MvvmLightLibsStd10和UWP [英] MvvmLightLibsStd10 and UWP

问题描述

如何在ViewModel和View之间创建绑定?

How can you create a binding between a ViewModel and a View?

过去，在App.xaml中创建了一个Locater，然后在视图上显示以下内容:

In the past there was a Locater created in App.xaml and then on the view you had this:

DataContext="{Binding MainViewModel, Source={StaticResource ViewModelLLocator}}"

我什至不能单击视图"的属性"，然后创建DataContext绑定.

I can't even click in the Properties of the View and then create DataContext binding.

推荐答案

在MVVM light的最新版本中，由于ViewModelLocator依赖于Microsoft.Practices.ServiceLocation并且前者不符合.NET Standard，因此它们更改了ViewModelLocator的工作方式.现在，它应该使用GalaSoft.MvvmLight.Ioc使用SimpleIoc定位ViewModel.

In recent versions of MVVM light they changed how ViewModelLocator works due to it taking a dependency on Microsoft.Practices.ServiceLocation and the former not being .NET Standard compliant. It now should use GalaSoft.MvvmLight.Ioc to locate the ViewModel using SimpleIoc.

这是我在最近的UWP项目中如何使用它的一个示例.

Here's an example how I used it in a recent UWP project.

在App.xaml中

private ViewModels.ViewModelLocator Locator => Application.Current.Resources["Locator"] as ViewModels.ViewModelLocator;

在MainPage.xaml中

In MainPage.xaml

DataContext="{Binding MainViewModel, Source={StaticResource Locator}}">

在MainPage.cs

In MainPage.cs

private MainViewModel ViewModel
{
    get { return DataContext as MainViewModel; }
}

在ViewModelLocator.cs

In ViewModelLocator.cs

namespace YourNamespace.ViewModels
{
    public class ViewModelLocator
    {
        public ViewModelLocator()
        {                      
            Register<MainViewModel, MainPage>();            
        }

        public MainViewModel MainViewModel => SimpleIoc.Default.GetInstance<MainViewModel>();

        public void Register<VM, V>()
            where VM : class
        {
            SimpleIoc.Default.Register<VM>();

            NavigationService.Configure(typeof(VM).FullName, typeof(V));
        }
    }
}

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