Question

我有一个定义了Itemssource的ListBox：

 <ListBox
    x:Name="ModuleListBox"
    DockPanel.Dock="Top"
    ItemsSource="{Binding MenuItems}">
    <ListBox.ItemContainerStyle>
       <Style TargetType="ListBoxItem">
           <Setter Property="IsSelected" Value="{Binding IsSelected}" />
       </Style>
   </ListBox.ItemContainerStyle>
 </ListBox>

我的MenuItems ViewModel实现了INotifyChanged接口，如下所示：

public class MenuItemViewModel : BaseViewModel
{
    private bool isSelected;
    public bool IsSelected 
    { 
        get { return isSelected; }  
        set { SetProperty(ref isSelected, value); } 
    }
}

我的列表框所在的视图的ViewModel如下所示：

public class ShellViewModel : BaseViewModel
{
    public ObservableCollection<MenuItemViewModel> MenuItems
    {
        get { return menuItems; }
        set { SetProperty(ref menuItems, value); }
    }
}

我的问题是如何将ListBoxItem的IsSelected属性绑定到MenuItemViewModel项目对象的Selected属性？

Answer 1

<ListBox
    x:Name="ModuleListBox"
    DockPanel.Dock="Top"
    ItemsSource="{Binding MenuItems}">
    <ListBox.ItemContainerStyle>
       <Style TargetType="ListBoxItem">
           <Setter Property="IsSelected" Value="{Binding RelativeSource={RelativeSource Self}, Path=DataContext.IsSelected}" />
       </Style>
   </ListBox.ItemContainerStyle>
 </ListBox>

Answer 2

设置列表框的选定项目道具

    SelectedItem="{Binding Path=SelectedMenuItem, Mode=TwoWay}"

还在ShellViewModel中创建SelectedMenuItem

ListBox中的SelectedItem不是布尔值，所以如果你真的想将它绑定到menuitem，那么你必须编写你的IValueConvertor。

将ListBoxItem的IsSelected属性绑定到Itemssource的DataContext

2 个答案: