ASP.NETMVC3viewmodel、低调的JavaScript和自定义验证

ASP.NETMVC3viewmodel、低调的JavaScript和自定义验证,javascript,jquery,asp.net-mvc-3,unobtrusive-validation,Javascript,Jquery,Asp.net Mvc 3,Unobtrusive Validation,我正在尝试在我的应用程序中编写一个自定义验证方法——我让它在服务器端工作,但我正在尝试扩展它,以便它也在不引人注目的javascript客户端验证中实现。为了增加乐趣,我还使用了viewmodel 这是我做的一个简单的测试-非常简单-一个子对象有三个字段-我正在编写的自定义验证是至少必须填写一个字段(显然我实际的应用程序有一个比这个复杂得多的模型): 型号: public class Child { public int Id { get; set; } [MustHaveFav

我正在尝试在我的应用程序中编写一个自定义验证方法——我让它在服务器端工作,但我正在尝试扩展它,以便它也在不引人注目的javascript客户端验证中实现。为了增加乐趣,我还使用了viewmodel

这是我做的一个简单的测试-非常简单-一个子对象有三个字段-我正在编写的自定义验证是至少必须填写一个字段(显然我实际的应用程序有一个比这个复杂得多的模型):

型号:

public class Child
{
    public int Id { get; set; }
    [MustHaveFavouriteValidator("FavouritePudding", "FavouriteGame")]
    public string FavouriteToy { get; set; }
    public string FavouritePudding { get; set; }
    public string FavouriteGame { get; set; }
}
public class ChildViewModel
{
    public Child theChild { get; set; }
}
    public ActionResult Create()
    {
        var childViewModel = new PeopleAgeGroups.ViewModels.ChildViewModel();
        return View(childViewModel);
    } 
视图模型:

public class Child
{
    public int Id { get; set; }
    [MustHaveFavouriteValidator("FavouritePudding", "FavouriteGame")]
    public string FavouriteToy { get; set; }
    public string FavouritePudding { get; set; }
    public string FavouriteGame { get; set; }
}
public class ChildViewModel
{
    public Child theChild { get; set; }
}
    public ActionResult Create()
    {
        var childViewModel = new PeopleAgeGroups.ViewModels.ChildViewModel();
        return View(childViewModel);
    } 
控制器:

public class Child
{
    public int Id { get; set; }
    [MustHaveFavouriteValidator("FavouritePudding", "FavouriteGame")]
    public string FavouriteToy { get; set; }
    public string FavouritePudding { get; set; }
    public string FavouriteGame { get; set; }
}
public class ChildViewModel
{
    public Child theChild { get; set; }
}
    public ActionResult Create()
    {
        var childViewModel = new PeopleAgeGroups.ViewModels.ChildViewModel();
        return View(childViewModel);
    } 
我遵循了我可以在网上找到的文档,创建了一个自定义验证器,如下所示:

public class MustHaveFavouriteValidator:ValidationAttribute, IClientValidatable
{
    private const string defaultError = "You must have one favourite";

    public string firstOtherFavourite { get; set; }
    public string secondOtherFavourite { get; set; }

    public MustHaveFavouriteValidator(string firstFave, string secondFave)
        : base(defaultError)
    {
        firstOtherFavourite = firstFave;
        secondOtherFavourite = secondFave;
    }

    public override string FormatErrorMessage(string name)
    {
        return string.Format(ErrorMessageString, name, firstOtherFavourite, secondOtherFavourite);
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {

        var aFavouriteObject = validationContext.ObjectInstance.GetType().GetProperty(firstOtherFavourite);
        var bFavouriteObject = validationContext.ObjectInstance.GetType().GetProperty(secondOtherFavourite);

        var aFavourite = aFavouriteObject.GetValue(validationContext.ObjectInstance, null);
        var bFavourite = bFavouriteObject.GetValue(validationContext.ObjectInstance, null);

        if(value==null && aFavourite ==null && bFavourite == null){
            return new ValidationResult(FormatErrorMessage(validationContext.DisplayName), new[] { validationContext.MemberName, aFavouriteObject.Name, bFavouriteObject.Name });


        }


        return ValidationResult.Success;
    }

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        return new[] { new MustHaveFavourite(FormatErrorMessage(metadata.GetDisplayName()), firstOtherFavourite, secondOtherFavourite) };
    }
}
最后,我的自定义javascript将所有内容结合在一起:

(function ($) {
jQuery.validator.addMethod("musthavefavourite", function (value, element, params) {

    var $firstOtherFavouriteObject = $('#' + params.firstotherfavourite);
    var firstOtherFavourite = $firstOtherFavouriteObject.val();
    var $secondOtherFavouriteObject = $('#' + params.secondotherfavourite);
    var secondOtherFavourite = $secondOtherFavouriteObject.val();
    if (value == '' && firstOtherFavourite == '' && secondOtherFavourite == '') {
        return false;
    } else {
        return true;

    }
});
$.validator.unobtrusive.adapters.add("musthavefavourite", ["firstotherfavourite", "secondotherfavourite"],
    function (options) {
        options.rules['musthavefavourite'] = {
            firstotherfavourite: options.params.firstotherfavourite,
            secondotherfavourite: options.params.secondotherfavourite
        };
        options.messages['musthavefavourite'] = options.mesage;
    }

);
} (jQuery));
出现的问题是,在生成的HTML中,我得到的文本元素的id前缀为“theChild”—这很有意义,因为我的viewmodel声明了一个子对象,但是,我的自定义函数在元素名称上没有前缀。有没有办法将该前缀传递到javascript,而不实际将其修改为如下所示:

jQuery.validator.addMethod("musthavefavourite", function (value, element, params) {
    var $firstOtherFavouriteObject = $('#theChild_' + params.firstotherfavourite);
    var firstOtherFavourite = $firstOtherFavouriteObject.val(); 

在我看来,这有点挫败了创建我的验证服务器端,然后连接所有这些额外的gumf来进行不引人注目的验证的想法,因为我已经创建了一段javascript,它实际上只能与表单/视图模型组合一起使用。

您可以修改您的验证程序来检查任何前缀,并将前缀添加到要检查的元素的选择器中,如我在回答此问题时所述:。您需要(1)将选择器更改为按名称而不是按id搜索,或(2)使用
\u
而不是
拆分id