c# - ASP.NET MVC3 - 自定义验证属性 -> 客户端损坏

Question

我也在尝试使用客户端验证来实现自定义验证属性。

我的属性看起来像:

public class FileSize : ValidationAttribute, IClientValidatable
{
    private readonly int _size;

    public FileSize(int size)
    {
        ErrorMessage = "Invalid size.";
        _size = size;
    }

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

        rule.ValidationParameters["size"] = _size;

        yield return rule;
    }

    public override bool IsValid(object value)
    {
        return ((HttpPostedFileBase) value).ContentLength < _size;
    }
}

脚本在我看来是这样的:

<script src="@Url.Content("~/Scripts/jquery-1.4.4.js")" type="text/javascript"></script>
<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 () {
        $.validator.unobtrusive.adapters.addSingleVal('fileSize', 'size');
    });
</script>

问题是，即使包含了所有这些脚本和注册新适配器的函数，客户端验证仍然无法正常工作，它只是继续使用服务器端验证...

有什么想法吗？

Answer 1

您缺少一些 JavaScript。

看Brad Wilsons "greater" example来自他的 Advanced ASP.NET MVC 3说话。

其中的一些源代码:

(function ($) {
$.validator.addMethod("jqgreater", function (value, element, params) {
    var thisValue, otherValue;
    if (this.optional(element)) { // No value is always valid
        return true;
    }

    thisValue = parseInt(value);
    otherValue = parseInt($(params).val());
    return thisValue > otherValue;
});

function getModelPrefix(fieldName) {
    return fieldName.substr(0, fieldName.lastIndexOf(".") + 1);
}

function appendModelPrefix(value, prefix) {
    if (value.indexOf("*.") === 0) {
        value = value.replace("*.", prefix);
    }
    return value;
}

$.validator.unobtrusive.adapters.add("greater", ["other"], function (options) {
    var prefix = getModelPrefix(options.element.name),
        other = options.params.other,
        fullOtherName = appendModelPrefix(other, prefix),
        element = $(options.form).find(":input[name=" + fullOtherName + "]")[0];

    options.rules["jqgreater"] = element;  // element becomes "params" in callback
    if (options.message) {
        options.messages["jqgreater"] = options.message;
    }
});
} (jQuery));