c# – 将WrapPanel虚拟化为ListView的ItemsTemplate

可选：当ListView没有准备好时,我希望在ListView上显示一个文本(或可能的ProgressBar)并说出“Please Wait …”或“Loading Items …”之类的内容.

XAML：

<ListView x:Name="MyListView" VirtualizingPanel.IsVirtualizing="True" VirtualizingPanel.VirtualizationMode="Recycling" HorizontalAlignment="Left"  Height="577" VerticalAlignment="Top" Width="902" ScrollViewer.HorizontalScrollBarVisibility="Auto" Foreground="Black" Margin="10,10,0" ScrollViewer.CanContentScroll="True" BorderBrush="#FFC54B4B" BorderThickness="3" Background="White">
                    <ListView.ItemsPanel>
                        <ItemsPanelTemplate>
                            <WrapPanel MaxWidth="{Binding (FrameworkElement.ActualWidth),RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}"
                                ItemWidth="{Binding (ListView.View).ItemWidth,RelativeSource={RelativeSource AncestorType=ListView}}"
                                MinWidth="{Binding ItemWidth,RelativeSource={RelativeSource Self}}"
                                ItemHeight="{Binding (ListView.View).ItemHeight,RelativeSource={RelativeSource AncestorType=ListView}}" />
                        </ItemsPanelTemplate>
                    </ListView.ItemsPanel>
</ListView>

编辑：

我试过这个：

List<something> MyList = new List<something>(); 

ThreadPool.QueueUserWorkItem(_ =>
      {

          ( Create MyList here...)

          Dispatcher.BeginInvoke(new Action(() =>
          {
              MyListView.ItemsSource = MyList;
          }));
      });

在ListView准备好之前,主窗口仍然没有响应.