问题
I'm using the System.ComponentModel.DataAnnotations.CustomValidationAttribute to validate one of my POCO classes and when I try to unit test it, it's not even calling the validation method.
public class Foo
{
[Required]
public string SomethingRequired { get; set }
[CustomValidation(typeof(Foo), "ValidateBar")]
public int? Bar { get; set; }
public string Fark { get; set; }
public static ValidationResult ValidateBar(int? v, ValidationContext context) {
var foo = context.ObjectInstance as Foo;
if(!v.HasValue && String.IsNullOrWhiteSpace(foo.Fark)) {
return new ValidationResult("Either Bar or Fark must have something in them.");
}
return ValidationResult.Success;
}
}
but when I try to validate it:
var foo = new Foo {
SomethingRequired = "okay"
};
var validationContext = new ValidationContext(foo, null, null);
var validationResults = new List<ValidationResult>();
bool isvalid = Validator.TryValidateObject(foo, validationContext, validationResults);
Assert.IsFalse(isvalid); //FAIL!!! It's valid when it shouldn't be!
It never even steps into the custom validation method. What gives?
回答1:
Try using the overload that takes a bool that specifies if all properties should be validated. Pass true for the last parameter.
public static bool TryValidateObject(
Object instance,
ValidationContext validationContext,
ICollection<ValidationResult> validationResults,
bool validateAllProperties
)
If you pass false or omit the validateAllProperties, only the RequiredAttribute will be checked. Here is the MSDN documentation.
来源:https://stackoverflow.com/questions/10165143/customvalidationattribute-specifed-method-not-being-called