ItemsControl的绑定可见性

Question

我使用以下代码段绑定ItemsControl的可见性。

<ItemsControl x:Name="PART_ItemsControl"
        Margin="{Binding ExcelLikeFilterAdvVisibility, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource marginConverterForOldExcelLikeFiltering}, ConverterParameter=ItemsControl}"
        ItemsSource="{TemplateBinding ItemsSource}"
        Visibility="{Binding Path=Items.Count, UpdateSourceTrigger=PropertyChanged, Converter={StaticResource itemsSourceCountConverter}}">

由于此代码段，我在输出窗口中遇到以下错误。

错误：

System.Windows.Data Error: BindingExpression path error: 'Items' property not found on 'ToolTipsDemo.StocksViewModel' 'ToolTipsDemo.StocksViewModel' (HashCode=42842654). BindingExpression: Path='Items.Count' DataItem='ToolTipsDemo.StocksViewModel' (HashCode=42842654); target element is 'System.Windows.Controls.ItemsControl' (Name='PART_ItemsControl'); target property is 'Visibility' (type 'System.Windows.Visibility')..

Answer 1

Visibility="{Binding Path=Items.Count,
                     RelativeSource={RelativeSource Self},
                     UpdateSourceTrigger=PropertyChanged,
                     Converter={StaticResource itemsSourceCountConverter}}">