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POASP.NET MVC: The model item passed into the dictionary is of type 'ClassA', but this dictionary requires a model item of type 'ClassA'
 

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  1. POASP.NET MVC: The model item passed into the dictionary is of type 'ClassA', but this dictionary requires a model item of type 'ClassA'
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    <p>I'm getting a peculiar exception using the Html.RenderPartial method. ASP.NET MVC seems to be unable to an object of type ClassA to an object of type ClassA. I was wondering if anyone knows what's going on.</p> <p>Here's a little more background info. I'm having the following hierarchy in place:</p> <pre><code>public interface IInterface { string Name { get; } } public class ClassA : IInterface { public string Name { get { return "ClassA "; } } } </code></pre> <p>Using these two in a view:</p> <pre><code>&lt;%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage&lt;IEnumerable&lt;IInterface&gt;&gt;" %&gt; &lt;asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server"&gt; &lt;% foreach (IInterface item in Model) { Html.RenderPartial(string.Concat(item.Name, "UserControl"), item); } %&gt; &lt;/asp:Content&gt; </code></pre> <p>And having a UserControl named ClassAUserControl with this header:</p> <pre><code>&lt;%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl&lt;ClassA&gt;" %&gt; </code></pre> <p>Edit: TypeHelpers.IsCompatibleObject(Object value) decides that the two types are different:</p> <pre><code>public static bool IsCompatibleObject&lt;T&gt;(object value) { return ((value is T) || ((value == null) &amp;&amp; TypeAllowsNullValue(typeof(T)))); } </code></pre> <p>In the above case T is ClassA and the type of value is ClassA. That really makes me wonder why 'value is T' fails...</p>
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    1. COhttp://stackoverflow.com/questions/2315129/the-model-item-passed-into-the-dictionary-is-of-type-mvc-models-modela-but-thi/2479865#2479865 may be helpful
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