CREATING VIEWMODEL TO VIEW MAPPINGS

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本文介绍了一种在WPF应用程序中使用数据模板创建视图和视图模型对的方法。通过这种方式可以方便地将ViewModel实例渲染为对应的View，特别是在无法直接添加静态XAML资源的情况下提供了解决方案。

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One of my favorite approaches to creating View/ViewModel pairs in WPF it to use data templates. Say you have a ViewModel called MyViewModel and it should be displayed in the UI as the View MyView.

We can create a fairly straightforward DataTemplate defined as:

<DataTemplate DataType="{x:Type local:MyViewModel}">
  <local:MyView />
</DataTemplate>

Whenever we add the ViewModel instance into a Window or a ContentControl, it will render using the DataTemplate, which just happens to be the View.

If we ever run into a dynamic scenario in which we are unable to easily add static XAML as a resource dictionary into an existing resource dictionary, as we might in a Prism module scenario, we can use the following method instead. Just declare it in our MainWindow or Application and expose it through an interface inside that can be accessed through a service container.

 
    public void RegisterViewModelToViewMapping<tviewmodel, tview="">()  
 {  
     DataTemplate template = new DataTemplate(typeof(TViewModel));  
     template.VisualTree = new FrameworkElementFactory(typeof(TView));  
   
     DataTemplateKey key = new DataTemplateKey(typeof(TViewModel));  
     Resources.Add(key, template);  
 }  
 
  