无法创建接口的实例

Question

安装配置文件1.1后,在用户内容类型中添加至少一个字段,然后转到用户模块并单击添加新用户,单击保存,您将收到此错误.任何帮助都会很感激.

'/ OrchardLocal'应用程序中的服务器错误.

无法创建接口的实例.描述:执行当前Web请求期间发生未处理的异常.请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息.

Exception Details: System.MissingMethodException: Cannot create an instance of an interface.

Source Error: 


Line 146: public void EndProcessRequest(IAsyncResult result) {
Line 147: try {
Line 148: _httpAsyncHandler.EndProcessRequest(result);
Line 149: }
Line 150: finally {


Source File: C:\Users\rspaulino\Desktop\src\Orchard\Mvc\Routes\ShellRoute.cs Line: 148 

Stack Trace: 


    [MissingMethodException: Cannot create an instance of an interface.]
    System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
    System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
    System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
    System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
    System.Web.Mvc.DefaultModelBinder.CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) +199
    System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +572
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +449
    System.Web.Mvc.DefaultModelBinder.GetPropertyValue(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor, IModelBinder propertyBinder) +17
    System.Web.Mvc.DefaultModelBinder.BindProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor) +399
    System.Web.Mvc.DefaultModelBinder.BindProperties(ControllerContext controllerContext, ModelBindingContext bindingContext) +93
    System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Object model) +53
    System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +1367
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +449
    System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +317
    System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +117
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
    System.Web.Mvc.Controller.ExecuteCore() +116
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
    System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
    System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
    System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
    Orchard.Mvc.Routes.HttpAsyncHandler.EndProcessRequest(IAsyncResult result) in C:\Users\rspaulino\Desktop\src\Orchard\Mvc\Routes\ShellRoute.cs:148
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8963149
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +

184

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版本信息:Microsoft .NET Framework版本:4.0.30319; ASP.NET版本:4.0.30319.237

Answer 1

哇,今天碰到了完全相同的错误(但不确定那是不是同一个模块)!

这是其中一个视图模型中的错误.有人把接口放在那里而不是第一类(例如IUser而不是UserPartRecord).模型绑定器大喊,因为它无法创建将表单参数绑定到的对象的实例.

您唯一的选择是将该参数的类型(您必须找到哪一个)更改为具体类型.最快的方法是创建一个实现该接口的简单类,并用它替换参数类型.

编辑:这里和这里讨论(和解决)类似的问题.