C# 棱镜&x2B；MEF——Can'；无法使区域正常工作

Prismv4和MEF有点新

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

我通过快速入门，并试图将其中两个结合在一起，但我似乎无法让它工作

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

首先，我有一个引导程序来加载Shell窗口

public sealed class ClientBootstrapper : MefBootstrapper
{
    protected override void ConfigureAggregateCatalog()
    {
        base.ConfigureAggregateCatalog();

        //Add this assembly to export ModuleTracker (Shell is in this Assembly).
        AggregateCatalog.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly()));
    }

    protected override DependencyObject CreateShell()
    {
        return Container.GetExportedValue<Shell>();
    }

    protected override void InitializeShell()
    {
        base.InitializeShell();

        Application.Current.MainWindow = (Window)Shell;
        Application.Current.MainWindow.Show();
    }
}

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

---

HelloWorld视图（只是一个包含TextBlock的简单UserControl）没有加载到区域中！我想我对如何在我的地区加载有些迷茫。

根据您共享的信息很难判断出哪里出了问题。

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

---

我建议看一下PRISM4附带的示例和参考实现。我想参考实现和一点调试应该可以帮助您找到问题。

看起来您正在尝试使用视图发现方法

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

您是否尝试过以下方法：

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

    [ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    private IRegionManager regionManager;      

    [ImportingConstructor]
    public HelloWorldModule(IRegionManager regionManager)
    {
        this.regionManager = regionManager;
    } 

    public void Initialize()
    {
        this.regionManager.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

---

引导程序中的
ConfigureAggregateCatalog
方法需要添加
视图中的程序集。将下面的行添加到方法的末尾应该可以解决当前的问题

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

this.AggregateCatalog.Catalogs.Add(new AssemblyCatalog(typeof(Views.HelloWorld).Assembly));

这也可以在
ModuleCatalog
中的
XAML
中完成

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

您的
视图。HelloWorld
类还需要添加
[Export]
属性。
公共类模块c:IModule
[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

public class ModuleC : IModule
{
    #region IModule Members

    /// <summary>
    /// Initializes the module.
    /// </summary>
    public void Initialize()
    {
        /* We register always-available controls with the Prism Region Manager, and on-demand 
         * controls with the DI container. On-demand controls will be loaded when we invoke
         * IRegionManager.RequestNavigate() to load the controls. */

        // Register task button with Prism Region
        var regionManager = ServiceLocator.Current.GetInstance<IRegionManager>();
        regionManager.RegisterViewWithRegion("TaskButtonRegion", typeof(ModuleBTaskButton));

        /* View objects have to be registered with Unity using the overload shown below. By
         * default, Unity resolves view objects as type System.Object, which this overload 
         * maps to the correct view type. See "Developer's Guide to Microsoft Prism" (Ver 4), 
         * p. 120. */

        // Register other view objects with DI Container (Unity)
        var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
        container.RegisterType<Object, ModuleBRibbonTab>("ModuleBRibbonTab");
        container.RegisterType<Object, ModuleBNavigator>("ModuleBNavigator");
        container.RegisterType<Object, ModuleBWorkspace>("ModuleBWorkspace");
    }
}

{
#区域模块成员
/// 
///初始化模块。
/// 
公共无效初始化（）
{
/*我们向Prism区域管理器和按需注册始终可用的控件
*带有DI容器的控件。当我们调用
*用于加载控件的IRegionManager.RequestNavigate（）*/
//用棱镜区域注册任务按钮
var regionManager=ServiceLocator.Current.GetInstance（）；
regionManager.RegisterViewWithRegion（“TaskButtonRegion”，typeof（ModuleTaskButton））；
/*视图对象必须使用如下所示的重载向Unity注册
*默认情况下，Unity将视图对象解析为System.Object类型，此重载
*映射到正确的视图类型。请参阅“Microsoft Prism开发人员指南”（第4版），
*第120页*/
//向DI容器（Unity）注册其他视图对象
var container=ServiceLocator.Current.GetInstance（）；
container.RegisterType（“ModuleBRibbonTab”）；
container.RegisterType（“ModuleBNavigator”）；
container.RegisterType（“ModuleBWorkspace”）；
}
}
您可以试试这个，它对我有效，模块类如下：

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

[ModuleExport(typeof(HelloWorldModule))]
public class HelloWorldModule : IModule
{

    [Import]
    private IRegionManager regionManager;

    public void Initialize()
    {
        Uri viewNav = new Uri("HelloWorldView", UriKind.Relative);
        regionManager.RequestNavigate("PrimaryRegion", viewNav);
    }
}

[Export("HelloWorldView")]
[PartCreationPolicy(CreationPolicy.Shared)]
public partial class HelloWorldView : UserControl
{
    public HelloWorldView()
    {
        InitializeComponent();
    }
}

视图类如下所示：

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

[ModuleExport(typeof(HelloWorldModule))]
public class HelloWorldModule : IModule
{

    [Import]
    private IRegionManager regionManager;

    public void Initialize()
    {
        Uri viewNav = new Uri("HelloWorldView", UriKind.Relative);
        regionManager.RequestNavigate("PrimaryRegion", viewNav);
    }
}

[Export("HelloWorldView")]
[PartCreationPolicy(CreationPolicy.Shared)]
public partial class HelloWorldView : UserControl
{
    public HelloWorldView()
    {
        InitializeComponent();
    }
}

HelloWorldView中的xaml

[ModuleExport(typeof(HelloWorldModule), InitializationMode = InitializationMode.OnDemand)]
public class HelloWorldModule : IModule
{
    [Import(AllowRecomposition = true)]
    private IRegionViewRegistry regionViewRegistry;

    [ImportingConstructor()]
    public HelloWorldModule(IRegionViewRegistry registry)
    {
        this.regionViewRegistry = registry;
    }

    public void Initialize()
    {
        regionViewRegistry.RegisterViewWithRegion("PrimaryRegion", typeof(Views.HelloWorldView));
    }
}

<UserControl x:Class="HelloWorldModule.HelloWorldView"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300">
<Grid>
    <TextBlock>Hello World</TextBlock>
</Grid>
</UserControl>

这篇文章的“答案”部分在哪里？这个问题是关于MEF实现的。不幸的是，这里提供的答案是使用统一。