ASP.NET MVC 2.0 自定义客户端验证
我正在尝试创建一个验证器，以确保至少选择 2 个项目。验证器在服务器端正常工作，但客户端代码永远不会被执行。
这是代码：
Sys.Mvc.ValidatorRegistry.validators["country"] = function (rule) {
var min = rule.ValidationParameters["min"];
return function (value, context) {
if (value >= min) return true;
return rule.ErrorMessage;
};
};
这是验证器代码：
public class CountryValidator : DataAnnotationsModelValidator<CustomValidations.CountryAttribute>
{
private int _minimum;
private string _message;
public CountryValidator(ModelMetadata metadata, ControllerContext context, CustomValidations.CountryAttribute attribute) : base(metadata,context,attribute)
{
_minimum = attribute.Minimum;
_message = attribute.ErrorMessage;
}
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
var rule = new ModelClientValidationRule()
{
ErrorMessage = _message,
ValidationType = "country"
};
rule.ValidationParameters.Add("min", _minimum);
return new[] { rule };
}
}
我什至在 global.asax 文件中注册了验证适配器：
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterRoutes(RouteTable.Routes);
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(AgeAttribute), typeof(AgeValidator));
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(CountryAttribute),typeof(CountryValidator));
}
我认为验证器仅适用于具有值属性（如文本框等）的元素。
更新 1：
EnableClientValidation 是正确调用并且所有必需的 JS 文件都包含在项目中。看来我需要将 onblur 附加到上下文中。我会尝试并发布结果。
I am trying to make a validator that will make sure that at least 2 items are selected. The validator works correctly on the server side but the client side code never gets executed.
Here is the code:
Sys.Mvc.ValidatorRegistry.validators["country"] = function (rule) {
var min = rule.ValidationParameters["min"];
return function (value, context) {
if (value >= min) return true;
return rule.ErrorMessage;
};
};
And here is the validator code:
public class CountryValidator : DataAnnotationsModelValidator<CustomValidations.CountryAttribute>
{
private int _minimum;
private string _message;
public CountryValidator(ModelMetadata metadata, ControllerContext context, CustomValidations.CountryAttribute attribute) : base(metadata,context,attribute)
{
_minimum = attribute.Minimum;
_message = attribute.ErrorMessage;
}
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
var rule = new ModelClientValidationRule()
{
ErrorMessage = _message,
ValidationType = "country"
};
rule.ValidationParameters.Add("min", _minimum);
return new[] { rule };
}
}
I have even registered the validation adapter in global.asax file:
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterRoutes(RouteTable.Routes);
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(AgeAttribute), typeof(AgeValidator));
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(CountryAttribute),typeof(CountryValidator));
}
I am thinking that the validator only works with the elements that have a value property like textboxes etc.
UPDATE 1:
EnableClientValidation is invoked correctly and all the required JS files are included in the project. It seems like I need to attach the onblur to the context. I will try that and post the results.
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评论（3）
<% =Html.EnableClientValidation(); %>需要在你的视野中的某个地方。另请确保在同一视图中（在 js 函数之前）引用MicrosoftAjax.js和MicrosoftMvcValidation.js。<% =Html.EnableClientValidation(); %>needs to be in your view somewhere. Also make sure you referenceMicrosoftAjax.jsandMicrosoftMvcValidation.jsin the same view (before your js function).您缺少
MicrosoftMvcAjax.js或者您需要在 jQuery 中实现自定义验证，如 Haack 先生的网站 http://haacked.com/archive/2009/11/19/aspnetmvc2-custom-validation.aspx。Either your missing
MicrosoftMvcAjax.jsor you need to implement your custom validation in jQuery as described on Mr. Haack's website http://haacked.com/archive/2009/11/19/aspnetmvc2-custom-validation.aspx.我认为这是因为输入文本框的 onblur 事件调用了默认验证。对于列表框，不会引发此事件。
I think it is because the default validation is invoked on the onblur event of the input textbox. And for a listbox this event was not being thrown.