如何使用 mvvmlight 处理依赖注入

Question

我不知道如何在 MainWindowViewModel 的构造函数调用中注入参数。我想要的是在 viewmodellocator 中注册当前主窗口 (this) 的一个实例。我怎样才能做到这一点？

这是我在viewmodellocator中的情况class:

public ViewModelLocator()
{
    ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);

    //SimpleIoc.Default.Register<Window>();  //THIS IS NOT WORKING BECOUSE ITS A NEW INSTANCE, I NEED THE INSTANCE OF THE CURRENT MAINWINDOW HERE.
    SimpleIoc.Default.Register<MainWindowViewModel>();
}

主视图模型：

public MainWindowViewModel(Window window)
{
    this.Window = window;

    //Listen out for the window resizing
    this.Window.StateChanged += StateChanged;
}

MainWindow.xaml

DataContext="{Binding MainWindow, Source={StaticResource Locator}}"

Answer 1

如果您希望 Window 解析为您的 MainWindow：

public ViewModelLocator()
{
    ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);

    SimpleIoc.Default.Register<System.Windows.Window>(() => System.Windows.Application.Current.MainWindow as MainWindow);
    SimpleIoc.Default.Register<MainViewModel>();
}

另请注意，您应该在 XAML:

中仅绑定到 "Main"

DataContext="{Binding Main, Source={StaticResource Locator}}"

如何使用 mvvmlight 处理依赖注入

How to handle dependency injection with mvvmlight

wpf

dependency-injection

mvvm

mvvm-light

viewmodellocator