Question

我正在尝试将CachedDataAnnotationsModelMetadataProvider扩展为不缓存自定义ValidationAttribute。我怎样才能实现这一目标？我试着查看aspnetwebstack，但它太复杂了，无法得到答案;我需要覆盖什么，作为受保护的覆盖

protected override CachedDataAnnotationsModelMetadata CreateMetadataFromPrototype(
            CachedDataAnnotationsModelMetadata prototype,
            Func<object> modelAccessor)

和

protected override CachedDataAnnotationsModelMetadata CreateMetadataPrototype(
            IEnumerable<Attribute> attributes,
            Type containerType,
            Type modelType,
            string propertyName)

CachedAssociatedMetadataProvider<TModelMetadata>方法

protected sealed override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName)

是密封的。有什么想法吗？

Answer 1

我的问题是由于构造函数中的属性初始化而未更新客户端验证。所以我将属性加载到了

public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
    var userSettings = ServiceLocator.Resolve<UserSettings>();
    if (userSettings != null)
    {
        // this was the required field to update
        this.StringLengthAttribute.MinimumLength = userSettings.MinRequiredPasswordLength;
    }

    yield return new ModelClientValidationStringLengthRule(this.ErrorMessage, this.StringLengthAttribute.MinimumLength, this.StringLengthAttribute.MaximumLength);
}

扩展CachedDataAnnotationsModelMetadataProvider以不缓存某些DataAnnotations

1 个答案: