How can I implement Fluent Validation in my MVC app?

How can I implement Fluent Validation in my MVC app?

To implement Fluent Validation in your MVC app, first, install the FluentValidation NuGet package. Then, create a validator class for your model.

What does the validator class look like?

The validator class should inherit from AbstractValidator<T>. For example, if you have a User model, you can create a UserValidator class that defines rules for properties like Name and Email.

Can you show me an example of validation rules?

Sure! In your UserValidator class, you might have rules like: RuleFor(user => user.Name).NotEmpty().WithMessage("Name is required."); and RuleFor(user => user.Email).EmailAddress().WithMessage("Invalid email format.");.

How do I integrate this with my controller?

In your controller, you can use the validator by injecting it and calling Validate on your model before saving it. If validation fails, you can return the errors to the view.