Question

我有一个实际回答的情景here

该样本完美无缺。我尝试在我的项目中使用它，我在其中添加了RequiredIf属性的精确服务器端代码（复制和粘贴）。我还添加了jquery.validate.js，jquery.validate.unobtrusive.js并添加了一个添加'requiredif'方法的脚本[$ .validator.addMethod（'requiredif'，.......]和[$ .validator.unobtrusive.adapters.add（........]

从上面的链接中复制并粘贴。通过firebug，我看到我的解决方案中加载了所有脚本。输入字段都通过data-val-requiredif正确识别requiredif unobtrusive属性。

经过几个小时的调试后，我注意到工作样本和我的样本之间的唯一区别是，在工作样本中，当通过firebug查看时，规则集合确实包含requiredif规则，而我的包含所有（stringlength等）除外对于requiredif并解释他们为什么不开火。

属性RequiredIf已添加到viewmodel，属性的代码是上面链接的直接副本。正在调用属性的GetClientValidationRules方法，但规则不会显示在客户端。

非常集市。任何有关调试的帮助都表示赞赏。

更新

这是RequiredIf属性：

public class RequiredIfAttribute : ValidationAttribute, IClientValidatable
{
    private RequiredAttribute _innerAttribute = new RequiredAttribute();

    public string DependentProperty { get; set; }
    public object TargetValue { get; set; }

    public RequiredIfAttribute(string dependentProperty, object targetValue)
    {
        this.DependentProperty = dependentProperty;
        this.TargetValue = targetValue;
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        // get a reference to the property this validation depends upon
        var containerType = validationContext.ObjectInstance.GetType();
        var field = containerType.GetProperty(this.DependentProperty);

        if (field != null)
        {
            // get the value of the dependent property
            var dependentvalue = field.GetValue(validationContext.ObjectInstance, null);

            // compare the value against the target value
            if ((dependentvalue == null && this.TargetValue == null) ||
                (dependentvalue != null && dependentvalue.Equals(this.TargetValue)))
            {
                // match => means we should try validating this field
                if (!_innerAttribute.IsValid(value))
                    // validation failed - return an error
                    return new ValidationResult(this.ErrorMessage, new[] { validationContext.MemberName });
            }
        }

        return ValidationResult.Success;
    }

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

        string depProp = BuildDependentPropertyId(metadata, context as ViewContext);

        // find the value on the control we depend on;
        // if it's a bool, format it javascript style 
        // (the default is True or False!)
        string targetValue = (this.TargetValue ?? "").ToString();
        if (this.TargetValue.GetType() == typeof(bool))
            targetValue = targetValue.ToLower();

        rule.ValidationParameters.Add("dependentproperty", depProp);
        rule.ValidationParameters.Add("targetvalue", targetValue);

        yield return rule;
    }

    private string BuildDependentPropertyId(ModelMetadata metadata, ViewContext viewContext)
    {
        // build the ID of the property
        string depProp = viewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(this.DependentProperty);
        // unfortunately this will have the name of the current field appended to the beginning,
        // because the TemplateInfo's context has had this fieldname appended to it. Instead, we
        // want to get the context as though it was one level higher (i.e. outside the current property,
        // which is the containing object (our Person), and hence the same level as the dependent property.
        var thisField = metadata.PropertyName + "_";
        if (depProp.StartsWith(thisField))
            // strip it off again
            depProp = depProp.Substring(thisField.Length);
        return depProp;
    }
}

GetClientValidationRules确实受到了攻击。添加到视图模型的属性示例为：

[RequiredIf("Openid_Identifier", "", ErrorMessage = "Please choose a proper login.")]
[StringLength(50, ErrorMessage = "Email address is too long.")]        
[RegularExpression(@"^[\w-]+(\.[\w-]+)*@([a-z0-9-]+(\.[a-z0-9-]+)*?\.[a-z]{2,6}|(\d{1,3}\.){3}\d{1,3})(:\d{4})?$", ErrorMessage = "Incorrect email format.")]
public string Email { get; set; }

StringLength和RegEx都工作，我看到验证错误。要求如果没有。在从原始链接起作用的示例中，如果我将断点放在

中

$.validator.addMethod('requiredif',
function (value, element, parameters) {
    debugger;
    var id = '#' + parameters['dependentproperty'];

确实受到了打击。在我的解决方案中，由于我上面提到的内容，它永远不会被击中（requiredif没有被添加到规则集合中）。

更新2

我正在使用并行javascript加载程序（headjs）并行加载javascript文件。如果我有：

<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/headjs/0.96/head.min.js"></script>
<script type="text/javascript">
head.js("http://ajax.aspnetcdn.com/ajax/jquery.validate/1.8.1/jquery.validate.min.js")
    .js("http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.min.js")
    .js("http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.unobtrusive-ajax.min.js")
    .js("@Url.ScriptFromLocal("requiredif.js")");
</script>

然后它不起作用。如果我有常规的脚本标签，那么一切都很好。我在任何地方都使用并行加载程序，它工作正常，包括可行的开箱即用属性。如果我并行加载js文件，自定义的是不行。

Answer 1

任何动态，无论是动态html还是动态javascript文件，都需要使用$ .validator.unobtrusive.parse（'＃some_form_container'）重新分析数据，一切都很好。

感谢那些回复的人。

不引人注目的规则不会呈现给客户端

1 个答案: