'Add error message without using WithMessage() method in FluentValidation

I have a question and would be grateful if anyone can help me. I am validating an object with "FluentValidation" in an ASP.NET project, and I would like to know if there is a way to add an error message in "ValidationResult" without using the WithMessage () method. I am needing to add an error message based on a condition that is not related to the properties of the validated class. I thank the attention.

c++sharp.netfluentvalidation


Solution 1:[1]

When you write a custom validator for instance.

see FluentValidation documentation. You can see here a screen from Visual Studio enter image description here where an ErrorMessage-string is added. Here's some actual code for such a rule

RuleFor(customerCreateCommand => customerCreateCommand.Dto.Addresses)
           .Custom((addresses, context) =>
           {
               bool includesBillingAddress = false;
               foreach (AddressDto address in addresses)
               {
                   if (address.AdressTypeId == Commons.Enums.AddressType.Billing)
                   {
                       includesBillingAddress = true;
                   }
               }
               if (includesBillingAddress == false) { context.AddFailure("A customer profile needs a billing address"); }
           });

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Source: Stack Overflow

Solution Source
Solution 1 qqtf

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