MVC获取部分内部表单的选定数据

Question

我将表格的一半移到一部分。 它包含了大部分的下拉列表。

列表值还可以，但是我没有在提交表单上检索所选数据。

我将局部模型传递到另一个模型中

public VMIdeaDescription ideaDescription = new VMIdeaDescription();

public class VMResource
{
    public VMIdeaDescription ideaDescription = new VMIdeaDescription();
    public List<EntityModality> Modalities { get; set; } = ServicesModality.ModalityGetAll();
    public EntityModality Modality { get; set; }
    public EntityIdeaModality CurrentIdeaModality { get; set; }
    public List<EntityIdeaModality> IdeaModalities { get; set; } = new List<EntityIdeaModality>();}

我认为

@Html.Partial("_Description", Model.ideaDescription)

以及部分内部

<div class="col-sm-12">
    <label>Language</label>
    @Html.DropDownListFor(m => m.SelectedLanguage, Model.Languages.Select(x => new SelectListItem { Value = x.ToString(), Text = x.ToString() }), null, new { @class = "selectpicker" })
</div>

但是vm.ideaDescription.SelectedLanguage始终为空。

oyu可以帮我吗？

谢谢。

---

父模型：

public class VMResource
{
    public List<EntityModality> Modalities { get; set; } = ServicesModality.ModalityGetAll();
    public EntityModality Modality { get; set; }
    public EntityIdeaModality CurrentIdeaModality { get; set; }
    public List<EntityIdeaModality> IdeaModalities { get; set; } = new List<EntityIdeaModality>();
    public string JsonObject { get; set; }
    public dynamic CurrentJsonObject { get; set; }
    public string ModalitiesData { get; set; }
    public string GeneratedHtml { get; set; }
    public int TemplateId { get; set; }
    public List<EntityTemplate> Templates { get; set; } = ServicesTemplate.TemplateGetAll();
    public Enums.StudioObjectType Type { get; set; } = Enums.StudioObjectType.Template;
    public List<EntityList> Destinations { get; set; } = ServicesPMember.GetLists(Common.CurrentPMember.PMemberId);
    public string SelectedDestination { get; set; } = "L";


    public VMIdeaDescription IdeaDescription = new VMIdeaDescription();
}

Partiel模型

public class VMIdeaDescription
{
    public Idea Idea { get; set; } = new Idea();
    public List<EntityTag> Categories { get; set; } = ServicesProject.GetCategoryTree();
    public List<string> SelectedCategory { get; set; }
    public List<string> Languages { get; set; } = CfgVar.USE_LNG_FILTERING_AVAILABLE_LNG.Split(',').ToList();
    public string SelectedLanguage { get; set; }
    public List<EntityCompetency> Competencies { get; set; } = ServicesProject.GetCompetenciesTree(Common.CurrentProject.ProjectId);
    public List<string> SelectedCompetency { get; set; }
    public List<EntitySysTag> SystemTags { get; set; } = ServicesProject.GetSystemTags(Common.CurrentProject.ProjectId);
    public List<EntityPMember> Authors { get; set; } = ServicesProject.GetMembers(Common.CurrentProject.ProjectId);
    public List<int> SelectedAuthors { get; set; } = new List<int>();
    public string Tags { get; set; }
    public string SelectedSystemTag { get; set; }
    public string Thumbnail { get; set; }
    public bool AllowComment { get; set; } = true;
    public bool Published { get; set; } = false;

}

控制器提交

[HttpPost]
    [ValidateInput(false)]
    public ActionResult AutoSaveResource(VMResource vm, string RadioDestinations)
    {
        //title or modality need to be setted to begin register
        if (vm.ModalitiesData != null)
        {
            string title = vm.IdeaDescription.Idea.Title;
            if (string.IsNullOrEmpty(title))
                title = "My resource";

            if (string.IsNullOrEmpty(vm.IdeaDescription.Idea.Content))
                vm.IdeaDescription.Idea.Content = title;

            //publish
            if (vm.IdeaDescription.Published)
                vm.SelectedDestination = "E";
            else
                vm.SelectedDestination = "L";


            vm.IdeaDescription.Idea = Business.Idea.BusinessIdea.Save(vm.IdeaDescription.Idea.IdeaId > 0 ? vm.IdeaDescription.Idea : null, Common.CurrentProject.ProjectId, title, vm.IdeaDescription.Idea.Content,
                "", false, false, "", false, DateTime.Now.ToString("dd/MM/yyyy HH:mm"), Common.CurrentPMember.PMemberId.ToString(), "", vm.IdeaDescription.SelectedLanguage, null, (vm.SelectedDestination == "L" ? true : false), (vm.SelectedDestination == "G" || vm.SelectedDestination == "E" ? true : false), "", vm.IdeaDescription.SelectedCategory, vm.IdeaDescription.SelectedCompetency, vm.IdeaDescription.SelectedSystemTag, false, true, true,
               null, false, "", null, false, null, null, false, 0, vm.IdeaDescription.AllowComment, true, "", false, vm.IdeaDescription.Published, vm.IdeaDescription.Tags);

            if (!string.IsNullOrEmpty(vm.IdeaDescription.Thumbnail))
            {
                vm.IdeaDescription.Idea.Illustration = vm.IdeaDescription.Thumbnail.Trim();
                vm.IdeaDescription.Idea.Update();
            }

            //save modality
            if (vm.ModalitiesData != null)
            {
                EntityIdeaModality ideaModality = new EntityIdeaModality(vm.IdeaDescription.Idea.IdeaId, 0, vm.ModalitiesData, vm.GeneratedHtml, vm.TemplateId, Common.CurrentPMember.PMemberId);
                ServicesModality.IdeaModalitySave(ideaModality);
                vm.IdeaModalities = ServicesModality.IdeaModalityGetAll(vm.IdeaDescription.Idea.IdeaId).OrderByDescending(x => x.Id).ToList();
            }

            //create list if doesn't exist
            string extId = string.Format(Constants.Destination_Studio_Resources, vm.IdeaDescription.Idea.IdeaId);
            EntityList list = ServicesList.GetByExtId(Common.CurrentProject.ProjectId, extId);
            if (list == null)
            {
                //create list
                list = ServicesList.Create(Common.CurrentProject.ProjectId, Common.CurrentPMember.PMemberId, "Draft Idea " + vm.IdeaDescription.Idea.IdeaId, "", true);
                list.ExtId = extId;
                ServicesList.Save(list);
            }

            if (list != null)
            {
                //remove unselected pmember
                List<EntityPMember> listPMembers = ServicesList.GetMembers(list.ListId);
                foreach (EntityPMember listPMember in listPMembers)
                {
                    ServicesList.RemovePMember(listPMember.PMemberId, list.ListId);
                }
                //add current PMemberId if not in
                //if (!listPMembers.Any(x => x.PMemberId == Common.CurrentPMember.PMemberId))
                ServicesList.AddPMember(Common.CurrentPMember.PMemberId, list.ListId);
                //add selected authors
                if (vm.IdeaDescription.SelectedAuthors.Count > 0)
                {
                    foreach (int authorId in vm.IdeaDescription.SelectedAuthors)
                    {
                        if (authorId > 0 && authorId != Common.CurrentPMember.PMemberId)
                            ServicesList.AddPMember(authorId, list.ListId);
                    }
                }
                vm.IdeaDescription.Idea.AddDestination(list.ListId);
            }
        }
        return Json(vm, JsonRequestBehavior.AllowGet);
    }

vm.IdeaDescription内的所有内容均为null，除了已初始化的数据