小贝子编程

如果我插入断点，调试器根本不命中模块，则不会命中任何内容并给我一个错误



我面临问题（重要的是要注意调试器没有命中CivicaHousingRepairsModule。。。。如果我在第一行插入断点。。。没有命中任何内容。）自从过去两天没有任何线索我使用Silverlight 4、PRISM 4.0和MEF创建了示例应用程序。其中包括两个模块，如下所示。

//Module 1
namespace Civica.Housing.Security
{
    [ModuleExport(typeof(CivicaHousingSecurityModule),InitializationMode = InitializationMode.OnDemand)]
    public class CivicaHousingSecurityModule:IModule
    {
         private readonly IRegionManager _regionManager;
         [ImportingConstructor] //MEF magic to for resolving all the DI
         public CivicaHousingSecurityModule(IRegionManager regionManager, IAuthenticationService authenticationService)
         {
             regionManager.CheckForNull("regionManager");
             _regionManager = regionManager;
         }
         #region IModule Implementation
         public void Initialize()
         {
         } 
         #endregion
    }
}
//Module 2
namespace Civica.Housing.Repairs
{
    [ModuleExport(typeof(CivicaHousingRepairsModule), InitializationMode = InitializationMode.OnDemand)]
    public class CivicaHousingRepairsModule : IModule
    {
        private readonly IRegionManager _regionManager;
        #region Constructor
        [ImportingConstructor] 
        public CivicaHousingRepairsModule(IRegionManager regionManager, IAuthenticationService authenticationService)
        {
            regionManager.CheckForNull("regionManager");
            _regionManager = regionManager;
        }
        #endregion
        #region IModule Implementation
        public void Initialize()
        {
            _regionManager.RegisterViewWithRegion(RegionNames.ContentRegion, typeof(TestView));
        }
        #endregion
    }
}

下面是正则字符串模块（ModuleCatalog.xaml）的代码

<Modularity:ModuleCatalog xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
                          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
                          xmlns:sys="clr-namespace:System;assembly=mscorlib" 
                          xmlns:Modularity="clr-
namespace:Microsoft.Practices.Prism.Modularity;assembly=Microsoft.Practices.Prism">
    <Modularity:ModuleInfo Ref="Civica.Housing.Security.xap" InitializationMode="OnDemand" 
ModuleName="CivicaHousingSecurityModule" />
    <Modularity:ModuleInfo Ref="Civica.Housing.Repairs.xap" InitializationMode="OnDemand" 
ModuleName="CivicaHousingRepairsModule" />
</Modularity:ModuleCatalog>

下面是引导程序的代码

 public class CivicaHousingBootstrapper : MefBootstrapper
    {
        private const string ModuleCatalogUri = 
"/Civica.Housing.App;component/ModulesCatalog.xaml";
.
.
.
 protected override Microsoft.Practices.Prism.Modularity.IModuleCatalog CreateModuleCatalog()
        {
            var moduleCatalog=Microsoft.Practices.Prism.Modularity.ModuleCatalog.CreateFromXaml
(new Uri(ModuleCatalogUri,

UriKind.Relative));
            return moduleCatalog;            
        }
.
.
.
}

问题：

当我从一个模块（安全）导航到另一个模块时（维修），它会给我以下错误

Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 
2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; 
Tablet PC 2.0)
Timestamp: Wed, 22 Feb 2012 13:18:00 UTC
Message: Unhandled Error in Silverlight Application 
Code: 4004    
Category: ManagedRuntimeError   
Message: Microsoft.Practices.Prism.Modularity.ModuleInitializeException: An exception 
occurred while initializing module 'CivicaHousingRepairsModule'. 
    - The exception message was: The composition remains unchanged. The changes were rejected 
because of the following error(s): The composition produced multiple composition errors, with 3 
root causes. The root causes are provided below. Review the CompositionException.Errors property 
for more detailed information.
1) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.DashboardViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.DashboardViewModel'.
Element: Civica.Housing.Security.ViewModels.DashboardViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.DashboardViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
2) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.ShortcutViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.ShortcutViewModel'.
Element: Civica.Housing.Security.ViewModels.ShortcutViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.ShortcutViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
3) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.HeaderViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.HeaderViewModel'.
Element: Civica.Housing.Security.ViewModels.HeaderViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.HeaderViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
    Check the InnerException property of the exception for more information. If the exception 
occurred 
    while creating an object in a DI container, you can exception.GetRootException() to help 
locate the 
    root cause of the problem.  ---> System.ComponentModel.Composition.ChangeRejectedException: 
The composition remains unchanged. The changes were rejected because of the following error(s): 
The composition produced multiple composition errors, with 3 root causes. The root causes are 
provided below. Review the CompositionException.Errors property for more detailed information.
1) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.DashboardViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.DashboardViewModel'.
Element: Civica.Housing.Security.ViewModels.DashboardViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.DashboardViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
2) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.ShortcutViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.ShortcutViewModel'.
Element: Civica.Housing.Security.ViewModels.ShortcutViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.ShortcutViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
3) More than one export was found that matches the constraint '((exportDefinition.ContractName == 
"Civica.Housing.Services.IRepairsDataService") AndAlso (exportDefinition.Metadata.ContainsKey
("ExportTypeIdentity") AndAlso "Civica.Housing.Services.IRepairsDataService".Equals
(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'.
Resulting in: Cannot set import 'Civica.Housing.Security.ViewModels.HeaderViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService")' 
on part 'Civica.Housing.Security.ViewModels.HeaderViewModel'.
Element: Civica.Housing.Security.ViewModels.HeaderViewModel..ctor 
(Parameter="_iRepairsDataService", ContractName="Civica.Housing.Services.IRepairsDataService") 
-->  Civica.Housing.Security.ViewModels.HeaderViewModel -->  AssemblyCatalog 
(Assembly="Civica.Housing.Security, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")
   at System.ComponentModel.Composition.CompositionResult.ThrowOnErrors(AtomicComposition 
atomicComposition)
   at System.ComponentModel.Composition.Hosting.ExportProvider.OnExportsChanging
(ExportsChangeEventArgs e)
   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.OnCatalogChanging(Object 
sender, ComposablePartCatalogChangeEventArgs e)
   at System.ComponentModel.Composition.Hosting.ComposablePartCatalogCollection.OnChanging(Object 
sender, ComposablePartCatalogChangeEventArgs e)
   at System.ComponentModel.Composition.Hosting.AggregateCatalog.OnChanging
(ComposablePartCatalogChangeEventArgs e)
   at 
System.ComponentModel.Composition.Hosting.ComposablePartCatalogCollection.RaiseChangingEvent
(Lazy`1 addedDefinitions, Lazy`1 removedDefinitions, AtomicComposition atomicComposition)
   at System.ComponentModel.Composition.Hosting.ComposablePartCatalogCollection.Add
(ComposablePartCatalog item)
   at Microsoft.Practices.Prism.MefExtensions.Modularity.MefModuleInitializer.CreateModule
(ModuleInfo moduleInfo)
   at Microsoft.Practices.Prism.Modularity.ModuleInitializer.Initialize(ModuleInfo moduleInfo)
   --- End of inner exception stack trace ---
   at Microsoft.Practices.Prism.Modularity.ModuleInitializer.HandleModuleInitializationError
(ModuleInfo moduleInfo, String assemblyName, Exception exception)
   at Microsoft.Practices.Prism.Modularity.ModuleInitializer.Initialize(ModuleInfo moduleInfo)
   at Microsoft.Practices.Prism.Modularity.ModuleManager.InitializeModule(ModuleInfo moduleInfo)
   at Microsoft.Practices.Prism.Modularity.ModuleManager.LoadModulesThatAreReadyForLoad()
   at Microsoft.Practices.Prism.Modularity.ModuleManager.IModuleTypeLoader_LoadModuleCompleted
(Object sender, LoadModuleCompletedEventArgs e)
   at 
Microsoft.Practices.Prism.MefExtensions.Modularity.MefXapModuleTypeLoader.RaiseLoadModuleComplete
d(LoadModuleCompletedEventArgs e)
   at 
Microsoft.Practices.Prism.MefExtensions.Modularity.MefXapModuleTypeLoader.RaiseLoadModuleComplete
d(ModuleInfo moduleInfo, Exception error)
   at 
Microsoft.Practices.Prism.MefExtensions.Modularity.MefXapModuleTypeLoader.HandleDownloadCompleted
(DeploymentCatalog deploymentCatalog, AsyncCompletedEventArgs e)
   at 
Microsoft.Practices.Prism.MefExtensions.Modularity.MefXapModuleTypeLoader.DeploymentCatalog_Downl
oadCompleted(Object sender, AsyncCompletedEventArgs e)
   at System.ComponentModel.Composition.Hosting.DeploymentCatalog.OnDownloadCompleted
(AsyncCompletedEventArgs e)
   at System.ComponentModel.Composition.Hosting.DeploymentCatalog.HandleOpenReadCompleted(Object 
sender, OpenReadCompletedEventArgs e)
   at System.Net.WebClient.OnOpenReadCompleted(OpenReadCompletedEventArgs e)
   at System.Net.WebClient.OpenReadOperationCompleted(Object arg)     
Line: 56
Char: 13
Code: 0
URI: http://localhost:61228/Civica.Housing.aspx

重要提示：如果我插入，调试器根本不会命中CivicaHousingRepairsModule

第一行中的断点没有命中任何内容。

我尝试了以下：1.我已经将所有PRISM dll的localcopy设置为false。

如果你遇到同样的问题，并且你有很好的解决方案，请告诉我。如果你有答案或建议，我们将不胜感激。

我认为它的becoz-ur-xap文件不存在或格式已损坏。请从web项目中删除所有的xap文件，然后逐个模块重建应用程序，然后尝试运行应用程序

在模块项目中，必须为所有Prism引用配置CopyLocal='false'，否则，在MainProject中，应为CopyLocal='true'。它对我有效。

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