Question

我距离让我的创建表单工作一英寸。我的问题是传递到视图模型中的表单的一些数据不会在回发中发回。

型号：

Game:
    GameID - int (primary key, auto-incr)
    GameTitle - nvarchar(100)
    ReviewText - text
    ReviewScore - smallint
    Pros - text
    Cons - text
    LastModified - Datetime
    GenreID - int (foreign key from Genres)

Platform:
    PlatformID - int (primary key, auto-incr)
    Name - nvarchar(50)

GamePlatform (not visible as an EF 4 entity):
    GameID - int (foreign key from Games)
    PlatformID - int (foreign key from Platforms)

我正在使用的视图模型：

public class PlatformListing
{
    public Platform Platform { get; set; }
    public bool IsSelected { get; set; }
}

public class AdminGameReviewViewModel
{
    public Game GameData { get; set; }
    public List<Genre> AllGenres { get; set; }
    public List<PlatformListing> AllPlatforms { get; set; }
}

表格本身：

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<HandiGamer.WebUI.ViewModels.AdminGameReviewViewModel>" %>

<p>
    <%: Html.Label("Game Title") %>
    <%: Html.TextBoxFor(model => Model.GameData.GameTitle) %>
    <%: Html.ValidationMessageFor(model => Model.GameData.GameTitle) %>
</p>
<p>
    <%: Html.LabelFor(model => Model.GameData.GenreID) %>
    <%: Html.DropDownListFor(m => Model.GameData.GenreID, new SelectList(Model.AllGenres, "GenreID", "Name", Model.GameData.GenreID)) %>
</p>
<p>
    <%: Html.Label("Platforms") %><br />
    <% for(var i = 0; i < Model.AllPlatforms.Count; ++i)
       { %>
           <%: Model.AllPlatforms[i].Platform.Name %> <%: Html.CheckBoxFor(p => Model.AllPlatforms[i].IsSelected) %>
    <% } %>
</p>
<p>
    <%: Html.Label("Review") %>
    <%: Html.TextAreaFor(model => Model.GameData.ReviewText) %>
</p>
<p>
    <%: Html.Label("Review Score") %>
    <%: Html.DropDownListFor(m => Model.GameData.ReviewScore,  new SelectList(new int[] {1, 2, 3, 4, 5}))%>
</p>
<p>
    <%: Html.LabelFor(model => model.GameData.Pros) %><br />
    <%: Html.TextAreaFor(model => model.GameData.Pros) %>
</p>
<p>
    <%: Html.LabelFor(model => model.GameData.Cons) %><br />
    <%: Html.TextAreaFor(model => model.GameData.Cons) %>
</p>

最后，我的Create方法（我试图让它工作的准系统）：

    [HttpPost]
    public ActionResult CreateReview([Bind(Prefix = "GameData")]Game newGame, [Bind(Prefix = "AllPlatforms")]List<PlatformListing> PlatformList)
    {
        try
        {
            foreach(var plat in PlatformList)
            {
                if (plat.IsSelected == true)
                {
                    newGame.Platforms.Add(plat.Platform);
                }
            }

            newGame.LastModified = DateTime.Now;

            _siteDB.Games.AddObject(newGame);
            _siteDB.SaveChanges();

            // add form data to entities, then save
            return RedirectToAction("Index");
        }
        catch
        {
            return View();
        }
    }

问题当然是我的复选框。布尔值isSelected设置正常，但是在发布数据时，缺少相应的Platform对象。我以为他们会自动被传回去。那么，关于如何传回PlatformListing的实际Platform部分的任何建议？

Answer 1

关于获取复选框值，如何使用策略described here？

关于将实体对象作为参数传递，我会说你让数据层混合到视图层中，你应该使用专用的ViewModel。

MVC2模型绑定w /多对多：在尖点

1 个答案: