Validator.TryValidateObject Not Validating RangeAttribute

Question

Given the following object,

public class Question
{
    [Required]
    public string QuestionText { get; set; }

    [Range(1, 5)]
    public int Difficulty          


        

Answer 1

Validator.TryValidatorObject(instance, validationContext, validationResults) calls Validator.TryValidateObject(instance, validationContext, validationResults, validateAllProperties) with validateAllProperties = false.

When validateAllProperties is false, only the RequiredAttribute will be validated.

Answer 2

Ah so it would seem I need to specify validateAllProperties = true

Validator.TryValidateObject(question, ctx, results, true);

Incidentally what was throwing me off was the fact I had an abstract base class with another property in it and without validateAllProperties the Validator will stop on the first error of ALL superclasses too. So you will get a validation error for each superclass (in my case 2)