C# 传递到字典中的模型项属于视图模型类型，但需要通用IEnum_C#_Asp.net Mvc_Linq_Razor_Dictionary

C# 传递到字典中的模型项属于视图模型类型，但需要通用IEnum

c# asp.net-mvc linq razor dictionary

C# 传递到字典中的模型项属于视图模型类型，但需要通用IEnum,c#,asp.net-mvc,linq,razor,dictionary,C#,Asp.net Mvc,Linq,Razor,Dictionary,我的应用程序发生了灾难性的事情。每个详细信息页面都开始显示：传递到字典中的模型项的类型为 “MyBlogger.Models.PostViewModel”，但此词典需要一个模型类型项 'System.Collections.Generic.IEnumerable'1[MyBlogger.Models.Post]' 前一分钟还不错，下一分钟就开始这样做了，每一个细节页面都在做一些字典类型的变化我导航到的页面是http://localhost:52202/Post/MainDetails/te

我的应用程序发生了灾难性的事情。每个详细信息页面都开始显示：

传递到字典中的模型项的类型为 “MyBlogger.Models.PostViewModel”，但此词典需要一个模型类型项 'System.Collections.Generic.IEnumerable'1[MyBlogger.Models.Post]'

前一分钟还不错，下一分钟就开始这样做了，每一个细节页面都在做一些字典类型的变化

我导航到的页面是

http://localhost:52202/Post/MainDetails/test-上传

，

http://localhost:52202/Post/Details/qwdqwdw

etc

例如，第一个链接的控制器操作如下：

namespace MyBlogger.Controllers
{
    public class PostController : Controller
    {
        private BlogEntities db = new BlogEntities();
        //public Tag tags = new Tag();
        //
        // GET: /Post/
        [Authorize]
        public ActionResult Index()
        {
            Dictionary<int, string> postImages = new Dictionary<int, string>();
            var posts = db.Posts.Where(p => p.BlogUserEmail == User.Identity.Name).Include(p => p.BlogUser).Include(p => p.Category);
            foreach (var item in posts)
            {
                byte[] buffer = item.Picture;
                postImages.Add(item.Id, Convert.ToBase64String(buffer));
            }
            ViewBag.Images = postImages;
            return View(posts.ToList());
        }
        //
        // GET: /Post/Details/5
        //[Authorize]
        public ActionResult Details(string urlslug)
        {
            Post post = db.Posts.First(m => m.UrlSlug == urlslug);
            byte[] buffer = post.Picture;
            ViewBag.ImageToShow = Convert.ToBase64String(buffer);
            if (post == null)
            {
                return HttpNotFound();
            }
            return View(post);
        }
        public ActionResult MainDetails(string urlslug)
        {
            Post post = db.Posts.First(m => m.UrlSlug == urlslug);
            List<Post> posts = db.Posts.ToList();

            byte[] buffer = post.Picture;
            ViewBag.ImageToShow = Convert.ToBase64String(post.Picture);

            PostViewModel model = new PostViewModel
            {
                CurrentPost = post,
                Posts = posts
            };

            if (post == null)
            {
                return HttpNotFound();
            }

            return View(model.Posts);
        }

名称空间MyBlogger.Controllers
{
公共类后控制器：控制器
{
私有BlogEntities db=新BlogEntities（）；
//公共标记tags=新标记（）；
//
//获取：/Post/
[授权]
公共行动结果索引（）
{
Dictionary postImages=新字典（）；
var posts=db.posts.Where（p=>p.BlogUserEmail==User.Identity.Name）。Include（p=>p.BlogUser）。Include（p=>p.Category）；
foreach（POST中的var项目）
{
字节[]缓冲区=项。图片；
postmages.Add（item.Id，Convert.ToBase64String（buffer））；
}
ViewBag.Images=后期图像；
返回视图（posts.ToList（））；
}
//
//获取：/Post/Details/5
//[授权]
公共操作结果详细信息（字符串urlslug）
{
Post Post=db.Posts.First（m=>m.urlslaug==urlslaug）；
字节[]缓冲区=后期图片；
ViewBag.ImageToShow=Convert.TOBASE64字符串（缓冲区）；
if（post==null）
{
返回HttpNotFound（）；
}
返回视图（post）；
}
public ActionResult MainDetails（字符串urlslug）
{
Post Post=db.Posts.First（m=>m.urlslaug==urlslaug）；
List posts=db.posts.ToList（）；
字节[]缓冲区=后期图片；
ViewBag.ImageToShow=Convert.tobase64字符串（post.Picture）；
PostViewModel模型=新的PostViewModel
{
CurrentPost=post，
职位=职位
};
if（post==null）
{
返回HttpNotFound（）；
}
返回视图（model.Posts）；
}

PostViewModel是这样的：

namespace MyBlogger.Models
{
    public class PostViewModel
    {
        public Post CurrentPost { get; set; }
        public IEnumerable<Post> Posts { get; set; }
        public Tag CurrentTag { get; set; }
        public IEnumerable<SelectListItem> Tags { get; set; }
        private List<int> _selectedPostTags;
        public List<int> SelectedPostTags
        {
            get
            {
                if (_selectedPostTags == null)
                {
                    _selectedPostTags = CurrentPost.Tags.Select(m => m.Id).ToList();
                }
                return _selectedPostTags;
            }
            set { _selectedPostTags = value; }
        }
    }
}

名称空间MyBlogger.Models
{
公共类后视图模型
{
公共Post CurrentPost{get；set；}
公共IEnumerable Posts{get；set；}
公共标记CurrentTag{get；set；}
公共IEnumerable标记{get；set；}
私有列表\u选择的PostTags；
公共列表SelectedPostTags
{
得到
{
如果（_selectedPostTags==null）
{
_selectedPostTags=CurrentPost.Tags.Select（m=>m.Id.ToList（）；
}
返回所选的PostTags；
}
设置{u selectedPostTags=value；}
}
}
}

MainDetails视图：

@model MyBlogger.Models.PostViewModel

@{
    ViewBag.Title = "MainDetails";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>@Html.DisplayFor(model => model.CurrentPost.Title)</h2>

<header class="intro-header">
    <div class="container">
        <div class="row">
            <div>
                <div class="post-heading">
                    @*<a href="#">*@
                    <img class="img-responsive" src="@Html.Raw("data:image/jpeg;base64," + ViewBag.ImageToShow)" alt="">

                        <h1>@Html.DisplayFor(model => model.CurrentPost.ShortDescription)</h1>
                    <p class="text-left">Posted by <a href="#">@Html.DisplayFor(model => model.CurrentPost.BlogUserEmail)</a> on @Html.DisplayFor(model => model.CurrentPost.PostedOn)</p>
                    <p class="text-left">Category <a href="#">@Html.DisplayFor(model => model.CurrentPost.Category.Name)</a></p>

                    @*</a>*@
                </div>
            </div>
        </div>
    </div>
</header>

<fieldset>
    <div class="display-field">
        @*@Html.DisplayFor(model => model.BlogUserEmail)*@
    </div>

    <div class="display-field">
        @Html.Raw(HttpUtility.HtmlDecode(Model.CurrentPost.Description))
    </div>

    <div class="display-field">
        @Html.DisplayFor(model => model.CurrentPost.Modified)
    </div>
</fieldset>
@Html.Partial("SimilarPosts", Model.Posts)

@model MyBlogger.Models.PostViewModel
@{
ViewBag.Title=“MainDetails”；
Layout=“~/Views/Shared/_Layout.cshtml”；
}
@DisplayFor（model=>model.CurrentPost.Title）
@*在@Html.DisplayFor上（model=>model.CurrentPost.PostedOn）
类别
@**@
@*@DisplayFor（model=>model.BlogUserEmail）*@
@Html.Raw（HttpUtility.HtmlDecode（Model.CurrentPost.Description））
@DisplayFor（model=>model.CurrentPost.Modified）
@Html.Partial（“SimilarPosts”，Model.Posts）

这似乎没有什么问题为什么我的整个应用程序都开始出现这些错误

堆栈跟踪：

    [InvalidOperationException: The model item passed into the dictionary is of type 'MyBlogger.Models.PostViewModel', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[MyBlogger.Models.Post]'.]
   System.Web.Mvc.ViewDataDictionary`1.SetModel(Object value) +585831
   System.Web.Mvc.ViewDataDictionary..ctor(ViewDataDictionary dictionary) +371
   System.Web.Mvc.WebViewPage`1.SetViewData(ViewDataDictionary viewData) +48
   System.Web.Mvc.WebViewPage.ConfigurePage(WebPageBase parentPage) +60
   System.Web.WebPages.<>c__DisplayClass7.<RenderPageCore>b__6(TextWriter writer) +218
   System.Web.WebPages.HelperResult.WriteTo(TextWriter writer) +10
   System.Web.WebPages.WebPageBase.Write(HelperResult result) +71
   System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body) +64
   System.Web.WebPages.WebPageBase.PopContext() +246
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +95
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +258
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +295
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +242
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +21
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +177
   System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +89
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +102
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +57
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +43
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +57
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +47
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +47
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9658396
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

[InvalidOperationException:传入字典的模型项的类型为'MyBlogger.Models.PostViewModel'，但此字典需要'System.Collections.Generic.IEnumerable'1[MyBlogger.Models.Post]'类型的模型项。]
System.Web.Mvc.ViewDataDictionary`1.SetModel（对象值）+585831
System.Web.Mvc.ViewDataDictionary..ctor（ViewDataDictionary）+371
System.Web.Mvc.WebViewPage`1.SetViewData（ViewDataDictionary viewData）+48
System.Web.Mvc.WebViewPage.ConfigurePage（WebPageBase父页面）+60
System.Web.WebPages.c___显示类7.b____6（TextWriter）+218
System.Web.WebPages.HelperResult.WriteTo（TextWriter）+10
System.Web.WebPages.WebPageBase.Write（HelperResult结果）+71
System.Web.WebPages.WebPageBase.RendersUrounding（字符串partialViewName，Action`1 body）+64
System.Web.WebPages.WebPageBase.PopContext（）+246
System.Web.WebPages.WebPageBase.ExecutePageHierarchy（WebPageContext-pageContext，TextWriter-writer，WebPageRenderingBase-startPage）+95
System.Web.Mvc.RazorView.RenderView（ViewContext、TextWriter、Object实例）+258
System.Web.Mvc.buildmanager compiledview.Render（ViewContext、TextWriter）+115
System.Web.Mvc.ViewResultBase.ExecuteResult（ControllerContext上下文）+295
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult（ControllerContext ControllerContext，ActionResult ActionResult）+13
System.Web.Mvc.c__显示Class1A.b_17（）+23
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter（IResultFilter筛选器，ResultExecutingContext预文本，Func`1 continuation）+242
System.Web.Mvc.c__显示Class1C.b__19（）+21
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters（ControllerContext ControllerContext，IList`1过滤器，ActionResult ActionResult）+177
System.Web。