Question

如何在Fluent Model Validator中访问属性值？下面是 ModelA的验证器类。 ModelA有一个名为isValid的bool属性。如何在此类中访问布尔值？。

 public class ModelAValidator :  
 AbstractValidator<ModelA>

{

    public ModelAValidator()

    {
       var regexPatterns = new RegExPatterns();
       RuleFor(x => x.FirstName)
          .RequiredForBeneficiaryWhen(x => x.IsBeneficiaryValid)
          .WithLocalizedMessage(ResourceAreas.Messages.Message_PersonalDetails_1001_firstname)


     RuleFor(x => x.FirstLastName).
            RequiredForBeneficiaryWhen(x => x.IsBeneficiaryValid)
            .WithLocalizedMessage(ResourceAreas.Messages.Message_PersonalDetails_1001_firstname)

    }

}

ExtensionMethod -

public static IRuleBuilderOptions<T, TProperty>   
        RequiredForBeneficiaryWhen<T, TProperty>(
        this IRuleBuilder<T, TProperty> ruleBuilder,     
        Expression<Func<T, bool>> conditionalProperty)
{

        var validationrule = new UnobtrusiveValidationRule()
        {
            ValidationType = "mvfbenefreq"
        };

        return
            ruleBuilder.SetValidator(new  
           BeneficiaryRequiredValidation<T>(conditionalProperty, 
        false, validationrule));
}

属性验证器 -

public class BeneficiaryRequiredValidation<T> : PropertyValidator, IClientValidatable
{
    public object CompareTo { get; private set; }
    public UnobtrusiveValidationRule ClientValidationRule { get; set; }
    private readonly Expression<Func<T, bool>> _conditonalExpression;
    private readonly bool _conditionalValue;


    public BeneficiaryRequiredValidation(Expression<Func<T, bool>> compareExpression, bool conditionalValue , UnobtrusiveValidationRule clientvalidationrule)
        : base(FluentValidation.Resources.Messages.lessthan_error)
    {
        ClientValidationRule = clientvalidationrule;
        _conditonalExpression = compareExpression;
        _conditionalValue = conditionalValue;
    }

    protected override bool IsValid(PropertyValidatorContext context)
    {
        return true;

    }

    [ExcludeFromCodeCoverage]
    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        var formatter = new MessageFormatter().AppendPropertyName(metadata.PropertyName);
        var message = formatter.BuildMessage(ErrorMessageSource.GetString());

        var rule = new ModelClientValidationRule
        {
            ErrorMessage = message,
            ValidationType = ClientValidationRule.ValidationType
        };

        if (ClientValidationRule.Parameterlist != null)
        {
            foreach (var entry in ClientValidationRule.Parameterlist)
            {
                rule.ValidationParameters.Add(entry.Key, entry.Value);
            }
        }
        yield return rule;
    }
}

谢谢

Answer 1

假设RequiredForBeneficiaryWhen看起来像这样：

private bool RequiredForBeneficiaryWhen(string requiredStr, bool isValid)
{
    //Require value specified if isValid is true
    if (isValid)
        return !string.IsNullOrEmpty(requiredStr);

    //It isn't valid
    return false;
}

然后你可以使用Must重写规则：

RuleFor(x => x.FirstName)
        .Must((model, firstName) => RequiredForBeneficiaryWhen(firstName, model.IsBeneficiaryValid))
        .WithLocalizedMessage(ResourceAreas.Messages.Message_PersonalDetails_1001_firstname)

如何在Fluent ModelValidator中访问属性值

1 个答案: