Question

如何将我的ListBox中的CheckBox设置为禁用？

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; }
}

问题：我正在尝试禁用列表框内的CheckBox的动态。但是当我禁用ListBox时，它也会禁用我的垂直滚动条。所以现在我想我应该访问GroupBox里面的Listbox里面的CheckBox，然后逐个禁用它们。我怎么能这样做？

我试过了，但没有运气：

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

我想说：

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

提前致谢

Answer 1

您应该向IsEnabled添加MyItemsClassThing属性并实施INotifyPropertyChanged界面：

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));
    }
}

并将IsEnabled的{{1}}属性绑定到此属性：

CheckBox

您只需设置源集合中<CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" IsEnabled="{Binding IsEnabled}" />个对象的IsEnabled属性即可禁用MyItemsClassThing：

Checkbox

如何将我的ListBox中的CheckBox设置为禁用

1 个答案: