为什么我注入的依赖对象在每个模块中不是同一个实例？

发布于 2024-07-27 15:01:32 字数 1047 浏览 4 评论 0原文

我正在使用 Prism 和 Unity。

我有这个 bootstrapper：

protected override IModuleCatalog GetModuleCatalog()
{
    ModuleCatalog catalog = new ModuleCatalog()
        .AddModule(typeof(CustomerModule.CustomerModule))
        .AddModule(typeof(EmployeesModule.EmployeesModule))
        .AddModule(typeof(MenuModule.MenuModule));
    return catalog;
}

我的 CustomerModule 注入了 MenuManager 并向其添加菜单项：

public void Initialize()
{
    menuManager.MenuItems.Add("Customers");
    menuManager.MenuItems.Add("Other Customers");
}

但是当我的 MainMenuPresenter 对象也获取 MenuManager 时注入，它不是同一个对象：

public MainMenuPresenter(MainMenuView view, MenuManager menuManager)
{
    View = view;
    View.DataContext = this;

    foreach (string menuItemTitle in menuManager.MenuItems)
    {
        MenuItems.Add(menuItemTitle);
    }
}

我如何告诉 Prism/Unity 我希望注入的 MenuManager 成为 Singleton，以便将相同的对象注入到我的每个模块和对象中？

原文

I'm using Prism and Unity.

I've got this bootstrapper:

protected override IModuleCatalog GetModuleCatalog()
{
    ModuleCatalog catalog = new ModuleCatalog()
        .AddModule(typeof(CustomerModule.CustomerModule))
        .AddModule(typeof(EmployeesModule.EmployeesModule))
        .AddModule(typeof(MenuModule.MenuModule));
    return catalog;
}

And my CustomerModule gets a MenuManager injected and adds menu items to it:

public void Initialize()
{
    menuManager.MenuItems.Add("Customers");
    menuManager.MenuItems.Add("Other Customers");
}

But when my MainMenuPresenter object also gets MenuManager injected, it is not the same object:

public MainMenuPresenter(MainMenuView view, MenuManager menuManager)
{
    View = view;
    View.DataContext = this;

    foreach (string menuItemTitle in menuManager.MenuItems)
    {
        MenuItems.Add(menuItemTitle);
    }
}

How do I tell Prism/Unity that I want the injected MenuManager to be a Singleton so that the same object is injected into each of my modules and objects?

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渔村楼浪 2024-08-03 15:01:32

使用 Unity，您可以这样做（取自 MSDN on Lifetime Managers in Unity< /a>):

// Register a type to have a singleton lifetime without mapping the type
// Uses the container only to implement singleton behavior
myContainer.RegisterType<MySingletonObject>(new ContainerControlledLifetimeManager());
// Following code will return a singleton instance of MySingletonObject
// Container will take over lifetime management of the object
myContainer.Resolve<MySingletonObject>();

Using Unity, you do it like this (taken from MSDN on Lifetime Managers in Unity):

// Register a type to have a singleton lifetime without mapping the type
// Uses the container only to implement singleton behavior
myContainer.RegisterType<MySingletonObject>(new ContainerControlledLifetimeManager());
// Following code will return a singleton instance of MySingletonObject
// Container will take over lifetime management of the object
myContainer.Resolve<MySingletonObject>();

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