不是所有的MVC形式的值被张贴

如果可以的话，可以给我一点帮助或建议吗?我有一个MVC表单(它实际上是一个Umbraco表单/表面控制器，但我不知道这有任何关系)，模型包含一个对象列表被用来生成复选框使用HTML助手方法;请参阅下面的帖子，了解我如何渲染这些并在我的子操作中接收它们:https://stackoverflow.com/a/20687405/1285676

所有看起来都工作得很好，除了虽然所有复选框都在提交时被发布，但并非所有复选框都被控制器中的ActionResult方法接收的模型拾取。我已经查看了使用chrome网络工具发布的数据，一切似乎都没问题。(所有复选框似乎都以相同的格式发送回来)，因此最重要的问题是，什么可能阻止模型中某些值被拾取?

这是我的表单渲染复选框的一小段，因为其他部分不应该是相关的(是的，在真实的东西中有一个提交按钮…):

@model MemberPreferencesVM
@using (Html.BeginUmbracoForm<MemberAccountSurfaceController>("HandleDealerMemberPreferencesAccountUpdate", FormMethod.Post, new { @class = "", @id = "dealer-member-account-preferences-form" }))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)
    @for (var j = 0; j < Model.Brands.Count; j++)
    {
        if (Model.Brands[j].Division == Model.Divisions[i].Id.ToString())
        {
            var divisionSelected = Model.Divisions.Any(x => x.Id.ToString() == Model.Brands[j].Division) ? Model.Divisions.FirstOrDefault(x => x.Id.ToString() == Model.Brands[j].Division).Checked : false;
            var checkboxAttr = new Dictionary<string, object> { { "class", "styled" }, { "data-division", Model.Brands[j].Division } };
            var brandSelected = Model.Brands[j].Checked;
            <div class="col-xs-4">
                <label class="option @if (divisionSelected && brandSelected){<text>active</text>}">
                    <img src="@(Model.Brands[j].LogoUrl)" class="center-block" alt="@(Model.Brands[j].Name)" />
                    <span class="checkbox">
                        @Html.HiddenFor(model => model.Brands[j].Id)
                        @Html.HiddenFor(model => model.Brands[j].Name)
                        @Html.CheckBoxFor(model => model.Brands[j].Checked, checkboxAttr)
                    </span>
                </label>
            </div>
        }
    }
}

模型略剪版:

public class MemberPreferencesVM: IValidatableObject
{
    public MemberPreferencesVM()
    {
        init();
    }
    private void init()
    {
        Divisions = [Logic to fetch divisions];
        Brands = [Logic to fetch brands];
    }
    public IList<DivisionVM> Divisions { get; set; }
    public IList<BrandVM> Brands { get; set; }
    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        var pDivisions = new[] { "Divisions" };
        var pBrands = new[] { "Brands" };
        if (!Divisions.Any(x => x.Checked))
        {
            yield return new ValidationResult("Select at least 1 division to view by default", pDivisions);
        }
        if (!Brands.Any(x => x.Checked))
        {
            yield return new ValidationResult("Select at least 1 brand to view by default", pBrands);
        }
    }
}

BrandVM:

public class BrandVM
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string LogoUrl { get; set; }
    public bool Checked { get; set; }
    public string Division { get; set; }
}

ActionResult:

[ValidateAntiForgeryToken]
[ValidateInput(true)]
[HttpPost]
public ActionResult HandleDealerMemberPreferencesAccountUpdate(MemberPreferencesVM model)
{
    //logic removed as model doesn't arrive will all values so not relevant 
    return CurrentUmbracoPage();
}

模型应该包含24个品牌，它似乎只有12个才能到达'HandleDealerMemberPreferencesAccountUpdate'。

感谢任何帮助(我希望这是一些简单的东西，我已经滑倒了)..