未使用EF 4.1更新MVC3视图

Question

我在更新记录时遇到问题。由于某些原因，它甚至没有触及控制器中的后置动作并返回： “已添加具有相同密钥的项目。”

它似乎表现得好像在做插入而不是更新。我很欣赏这一套新的眼睛。这可能很简单，我错过了。

控制器：

// GET: /Manage/Regions/Edit/5 

    public ActionResult Edit(int id) 
    { 
     Region_CU regionEdit = (from r in db.Venues_Regions 
           where r.RegionsID == id 
           select new Region_CU 
           { 
             RegionsID = r.RegionsID, 
             Name = r.Name, 
             CalendarLink = r.CalendarLink, 
             MapIcon = r.MapIcon, 
             QtrStart = r.QtrStart, 
             QtrEnd = r.QtrEnd, 
             FacebookLikeBox = r.FacebookLikeBox, 
             FacebookId = r.FacebookId 
            // region = r 
           }).Single(); 
     return View(regionEdit); 
    } 

    // 
    // POST: /Manage/Regions/Edit/5 

    [HttpPost] 
    public ActionResult Edit(Region_CU r) 
    { 
     if (ModelState.IsValid) 
     { 
      var v = db.Venues_Regions.First(i => i.RegionsID == r.RegionsID); 
       //v.RegionsID = r.RegionsID; 
       v.Name = r.Name; 
       v.CalendarLink = r.CalendarLink; 
       v.MapIcon = r.MapIcon; 
       v.QtrStart = r.QtrStart; 
       v.QtrEnd = r.QtrEnd; 
       v.FacebookLikeBox = r.FacebookLikeBox; 
       v.FacebookId = r.FacebookId; 
      //Venues_Regions v = new Venues_Regions 
      //{ 
      // RegionsID = r.RegionsID, 
      // Name = r.Name, 
      // CalendarLink = r.CalendarLink, 
      // MapIcon = r.MapIcon, 
      // QtrStart = r.QtrStart, 
      // QtrEnd = r.QtrEnd, 
      // FacebookLikeBox = r.FacebookLikeBox, 
      // FacebookId = r.FacebookId 
      //}; 
      //db.Venues_Regions.Attach(v); 
      //db.ObjectStateManager.ChangeObjectState(v, EntityState.Modified); 
      db.SaveChanges(); 
      return RedirectToAction("Index"); 
     } 
     return View(r); 
    } 

查看：

@model THPT_Razor.Areas.Manage.Models.Region_CU 

@{ 
ViewBag.Title = "Edit Region"; 
} 

<h2>Edit</h2> 
<link href="@Url.Content("~/Content/themes/base/jquery.ui.all.css")" rel="stylesheet" type="text/css" /> 
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"> </script> 

<script> 
    $(document).ready(function() { $('.date').datepicker({ dateFormat: "mm/dd/yy" }); }); 
</script> 
@using (Html.BeginForm()) { 
    @* @Html.ValidationSummary(true)*@ 
<fieldset> 
    <legend>@Html.DisplayFor(model => model.Name)</legend> 

    @Html.HiddenFor(model => model.RegionsID) 
    @Html.HiddenFor(model => model.Name) 
    @Html.HiddenFor(model => model.CalendarLink) 
    <div class="editor-label"> 
     @Html.Label("Map Icon") 
    </div> 
    <div class="editor-field"> 
     @Html.DropDownListFor(model => model.MapIcon, new SelectList(Model.mapicons,"id","Description")) 
    </div> 
    <div class="editor-label"> 
     @Html.Label("Quarter Start") 
    </div> 
    <div class="editor-field"> 
     @Html.TextBoxFor(model => model.QtrStart, new { @class = "date" }) 
     @Html.ValidationMessageFor(model => model.QtrStart) 
    </div> 

    <div class="editor-label"> 
     @Html.Label("Quarter End") 
    </div> 
    <div class="editor-field"> 
     @Html.TextBoxFor(model => model.QtrEnd, new { @class = "date" }) 
     @Html.ValidationMessageFor(model => model.QtrEnd) 
    </div> 

    <div class="editor-label"> 
     @Html.Label("Region Facebook ID") 
    </div> 
    <div class="editor-field"> 
     @Html.EditorFor(model => model.FacebookId) 
     @Html.ValidationMessageFor(model => model.FacebookId) 
    </div> 
    <div class="editor-label"> 
     @Html.Label("Region Facebook LikeBox Code") 
    </div> 
    <div class="editor-field"> 
     @Html.EditorFor(model => model.FacebookLikeBox) 
     @Html.ValidationMessageFor(model => model.FacebookLikeBox) 
    </div> 
    <p> 
     <input type="submit" value="Update" /> 
    </p> 
</fieldset> 

编辑：

我已经收到好几条建议，但我想我还没有明确。 Region_CU不是实体。 Venues_Regions是我想要更新的内容。请参阅以下课程中的意见以进行澄清。最初的目标是构建一个包含Venues_Regions对象和地图图标列表对象的简单包装。但是，字段likebox的数据注释并未传递，导致Venues_Regions对象被分解。现在，当我尝试保存更新时，它甚至不会触及http post操作。我希望这清理了我正在努力完成并寻求帮助。再次感谢所有帮助和快速回复。

//create and update 
public class Region_CU 
{ 

    public Region_CU() 
    { 

    } 
    public List<MapIcon> mapicons { get; set; } 
    //public Venues_Regions region { get; set; } 

    // The fields below are what makes up Veunes_Region 
    // this was broken out from the above Venues_Region 
    // because the UIHint was not being passed through 
    public int RegionsID { get; set; } 
    public string Name { get; set; } 
    public string CalendarLink { get; set; } 
    public int MapIcon { get; set; } 
    public DateTime? QtrStart { get; set; } 
    public DateTime? QtrEnd { get; set; } 

    [UIHint("tinymce_jquery_full"), AllowHtml] 
    public string FacebookLikeBox { get; set; } 
    public string FacebookId { get; set; } 
    public string mapIcon { get; set; } 

} 

编辑＃2： 经过一个良好的夜间睡眠后，解决方案出现了。在更新动作中，我需要做的是从传入的包装器到传入的Venues_Region对象的更改，现在一切正常。

感谢您的所有帮助和建议。

在此先感谢您的帮助， 克里斯

Answer 1

实际上所有你需要做的是加载场馆和调用TryUpdateModel。你甚至不需要传入对象。然后保存场地。另一种方法是使用automapper复制对象之间的字段或使用上述的附加方法，但无论如何不需要手动字段复制。