asp.net-mvc – Knockout.js&复选框列表：发布到mvc控制器

public class DirectorySearchModel
{
    [Display(Name = "First name contains")]
    public string FirstName { get; set; }

    [Display(Name = "Last name contains")]
    public string LastName { get; set; }

    public CountriesCollection Countries { get; set; }
    public IEnumerable<Country> SelectedCountries { get; set; }
    public IEnumerable<Country> AllCountries { get; set; }
}

CountriesCollection对象(第9行)如下所示：

public class CountriesCollection
{
    [Display(Name = "Countries")]
    public int[] arrCountries { get; set; }
}

现在,我正在创建一个新的,空白的CountriesCollection实例,然后将其添加到DirectorySearchModel视图模型的空白实例中,然后将其全部序列化为Knockout.js的javascript视图模型：

{
"FirstName":null,"LastName":null,"Countries":{"arrCountries":[]},"SelectedCountries":[{"RelationshipManager":{},"CountryId":1,"CountryName":"UK"},{"RelationshipManager":{},"CountryId":2,"CountryName":"France"},"CountryId":3,"CountryName":"Spain"}],"AllCountries":[{"RelationshipManager":{},"CountryName":"Spain"}]
}

我的复选框呈现为：< input checked =“checked”data-bind =“checked：Countries.arrCountries”id =“Countries_arrCountries30”name =“Countries.arrCountries”type =“checkbox”value =“1”>.检查一对夫妇意味着你最终得到这个Knockout.js视图模型：

{
"FirstName":null,"Countries":{"arrCountries":["1","3"]},"CountryName":"Spain"}]
}

正常提交我的视图(即通过提交按钮而不是Knockout.js)到一个需要DirectorySearchModel的MVC操作,我可以请求model.Countries.arrCountries获取已检查项目的列表,但是当我使用…

$.post("/MyController/MyAction",ko.toJS(viewModel),function(returnData) {
    $("#resultCount").html(returnData);
});

要么…

$.post("/MyController/MyAction",viewModel,function(returnData) {
    $("#resultCount").html(returnData);
});

对于需要相同DirectorySearchModel的另一个动作,model.Countries.arrCountries始终为null！我想知道是否由于Knockout.js在MVC期待int [] s时将arrCountries条目发布为string [] s,但更改我的MVC代码以期望string [] s似乎没有太大变化……！ DirectorySearchModel中的CountriesCollection对象似乎存在,但是其中的arrCountries始终为null.

有任何想法吗？任何帮助非常感谢！

编辑

接收Knockout.js viewModel的操作：

public MvcHtmlString ResultCount(DirectorySearchModel model)
{
    return new MvcHtmlString(getResultCount(model).ToString());
}

getResultCount方法：

public int getResultCount(DirectorySearchModel model)
{
    IUserRepository userRepository = new UserRepository();
    int count = userRepository.Search(model,null).Count();
    return count;
}

固定！

感谢Konstantin指出从$.post到$.ajax的简单切换将我的Knockout.js视图模型发送回我的mvc动作就是所有需要的！这是我正在使用的$.ajax代码：

$.ajax({  
    type: "POST",url: "/MyController/MyAction",data: ko.toJSON(viewModel),contentType: "application/json; charset=utf-8",dataType: "json",success: function (data) {
        $("#resultCount").html(data);
    }
});