Windows Phone应用程序中成分的根在哪里？ [英] Where is the composition root in a Windows Phone app?

问题描述

我是WP 7的新手。出于依赖关系注入的目的，我希望遵循使用WinForms应用程序获得的实践。因此，我想在组成根目录下构建我的应用程序图。

I'm new to WP 7. For purposes of dependency injection, I want to adhere to practices acquired doing WinForms apps. I therefore want to build my app graph at the composition root. What part of a regular WP 7 app source code can be viewed as the composition root?

推荐答案

我喜欢的模式如图案和图片建议的那样实践团队是：

• 将 ViewModelLocator 类添加到您的资源 App.xaml 和 x：Key = ViewModelLocator ，并为该类添加每个ViewModel的属性


• 在应用程序构造函数中配置依赖项（App.xaml中的 App（） .cs）并将容器实例提供给 ViewModelLocator （通过 Application.Resources [ ViewModelLocator] ）


• 通过将 DataContext = {Binding ViewModelPropertyName，Source = {StaticResource ViewModelLocator}}
$绑定到每个页面的ViewModel b $ b

• Add a ViewModelLocator class to your resources App.xaml with an x:Key="ViewModelLocator", and add to that class a property for each ViewModel type and lazy-instantiates the VM using the container.
• Configure your dependencies in the application constructor (App() in App.xaml.cs) and provide the container instance to the ViewModelLocator (via Application.Resources["ViewModelLocator"])
• Bind the ViewModel to each page by assigning DataContext="{Binding ViewModelPropertyName, Source={StaticResource ViewModelLocator}}"

有关详细信息，请参见 WP7指南有效的实施。

See the WP7 Guide for a working implementation.

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