I've asked this question on Stack Overflow, but haven't had much luck getting an answer so I thought I'd try here. How can I do a conditional comparison against an enum and trigger rules based upon it's value?
For example, let's say I'm trying to validate an object conditionally based upon the value of an enum, how can I do that?
Here's a sample call to validate the object.
MyObjectValidator validator = new MyObjectValidator(); ValidationResult results = validator.Validate(new MyObject());
Here's a sample of a class with an Enum Value.
public class MyObjectValidator : AbstractValidator<MyObject> { public MyObjectValidator() { RuleFor(x => x.anEnum).Equal(MyObject.MyEnum.First).SetValidator(new FirstValidator()); } } public class FirstValidator : AbstractValidator<MyObject> { public FirstValidator() { RuleFor(x => x.someDecimal).Equal(1).WithMessage("Decimal must equal 5 with anEnum set to First"); } } public class MyObject { public enum MyEnum : int { First = 0, Second = 1, Third = 2 } public decimal someDecimal { get; set; } public MyEnum anEnum { get; set; } public MyObject() { anEnum = MyEnum.First; someDecimal = 5; } }
This particular example throws the message: "The validator 'FirstValidator' cannot validate members of type 'MyEnum' - the types are not compatible."
After some editing, I came up with a wrapper to do what I'm hoping, but I'd prefer a more elegant solution. I replaced MyObjectValidator with
public MyObjectValidator() { RuleFor(x => x.anEnum).SetValidator(new ValidatorWrapper<MyObject>()).When(x => x.anEnum == MyObject.MyEnum.First); }
And added a validator wrapper
public class ValidatorWrapper<T> : PropertyValidator { public ValidatorWrapper() : base("Validator Message") { } protected override bool IsValid(PropertyValidatorContext context) { MyObject myObj = (MyObject)context.Instance; FirstValidator validator = new FirstValidator(); ValidationResult results = validator.Validate(myObj); } }
Is there a way to reference the inner context without having to provide the propertyvalidator wrapper such that I can conditionally validate a number of rules based upon an enum value?
Thanks