如果我插入断点，调试器根本不会命中模块，不会命中任何内容并给出错误

Question

我遇到了问题（重要的是要注意调试器没有命中 CivicaHousingRepairsModule 根本...如果我在第一行插入断点...什么都不会被击中。）自过去 2 天以来没有任何线索。 我使用 Silverlight 4、PRISM 4.0 和 MEF 创建了示例应用程序。其中包含两个模块，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
    }
}

现在以下是 regestring 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>

现在以下是Bootstrapper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（修复）时，它会给我以下错误 strong>

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： 调试器根本不会命中 CivicaHousingRepairsModule 如果我

在第一行插入断点，则不会命中任何内容。

我尝试了以下操作： 1. 我已将所有 PRISM dll 的 localcopy 设置为 false。

如果您遇到同样的问题并且有好的解决方案，请告诉我。您的回答或建议将不胜感激。

Answer 1

我认为它是因为您的 xap 文件不存在或格式损坏。请从 Web 项目中删除您的所有 xap 文件，然后逐个模块重建您的应用程序，然后尝试运行您的应用程序

Answer 2

在您的模块项目中，您必须为所有 Prism 引用配置 CopyLocal = 'false'，否则，在 MainProject 中，应为 CopyLocal= 'true'。
这对我有用。