listview binding selectedItems

Question

我可以綁定到ItemSource沒有問題。

我無法做的是帶回SelectedItems並讓它們顯示在listView中。

我希望能夠讓listView顯示檢查的項目，如果它在assignedChores集合中找到。我做錯了什麼？

<ListView x:Name="choreList" BorderBrush="White" BorderThickness="1"  
Margin="401,322,613,150" Grid.Row="1" DisplayMemberPath="Summary"  
ItemsSource="{Binding choreList, Mode=OneWay}"  
SelectedItem = "{Binding personSingle.assignedChores, Mode=TwoWay}"  
SelectionMode="Multiple" SelectionChanged="choreList_SelectionChanged"/> 

Answer 1

ListView具有SelectedItems財產是IList<T>類型，但它只是讀過，所以不能將其綁定。 SelectedItem可以綁定到object而不是List<T>。

您只有選項，您需要將ListViewItem的IsSelected屬性與ViewModel的屬性綁定。

public class MyListView : ListView 
{ 
    protected override void PrepareContainerForItemOverride(Windows.UI.Xaml.DependencyObject element, object item) 
    { 
     base.PrepareContainerForItemOverride(element, item); 
     ListViewItem listItem = element as ListViewItem;   
     Binding binding = new Binding(); 
     binding.Mode = BindingMode.TwoWay; 
     binding.Source = item; 
     binding.Path = new PropertyPath("IsSelectedFromViewModel"); 
     listItem.SetBinding(ListViewItem.IsSelectedProperty, binding); 
    } 
}