如何將我的ListBox中的CheckBox設置爲禁用

Question

如何將我的ListBox中的CheckBox設置爲禁用？

XAML：

<GroupBox Header="A GroupBox" BorderThickness="2" Width="247" HorizontalAlignment="Left" VerticalAlignment="Top" Height="183" Margin="405,155,0,0"> 
    <Grid> 
     <ListBox Name="MyListBoxThing" ItemsSource="{Binding MyItemsClassThing}" Height="151" Width="215" HorizontalAlignment="Left" VerticalAlignment="Top" ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.HorizontalScrollBarVisibility="Auto" Margin="10,0,0,0"> 
      <ListBox.ItemTemplate> 
       <DataTemplate> 
        <StackPanel Orientation="Horizontal"> 
         <CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" /> 
         <TextBlock Text="{Binding Path=Name}"/> 
        </StackPanel> 
       </DataTemplate> 
      </ListBox.ItemTemplate> 
     </ListBox> 
    </Grid> 
</GroupBox> 

Mainwindow.xaml.cs

public class MyItemsClassThing 
{ 
    public string Name { get; set; } 
    public bool IsSelected { get; set; } 
} 

的問題：我試圖禁用我的CheckBox的動態是我的列表框的裏面。但是，當我禁用列表框時，它也禁用了我的垂直滾動條。所以現在我想我應該訪問我的GroupBox裏面的列表框內的CheckBox，然後逐個禁用它們。我怎樣才能做到這一點？

我想這一點，但沒有運氣：

var children = LogicalTreeHelper.GetChildren(MyListBoxThing); 
foreach(var item in children) 
{ 
    var c = item as CheckBox; 
    c.IsEnabled = false; 
} 

我想說這樣的：

loop through the listbox 
    if you find a check box 
     checkbox.isenabled = false 
    endif 
end 

在此先感謝

Answer 1

不應該將IsEnabled屬性添加到您的MyItemsClassThing並實施INotifyPropertyChanged接口：

public class MyItemsClassThing : INotifyPropertyChanged 
{ 
    public string Name { get; set; } 
    public bool IsSelected { get; set; } 

    private bool _isEnabled = true; 
    public bool IsEnabled 
    { 
     get { return _isEnabled; } 
     set { _isEnabled = value; OnPropertyChanged(); } 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 
    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null) 
    { 
     PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); 
    } 
} 

而且CheckBox的IsEnabled屬性綁定到這個屬性：

<CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" IsEnabled="{Binding IsEnabled}" /> 

您可以簡單地設置您的源集合中的MyItemsClassThing對象的IsEnabled屬性，以停用Checkbox：

foreach(var item in MyListBoxThing.Items.OfType<MyItemsClassThing>()) 
{ 
    item.IsEnabled = false; 
}