Binding to CurrentItem in a ItemsControl

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难免孤独
难免孤独 2021-01-20 07:32

The XAML below is basically trying to make a list of Buttons (rendered from the Name property of objects in the Views collection in th

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  •  半阙折子戏
    2021-01-20 08:19

    Your button does nothing. Usually your ViewModel would have an ICommand called Select (or something similar) that the Button would be bound against

    Command="{Binding Select, ElementName="root"}"

    and you'd pass the instance to the ICommand that you'd like to select

    CommandParameter="{Binding}"

    It would look something like this (c#/XAML like pseudocode):

    public class MyModel { public string Name {get;set;} }
    
    public class MyViewModel
    {
      public ObservableCollection Models {get;set;}
      public ICommand Select {get;set;}
      /* configure Models and Select etc */
    }
    
    
    
      
        
          

    The ItemsControl binds to Models, so each MyModel in Models gets a button. The button text is bound to the property Name. The button command is bound to the Select property in the ViewModel. When the button is pressed, it calls the ICommand, sending in the instance of MyModel that the button is bound against.

    Please do note that using ViewModels within a UserControl is a code smell. UserControls should appear to users as all other controls--they should have bindable public properties which are bound to the user's ViewModel, not yours. You then bind to the values of these properties within the UserControl. For this example, you would have an ItemsSource property defined on your UserControl, and the ItemsControl would bind to this property rather than a ViewModel directly.

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