => x.Email)
        .NotEmpty()
        .When(x => string.IsNullOrEmpty(x.PhoneNumber))//will run only if PhoneNumber is empty
        .WithMessage(localizationService.GetResource("ContactUs.Email.Required"));

    RuleFor(x => x.PhoneNumber)
        .NotEmpty().When(x => string.IsNullOrEmpty(x.Email))//will run only if Email is empty
        .WithMessage(localizationService.GetResource("Products.MakeAnOffer.PhoneNumber"));

Validation rule for Allow Empty in EITHER ... OR ... case using fluent validation

1 Answers1