asp.net-mvc-3 – ASP .Net MVC 3不引人注目的客户端验证

@Html.TextBoxFor(model => Model.CCPayment.CardNumber,new { @class = "textInput validateCreditCard",maxLength = "20" })

$(document).ready(function () {
      jQuery.validator.unobtrusive.adapters.add('validateCreditCard',{},function (value,element) {
        alert('foo');
    });
});

<div class="ctrlHolder">
                <label>
                    <em>*</em>
                    Card Number:
                </label>
                @Html.TextBoxFor(model => Model.CCPayment.CardNumber,maxLength = "20" })

                <p class="field-validation-valid formHint" data-valmsg-for="CCPayment.CardNumber"></p>
             </div>

以下是您可以继续的方法。首先，您需要编写自定义验证器属性，以确保在服务器端执行验证。你可以使用这个 blog post描述的那个：

public class CreditCardAttribute : ValidationAttribute,IClientValidatable
{
    private CardType _cardTypes;
    public CardType AcceptedCardTypes
    {
        get { return _cardTypes; }
        set { _cardTypes = value; }
    }

    public CreditCardAttribute()
    {
        _cardTypes = CardType.All;
    }

    public CreditCardAttribute(CardType AcceptedCardTypes)
    {
        _cardTypes = AcceptedCardTypes;
    }

    public override bool IsValid(object value)
    {
        var number = Convert.ToString(value);

        if (String.IsNullOrEmpty(number))
            return true;

        return IsValidType(number,_cardTypes) && IsValidNumber(number);
    }

    public override string FormatErrorMessage(string name)
    {
        return "The " + name + " field contains an invalid credit card number.";
    }

    public enum CardType
    {
        Unknown = 1,Visa = 2,MasterCard = 4,Amex = 8,Diners = 16,All = CardType.Visa | CardType.MasterCard | CardType.Amex | CardType.Diners,AllOrUnknown = CardType.Unknown | CardType.Visa | CardType.MasterCard | CardType.Amex | CardType.Diners
    }

    private bool IsValidType(string cardNumber,CardType cardType)
    {
        // Visa
        if (Regex.IsMatch(cardNumber,"^(4)")
            && ((cardType & CardType.Visa) != 0))
            return cardNumber.Length == 13 || cardNumber.Length == 16;

        // MasterCard
        if (Regex.IsMatch(cardNumber,"^(51|52|53|54|55)")
            && ((cardType & CardType.MasterCard) != 0))
            return cardNumber.Length == 16;

        // Amex
        if (Regex.IsMatch(cardNumber,"^(34|37)")
            && ((cardType & CardType.Amex) != 0))
            return cardNumber.Length == 15;

        // Diners
        if (Regex.IsMatch(cardNumber,"^(300|301|302|303|304|305|36|38)")
            && ((cardType & CardType.Diners) != 0))
            return cardNumber.Length == 14;

        //Unknown
        if ((cardType & CardType.Unknown) != 0)
            return true;

        return false;
    }

    private bool IsValidNumber(string number)
    {
        int[] DELTAS = new int[] { 0,1,2,3,4,-4,-3,-2,-1,0 };
        int checksum = 0;
        char[] chars = number.ToCharArray();
        for (int i = chars.Length - 1; i > -1; i--)
        {
            int j = ((int)chars[i]) - 48;
            checksum += j;
            if (((i - chars.Length) % 2) == 0)
                checksum += DELTAS[j];
        }

        return ((checksum % 10) == 0);
    }

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata,ControllerContext context)
    {
        yield return new ModelClientValidationRule
        {
            ErrorMessage = this.ErrorMessage,ValidationType = "creditcard"
        };
    }
}

请注意，我修改了它，使其实现了IClientValidatable接口，并添加了GetClientValidationRules方法，该方法只是使用相同的错误消息进行客户端验证作为服务器端，并为该验证器提供了一个唯一的名称，该名称将由jquery unobtrusive适配器使用。现在剩下的是用这个属性来装饰你的模型属性：

[CreditCard(ErrorMessage = "Please enter a valid credit card number")]
[Required]
public string CardNumber { get; set; }

在你看来：

<script src="@Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.js")" type="text/javascript"></script>
<script type="text/javascript">
    $(function () {
        jQuery.validator.unobtrusive.adapters.addBool('creditcard');
    });
</script>

@using (Html.BeginForm())
{
    @Html.TextBoxFor(x => x.CardNumber)
    @Html.ValidationMessageFor(x => x.CardNumber)
    <input type="submit" value="OK" />
}