我面临以下错误。
传递到字典中的模型项的类型为"System.Data.Entity.DynamicProxies.game_04BC2EA428E3397C72CED2755A78B93F676BBC970F6B9A8635AD53B08FEBCB"，但此字典需要类型为"TeamBuildingCompetition.ViewModels.EditGameVM"的模型项
我有一个ASP.NET NVC 5 intranet应用程序。我从视图模型创建了一个编辑视图来更新数据库的内容。有问题的数据库的内容是由富文本编辑器发布的html内容。当我加载编辑视图时，它显示了上面的错误。
以下是我的编辑视图：
@model TeamBuildingCompetition.ViewModels.EditGameVM
@{
ViewBag.Title = "Edit";
Layout = "~/Views/Shared/_Layout_new.cshtml";
}
<script>
tinymce.init({ selector: '#description' });
tinymce.init({ selector: '#gameRule' });
</script>
@using (Html.BeginForm("Update", "Game", FormMethod.Post))
{
@Html.AntiForgeryToken()
<section id="middle">
<div class="container">
<div class="form-horizontal">
<div class="center"><h1>Edit Games </h1></div>
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
@Html.HiddenFor(model => model.gameID)
<div class="form-group">
@Html.LabelFor(model => model.gameName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-8">
@Html.EditorFor(model => model.gameName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.gameName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.description, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-8">
@Html.EditorFor(model => model.description, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.description, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.gameRule, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-8">
@Html.EditorFor(model => model.gameRule, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.gameRule, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.gamePicture, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-8">
@Html.TextBoxFor(model => model.gamePicture, new { @type = "file", @name = "gamePicture" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
</div>
</section>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
以下是编辑视图的视图模型：
namespace TeamBuildingCompetition.ViewModels
{
public class EditGameVM
{
public int gameID { get; set; }
[Required]
[Display(Name = "Game Name")]
public string gameName { get; set; }
[Required][AllowHtml]
[Display(Name = "Description")]
public string description { get; set; }
[Required]
[AllowHtml]
[Display(Name = "Game Rules")]
public string gameRule { get; set; }
[Display(Name = "Game Picture")]
public string gamePicture { get; set; }
}
}
最后，这里是进行更新的控制器：
public ActionResult Update(EditGameVM model)
{
try {
game objGame = new game
{
gameID = model.gameID,
gameName = model.gameName,
description = model.description,
gameRule = model.gameRule,
gamePicture = model.gamePicture.ToString()
};
objBs.gameBs.Update(objGame);
TempData["Msg"] = "Created Successfully!";
return RedirectToAction("Edit");
}
catch (DbEntityValidationException dbEx)
{
var sb = new StringBuilder();
foreach (var validationErrors in dbEx.EntityValidationErrors)
{
foreach (var validationError in validationErrors.ValidationErrors)
{
sb.AppendLine(string.Format("Entity:'{0}' Property: '{1}' Error: '{2}'",
validationErrors.Entry.Entity.GetType().FullName,
validationError.PropertyName,
validationError.ErrorMessage));
}
}
//throw new Exception(string.Format("Failed saving data: '{0}'", sb.ToString()), dbEx);
TempData["Msg"] = sb.ToString();
return RedirectToAction("Edit");
}
}
这是我的获取方法：
public ActionResult Edit(int id = 0)
{
if (id == 0)
{
id = 1;
}
var gameList = objBs.gameBs.GetByID(id);
return View(gameList);
}
我将感谢为解决这一问题所做的一切努力。
您没有将模型发送到视图，因此发现了一个错误。可以这样做：
当您使用一些临时存储机制时，如TempData
TempData["Msg"] = objGame;
return RedirectToAction("Edit");
然后在View的GETAction方法中再次读取它。
public ActionResult Edit()
{
//Here you should cast your TempData to EditGameVM:
EditGameVM receivedModel=TempData["Msg"] as EditGameVM;
//To take data from TempData["Msg"], you should use receivedModel object:
string gameID=receivedModel.gameID;
string gameName=receivedModel.gameName;
return View(receivedModel);
}
TempData使用场景后面的Session对象来存储数据但是一旦读取了数据，数据就会终止
我未能将模型传递给我的视图，因此出现了上述错误。在仔细检查了我的代码后，我根据https://stackoverflow.com/users/3559349/stephen-muecke劝告所有的功劳都归于这位伟人。
public ActionResult Edit(int id = 0)
{
if (id == 0)
{
id = 1;
}
var gameList = objBs.gameBs.GetByID(id);
EditGameVM model = new EditGameVM
{
gameID = id,
gameName = gameList.gameName,
gamePicture = gameList.gamePicture,
gameRule = gameList.gameRule,
description = gameList.description
};
return View(model);
}