Issue With Manager Class

Hi,

I'm developing custom module. I have 2 model classes. Both of them derived from Content. 
In this case I develope 2 manager classes ,they share the same data provider.
However the content which backend  I access later will throw this error.

The type String cannot be constructed. You must configure the container to supply this value.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: The type String cannot be constructed. You must configure the container to supply this value.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[InvalidOperationException: The type String cannot be constructed. You must configure the container to supply this value.] Telerik.Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimitive(IBuilderContext context, SelectedConstructor selectedConstructor) +161 Telerik.Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.PreBuildUp(IBuilderContext context) +136 Telerik.Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) +190 Telerik.Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlanCreatorPolicy.CreatePlan(IBuilderContext context, NamedTypeBuildKey buildKey) +108 Telerik.Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) +137 Telerik.Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) +190 Telerik.Microsoft.Practices.ObjectBuilder2.BuilderContext.NewBuildUp(NamedTypeBuildKey newBuildKey) +113 Telerik.Microsoft.Practices.Unity.ObjectBuilder.NamedTypeDependencyResolverPolicy.Resolve(IBuilderContext context) +48 BuildUp_ERegistrationModule.Data.ESubscriptionsManager(IBuilderContext ) +114 Telerik.Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlan.BuildUp(IBuilderContext context) +12 Telerik.Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) +195 Telerik.Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) +190 Telerik.Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable`1 resolverOverrides) +163 [ResolutionFailedException: Resolution of the dependency failed, type = "ERegistrationModule.Data.ESubscriptionsManager", name = "OpenAccessDataProvider". Exception occurred while: while resolving. Exception is: InvalidOperationException - The type String cannot be constructed. You must configure the container to supply this value. ----------------------------------------------- At the time of the exception, the container was: Resolving ERegistrationModule.Data.ESubscriptionsManager,OpenAccessDataProvider Resolving parameter "providerName" of constructor ERegistrationModule.Data.ESubscriptionsManager(System.String providerName, System.String transactionName) Resolving System.String,(none) ] Telerik.Sitefinity.Data.ManagerBase.GetManager(Type managerType, String providerName) +130 Telerik.Sitefinity.Data.ManagerBase.GetMappedManager(Type itemType, String providerName) +39 Telerik.Sitefinity.Web.UI.ContentUI.ContentView.ResolveContentManager() +234 Telerik.Sitefinity.Web.UI.ContentUI.ContentView.ResolveDetailItem() +76 Telerik.Sitefinity.Web.UI.ContentUI.ContentView.CreateChildControls() +35 System.Web.UI.Control.EnsureChildControls() +102 System.Web.UI.Control.PreRenderRecursiveInternal() +42 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496

Hello Anton,

This looks like you haven't registered your data provider in the configuration. This happens in the module configuration InitializeDefaultProviders as with the Products Module (ProductsConfig.cs). The whole module configuration is registered at the Initialize  method of the module -> Config.RegisterSection<ProductsConfig>();

All the best,
Nikolay Datchev
the Telerik team