传递到字典的模型项的类型是“MyType的'，但本词典需要类型的模型项目”的MyType“ [英] The model item passed into the dictionary is of type 'MyType', but this dictionary requires a model item of type 'MyType'

问题描述

是的，我通过与类似的标题问题了。他们似乎都不符合我在的情况。它只是程序员发送一个错误的对象类型的视图。

这是我收到确切的错误信息：

  

传递到字典的模型项的类型是IS.Extensions.Models.ContactSelectList'，但本词典需要类型的IS.Extensions.Models.ContactSelectList的典范项目。

我开始在左右我们的解决方案的意见和模型类运动，企图使之框状。有了这个，我的意思是，我们已经在多个MVC应用时的一些看法/模型和一些看法/型号特定于某个MVC应用程序。结果
这个问题开始后，移动ContactSelectList视图。结果
常见的观点是，它使用剃刀发电机来编译它们的项目。

我有这个在我看来：

  @model IS.Extensions.Models.ContactSelectList
 

和调试时，我可以看到我发送到的RenderPartial方法模型是同类型的：

一些图片的标题说明：

• IS是MVC Web应用程序和引用IS.Extensions


• IS.Extensions是被引用一个类库


• ContactSelectList.cshtml位于IS \\查看\\控制


• 的ContactSelectList.cs模型类位于IS.Extensions \\型号


• 在'父视图（即触发该调用的RenderPartial坐落在共同项目的看法：ZModel.Web \\查看\\控制

有没有人有任何想法是怎么回事？错误消息是有点混乱，不是一个真正的帮助..

埃里克斯评论后编辑：

包含模型类（ContactSelectList.cs）大会是动态加载。为什么？因为我认为这是有道理创造一种扩展/插件系统，其中在一定的目录下有一定的dll扩展了普通车型的一些特殊应用的几种。结果
这就是（略有修改）：

  VAR zExtenderAssembly = Assembly.LoadFile（路径）;
extenderType = zExtenderAssembly.GetTypes（）了ToList（），其中（T =＆GT; t.GetInterface（IZExtender）！= NULL）。.FirstOrDefault（）;
回报（Activator.CreateInstance（extenderType）为IZExtender）.CreateBO（ContactSelectList）;
 

在ZExtender（实现IZExtender部）CreateBo'方法简单地创建一个ContactSelectList的一个新实例（它是在相同的库作为ZExtender，所以无反射需要）：

 公共组件CreateBO（字符串名称）
{
    ...
            返回新ContactSelectList（）;
    ...
}
 

解决方案

我感动扩展DLL到Web应用程序的bin目录下，并修改该dll被加载的方式。结果
我曾经通过指定.dll文件的完整路径来加载它。加载使用的Assembly.Load（'myAssemblyName'）扩展DLL，使一切工作如前。

Yes, I went through the questions with similar titles. None of them seem to match the situation I'm in. It's simply the programmer sending a wrong object type to the view.

This is the exact error message I'm receiving:

The model item passed into the dictionary is of type 'IS.Extensions.Models.ContactSelectList', but this dictionary requires a model item of type 'IS.Extensions.Models.ContactSelectList'.

I started moving around views and model classes in our solution in an attempt to make it 'framework-like'. With this I mean that some views/models we have are used in multiple MVC applications and some views/models are specific for a certain MVC application.
The issue started áfter moving the ContactSelectList view.
Common views are in a project that uses the Razor generator to compile them.

I have this in my view:

@model IS.Extensions.Models.ContactSelectList

and when debugging I can see that the model I'm sending to the RenderPartial method is of THE SAME TYPE:

Some sidenotes:

• IS is a MVC web app and references IS.Extensions
• IS.Extensions is a class library referenced by IS
• ContactSelectList.cshtml is located in IS\Views\Controls
• The ContactSelectList.cs model class is located in IS.Extensions\Models
• The 'parent view' (the view that triggers this RenderPartial call is situated in the 'common' project: ZModel.Web\Views\Controls

Does anyone have any idea what's going on here? The error messages is kinda confusing and not really a help..

Edit after Erics comment:

The assembly containing the model class (ContactSelectList.cs) is dynamically loaded. Why? Because I thought it makes sense to create a kind of extension / plugin system, where dropping a certain dll in a certain directory extends the common models with some application specific ones.
This is how (slightly modified):

var zExtenderAssembly = Assembly.LoadFile(path);
extenderType = zExtenderAssembly.GetTypes().ToList().Where(t => t.GetInterface("IZExtender") != null).FirstOrDefault();
return (Activator.CreateInstance(extenderType) as IZExtender).CreateBO("ContactSelectList");

The 'CreateBo' method in the ZExtender (implements IZExtender) simply creates a new instance of a ContactSelectList (which is in the same library as the ZExtender, so no reflection needed):

public Component CreateBO(string name)
{
    ...
            return new ContactSelectList();
    ...
}

解决方案

I moved the extension dll to the bin directory of the web application and changed the way the dll is loaded.
I used to load it by specifying the full path to the .dll file. Loading the extension dll using Assembly.Load('myAssemblyName'), made everything work as before.

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