asp.net-mvc-3 - 检查集合长度 - 不显眼的验证 - asp.net mvc 3、4

Question

我有自定义的 ValidationAttribute 和实现的 IClientValidatable。它使用（Html.BeginForm（））效果很好，但使用（Ajax.BeginForm（））不起作用。

客户端代码：

   $(function() {
        jQuery.validator.unobtrusive.adapters.addBool('collectionLength');
    });

服务器代码：

/// <summary>
/// Require a minimum length, and optionally a maximum length, for any IEnumerable
/// </summary>
sealed public class CollectionMinimumLengthValidationAttribute : ValidationAttribute, IClientValidatable
{
    const string errorMessage = "{0} must contain at least {1} item(s).";
    const string errorMessageWithMax = "{0} must contain between {1} and {2} item(s).";
    int minLength;
    int? maxLength;

    public CollectionMinimumLengthValidationAttribute(int min)
    {
        minLength = min;
        maxLength = null;
    }

    public CollectionMinimumLengthValidationAttribute(int min, int max)
    {
        minLength = min;
        maxLength = max;
    }

    //Override default FormatErrorMessage Method  
    public override string FormatErrorMessage(string name)
    {
        if (maxLength != null)
        {
            return string.Format(errorMessageWithMax, name, minLength, maxLength.Value);
        }
        else
        {
            return string.Format(errorMessage, name, minLength);
        }
    }

    public override bool IsValid(object value)
    {
        IEnumerable<object> list = value as IEnumerable<object>;

        if (list != null && list.Count() >= minLength && (maxLength == null || list.Count() <= maxLength))
        {
            return true;
        }
        else
        {
            return false;
        }
    }

     public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        var rule = new ModelClientValidationRule { ValidationType = " CollectionMinimumLengthValidation", ErrorMessage = FormatErrorMessage("Error") };
        rule.ValidationParameters.Add("min", minLength);
        rule.ValidationParameters.Add("max", maxLength);

        yield return rule;
    }
}

CollectionMinimumLengthValidation.js 文件：

jQuery.validator.addMethod("CollectionMinimumLengthValidation", function (value, element, param) {
    debugger;
    return false;
});