有谁知道为什么我会收到此错误:
The model item passed into the dictionary is of type
system.Data.Entity.DynamicProxies.Object_3E186F803589BF82895B10E08C
2A9AB68EFA619599418D6EB96585D14874CDC0',
but this dictionary requires a model item of type
'System.Collections.Generic.IEnumerable`1[MyApplication.Domain.Entities.Object]'.
这是我的代码:
控制器:
public ViewResult Index()
{
if (User.Identity.IsAuthenticated)
{
MembershipUser currentUser = Membership.GetUser();
Guid currentUserId = (Guid)currentUser.ProviderUserKey;
if (currentUser != null && currentUser.ProviderUserKey != null && currentUser.IsApproved)
{
Move result = (from move in db.Moves
where move.UserId == currentUserId
select move).FirstOrDefault();
return View(result);
}
}
return View(db.Moves.ToList());
}
视图:
@model IEnumerable<MovinMyStuff.Domain.Entities.Move>
@{
ViewBag.Title = "Index";
}
@foreach (var item in Model)
{
<div id="move-list-item">
<ul>
<li>
<span class="move-name">
@Html.DisplayFor(modelItem => item.StartCity)
@Html.DisplayFor(modelItem => item.StartState)
@Html.DisplayFor(modelItem => item.StartZip) -
@Html.DisplayFor(modelItem => item.EndCity)
@Html.DisplayFor(modelItem => item.EndState)
@Html.DisplayFor(modelItem => item.EndZip)
</span>
</li>
<li>@Html.ActionLink("Details", "Details", new { id = item.MoveId }, new { @class = "button" })</li>
</ul>
</div>
}
此代码:
Move result = (from move in db.Moves
where move.UserId == currentUserId
select move).FirstOrDefault();
return View(result);
尝试返回单个结果。它抱怨它想要一系列结果。因此,您只需使用:
var results = (from move in db.Moves
where move.UserId == currentUserId
select move).Take(1).ToList();
return View(results);
或:
Move result = (from move in db.Moves
where move.UserId == currentUserId
select move).FirstOrDefault();
return View(new[] { result });
顺便说一下,我个人会在这里摆脱查询表达式 - 它使代码比需要的更复杂。例如,您可以将我的第一个选项重写为:
var results = db.Moves.Where(move => move.UserId == currentUserId)
.Take(1)
.ToList();
return View(results);
甚至:
return View(db.Moves.Where(move => move.UserId == currentUserId)
.Take(1).ToList());