ASP.NET MVC 3 HtmlHelper异常无法识别继承接口上的ModelMetadata
ASP.NET MVC 3 HtmlHelper异常无法识别继承接口上的ModelMetadata
提问于 2011-01-16 06:24:22
在升级到MVC3RTM之后，我在以前工作的地方得到了一个异常。
这是一个场景。我有几个对象使用相同的底层接口IActivity和IOwned。
IActivity implements IOwned (another interface)
public interface IActivity:IOwned {...}
public interface IOwned
{
int? AuthorId {get;set;}
}我有一个局部视图，它使用IActivity重用其他具体的部分。
下面是活动Partial的定义。
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<IActivity>" %>
<%: Html.HiddenFor(item => item.AuthorId) %>然而，它抛出了一个异常。它在ModelMetadata中找不到AuthorId。
我猜在以前的版本中，它查看了IActivity实现的接口。
有什么想法，建议，不是到处重复相似的界面吗？
已复制下面的堆栈跟踪。
[ArgumentException: The property IActivity.AuthorId could not be found.]
System.Web.Mvc.AssociatedMetadataProvider.GetMetadataForProperty(Func`1 modelAccessor, Type containerType, String propertyName) +498313
System.Web.Mvc.ModelMetadata.GetMetadataFromProvider(Func`1 modelAccessor, Type modelType, String propertyName, Type containerType) +101
System.Web.Mvc.ModelMetadata.FromLambdaExpression(Expression`1 expression, ViewDataDictionary`1 viewData) +393
System.Web.Mvc.Html.InputExtensions.HiddenFor(HtmlHelper`1 htmlHelper, Expression`1 expression, IDictionary`2 htmlAttributes) +57
System.Web.Mvc.Html.InputExtensions.HiddenFor(HtmlHelper`1 htmlHelper, Expression`1 expression) +51
ASP.views_shared_activity_ascx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\Users\...\Documents\Visual Studio 2010\Projects\ngen\trunk\...\Views\Shared\Activity.ascx:3
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +208
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
System.Web.UI.Page.Render(HtmlTextWriter writer) +29
System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +43
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3060页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4702483
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