Fluent Validation for if string not null then check is valid email

Question

I am using fluent validation library for my asp.net mvc5 project . my requirement is if user input email then if validate valid email address otherwise its not validate it is valid email address or not

Answer 1

You can simply do as follows with Fluent Validation method chaining:

RuleFor(s => s.Email).NotEmpty().WithMessage("Email address is required")
                     .EmailAddress().WithMessage("Your email address is not valid");

If your email field is not required then validate as follows:

RuleFor(s => s.Email).EmailAddress().WithMessage("Your email address is not valid");

try this, If your email field is not required then validate Email Address:

RuleFor(e => e.Email).EmailAddress().When(x => !string.IsNullOrEmpty(x.Email)).WithMessage("Your email address is not valid");