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最近我发布了一个关于 html helper 下拉列表的问题并让它工作(这里)。但是现在我决定切换到 ModelView 模式要聪明得多,这样我就可以在我的视图等中访问强类型方法。我所做的是我通过以下方式对其他主题中的代码进行了一些调整:

VacatureFormViewModel:

public class VacaturesFormViewModel
{
    public Vacatures Vacature { get; private set; }
    public SelectList EducationLevels { get; private set; }
    public SelectList Branches { get; private set; }
    public SelectList CareerLevels { get; private set; }

    Repository repository;

    // Constructor
    public VacaturesFormViewModel(Vacatures vacature)
    {
        this.Vacature = vacature;
        this.repository = new Repository();
        this.EducationLevels = new SelectList(repository.GetAllEducationLevels(),"ID","Name",vacature.EducationLevels);
        this.Branches = new SelectList(repository.GetAllBranches(),"ID","Name",vacature.Branches);
        this.CareerLevels = new SelectList(repository.GetAllCareerLevels(), "ID", "Name", vacature.CareerLevels);

    }
}

Banen控制器:

//
    // GET: /Banen/Create

    public ActionResult Create()
    {
        Vacatures vacature = new Vacatures();
        return View(new VacaturesFormViewModel(vacature));
    }

    //
    // POST: /Banen/Create

    [AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Create(Vacatures vacatureToAdd)
    {
        if (ModelState.IsValid)
        {
            try
            {
                // TODO: Add insert logic here
                repository.AddToVacatures(vacatureToAdd);
                repository.SaveChanges();

                // Return to listing page if succesful
                return RedirectToAction("Index");
            }
            catch (Exception e)
            {
                return View();
            }
        }
    }

还有我的 Create.aspx 视图(它的一部分):

<% using (Html.BeginForm()) {%>

    <fieldset>
        <legend>Fields</legend>
        <p>
            <label for="Title">Title:</label>
            <%= Html.TextBox("Title", Model.Vacature.Title) %>
            <%= Html.ValidationMessage("Title", "*") %>
        </p>
        <p>
            <label for="Content">Content:</label>
            <%= Html.TextArea("Content", Model.Vacature.Content) %>
            <%= Html.ValidationMessage("Content", "*") %>
        </p>
        <p>
            <label for="EducationLevels">EducationLevels:</label>
            <%= Html.DropDownList("EducationLevels", Model.EducationLevels)%>
            <%= Html.ValidationMessage("EducationLevels", "*") %>
        </p>
        <p>
            <label for="CareerLevels">CareerLevels:</label>
            <%= Html.DropDownList("CareerLevels", Model.CareerLevels)%>
            <%= Html.ValidationMessage("CareerLevels", "*")%>
        </p>
        <p>
            <label for="Branches">Branches:</label>
            <%= Html.DropDownList("Branches", Model.Branches)%>
            <%= Html.ValidationMessage("Branches", "*")%>
        </p>
        <p>
            <input type="submit" value="Save" />
        </p>
    </fieldset>
<% } %>

为了指导,我使用了ScottGu 的NerdDinner教程,并且在这里阅读了各种主题。

我的问题是是否可以让 MVC ASP 自动设置我的职业级别、教育级别和分支(下拉列表),因为它当前返回的 ID 字符串不是我想要的。当我将 SelectList 的创建更改为:

this.CareerLevels = new SelectList(repository.GetAllCareerLevels(), vacature.CareerLevels);

因此,如果没有“ID”和“名称”,它也不会保存(我猜它仍然在 post 方法中作为字符串返回,而不是对象本身)并且在此旁边,它在视图中列为:vacature。 EducationLevels 等。因此,列出的不是名称,而是对象本身。

最后一个问题 所以,简而言之,我的问题是是否可以使用这种方法来设置我的分支、教育水平和职业水平。所以不是自动的?

在这种情况下,我仍然必须使用以下内容:

[AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Create(FormCollection form)
    {
        Vacatures vacatureToAdd = new Vacatures();

        // Retrieve the education level by its ID
        if (!form["EducationLevels"].Equals(""))
        {
            Guid educationID = new Guid(form["EducationLevels"]);
            vacatureToAdd.EducationLevels = repository.GetEducationLevelByID(educationID);
        }

在我的控制器中?或者还有其他更流畅的选择。

4

3 回答 3

2

编辑使用Guid:

对于下拉列表,我使用稍微不同的方法。有可能让你的视图模型工作,但对我来说,这样更容易:

public class VacaturesFormViewModel
{

    public IEnumerable<SelectListItem>EducationLevels{ get; set; }
    public Guid EducationLevelID{ get; set; }

}

EducationLevelID 将具有您的下拉列表的选定 ID。这是视图:

<%= Html.DropDownList("EducationLevelID", Model.EducationLevels)%>

控制器

  IEnumerable<SelectListItem> educationLevelList =
                            from level in GetLevelList()
                            select new SelectListItem
                            {
                                Text = level .Name,
                                Value = level.Uid.ToString()
                            };
  model.EducationLevels = educationLevelList ;
于 2009-06-26T08:57:08.317 回答
1

我不确定,但我认为您应该创建模型活页夹。(大卫海登写了一个简单的模型活页夹)

于 2009-06-26T08:27:44.400 回答
1

您可以自动绑定educationID参数:

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create(Guid? educationID, FormCollection form)
{
    Vacatures vacatureToAdd = new Vacatures();

    if (educationID != null)
    {
        vacatureToAdd.EducationLevels = 
            repository.GetEducationLevelByID(educationID.Value);
    }
于 2009-06-26T09:48:02.600 回答