asp.net-mvc – ASP.NET MVC：使用没有IClientValidatable的属性

public class RequiredGuidAttribute : ValidationAttribute
{
    public override bool IsValid(object value)
    {
        Guid? guidValue = value as Guid?;

        if (guidValue == null)
            return false;

        return guidValue != Guid.Empty;
    }
}

[RequiredGuid(ErrorMessageResourceType = typeof(ClientOrderResources),ErrorMessageResourceName = "RequiredShippingMethod")]
    public Guid ShippingMethodId
    {
        get { return GetProperty(ShippingMethodIdProperty); }
        set { SetProperty(ShippingMethodIdProperty,value); }
    }

我们遇到了类似的问题.我们在创建帐户时使用了一个模型,该模型在其自定义属性上使用IClientValidatable.但是,我们创建了一个批处理帐户创建过程,该过程位于我们无法引用System.Web.Mvc的网站之外.因此,当我们调用Validator.TryValidateObject时,从IClientValidatable继承的任何自定义验证程序都只是跳过.以下是我们正在使用的未能在我们网站之外验证的内容：

public class AgeValidatorAttribute : ValidationAttribute,IClientValidatable
{
    public int AgeMin { get; set; }
    public int AgeMax { get; set; }

    public override bool IsValid(object value)
    {
        //run validation
    }
}

public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata,ControllerContext context)
    {
        var rule = new ModelClientValidationRule
        {
            ErrorMessage = ErrorMessageString,ValidationType = "agevalidator"
        };

        rule.ValidationParameters["agemin"] = AgeMin;
        rule.ValidationParameters["agemax"] = AgeMax;

        yield return rule;
    }

删除System.Web.Mvc要求我们也删除GetClientValidationRules和IClientValidatable引用.为了做到这一点并仍然进行客户端验证,我们必须创建一个新类：

public class AgeValidatorClientValidator : DataAnnotationsModelValidator<AgeValidatorAttribute>
{
    private readonly string _errorMessage;
    private readonly string _validationType;

    public AgeValidatorClientValidator(ModelMetadata metadata,ControllerContext context,AgeValidatorAttribute attribute)
        : base(metadata,context,attribute)
    {
        this._errorMessage = attribute.FormatErrorMessage(metadata.DisplayName);
        this._validationType = "agevalidator";
    }

    public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
    {
        var rule = new ModelClientValidationRule
        {
            ErrorMessage = this._errorMessage,ValidationType = this._validationType
        };

        rule.ValidationParameters["agemin"] = base.Attribute.AgeMin;
        rule.ValidationParameters["agemax"] = base.Attribute.AgeMax;

        yield return rule;
    }
}

正如您所看到的,它与以前完全相同,它只是使用DataAnnatotationsModelValidator而不是IClientValidatable完成的.我们需要做的另一个步骤是将DataAnnotationsModelValidator实际附加到atttribute,并且这是在Global.asax.cs Application_Start方法中完成的.

DataAnnotationsModelValidatorProvider.RegisterAdapter(
typeof(AgeValidatorAttribute),typeof(AgeValidatorClientValidator));

现在您可以像使用普通属性一样使用它：

[AgeValidator(AgeMax = 110,AgeMin = 18,ErrorMessage = "The member must be between 18 and 110 years old")]
public string DateOfBirth { get; set; }

我知道这个问题已经有一年了,但我昨天花了一整天,今天有一半时间试图解决这个问题.所以我希望这可以帮助那些遇到同样问题的人,如果OP尚未找到答案的话.

请注意,我在这篇文章中没有包含任何javascript,因为它不需要使用jQuery.validate对自定义验证规则的标准实现进行任何更改.