拖动多个GridViewItems抛出异常

当前我正在开发metro应用程序，其中包含与ObservableCollection约束的GridView。我的问题是，当我选择单个项目并拖放它时，它工作正常，但是当我选择多个项目并拖放时抛出异常。例外如下所示。拖动多个GridViewItems抛出异常

#if DEBUG && !DISABLE_XAML_GENERATED_BREAK_ON_UNHANDLED_EXCEPTION 
     UnhandledException += (sender, e) => 
     { 
      if (global::System.Diagnostics.Debugger.IsAttached) global::System.Diagnostics.Debugger.Break(); 
     }; 
#endif

我的xaml代码如下所示。

<GridView Name="searchPanelGrid" 
       SelectionMode="Multiple" 
       CanReorderItems="True" 
       AllowDrop="True" 
       CanDragItems="True" 
       HorizontalAlignment="Left" 
       ItemsSource="{Binding Source={StaticResource CollectionItems}}" 
       Grid.Row="2" 
       ItemContainerStyle="{StaticResource CustomGridViewItemStyle}" 
       ScrollViewer.VerticalScrollMode="Auto" 
       ScrollViewer.VerticalScrollBarVisibility="Auto" 
       SelectionChanged="searchPanelGrid_SelectionChanged" 
       Width="920" 
       Height="Auto" Grid.ColumnSpan="3"> 

     <GridView.ItemsPanel> 
      <ItemsPanelTemplate> 
       <WrapGrid Orientation="Horizontal"> 
       </WrapGrid> 
      </ItemsPanelTemplate> 
     </GridView.ItemsPanel> 

     <GridView.ItemTemplate> 
      <DataTemplate> 
      ............ 
      </DataTemplate> 
     <GridView.ItemTemplate>

我的容器风格如下。

<Style x:Key="CustomGridViewItemStyle" TargetType="GridViewItem"> 
    <Setter Property="FontFamily" Value="{StaticResource ContentControlThemeFontFamily}"/> 
    <Setter Property="FontSize" Value="{StaticResource ControlContentThemeFontSize}"/> 
    <Setter Property="Background" Value="Transparent"/> 
    <Setter Property="TabNavigation" Value="Local"/> 
    <Setter Property="IsHoldingEnabled" Value="True"/> 
    <Setter Property="Margin" Value="0,0,2,2"/> 
    <Setter Property="Template"> 
     <Setter.Value> 
      <ControlTemplate TargetType="GridViewItem"> 
       <Border x:Name="OuterContainer"> 
        <VisualStateManager.VisualStateGroups> 
         <VisualStateGroup x:Name="CommonStates"> 
          <VisualState x:Name="Normal"/> 
          <VisualState x:Name="PointerOver"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PointerOverBorder"/> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectionBackground"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="SelectedBorder"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="#CCC"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectedEarmark"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="#FF0C6EA6"/> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Pressed"> 
           <Storyboard> 
            <PointerDownThemeAnimation TargetName="ContentContainer"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PointerOverBorder"/> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectionBackground"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="SelectedBorder"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBorderThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectedEarmark"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="PointerOverPressed"> 
           <Storyboard> 
            <PointerDownThemeAnimation TargetName="ContentContainer"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PointerOverBorder"/> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectionBackground"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="SelectedBorder"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBorderThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="SelectedEarmark"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedPointerOverBackgroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Disabled"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="{StaticResource ListViewItemDisabledThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="contentPresenter"/> 
           </Storyboard> 
          </VisualState> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="FocusStates"> 
          <VisualState x:Name="Focused"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="FocusVisual"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Unfocused"/> 
          <VisualState x:Name="PointerFocused"/> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="SelectionHintStates"> 
          <VisualStateGroup.Transitions> 
           <VisualTransition GeneratedDuration="0:0:0.65" To="NoSelectionHint"/> 
          </VisualStateGroup.Transitions> 
          <VisualState x:Name="VerticalSelectionHint"> 
           <Storyboard> 
            <SwipeHintThemeAnimation ToHorizontalOffset="0" TargetName="SelectionBackground" ToVerticalOffset="15"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="0" TargetName="ContentBorder" ToVerticalOffset="15"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="0" TargetName="SelectedBorder" ToVerticalOffset="15"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="0" TargetName="SelectedCheckMark" ToVerticalOffset="15"/> 
            <DoubleAnimationUsingKeyFrames Duration="0:0:0.500" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyph"> 
             <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.5"/> 
             <DiscreteDoubleKeyFrame KeyTime="0:0:0.500" Value="0"/> 
            </DoubleAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="HorizontalSelectionHint"> 
           <Storyboard> 
            <SwipeHintThemeAnimation ToHorizontalOffset="-23" TargetName="SelectionBackground" ToVerticalOffset="0"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="-23" TargetName="ContentBorder" ToVerticalOffset="0"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="-23" TargetName="SelectedBorder" ToVerticalOffset="0"/> 
            <SwipeHintThemeAnimation ToHorizontalOffset="-23" TargetName="SelectedCheckMark" ToVerticalOffset="0"/> 
            <DoubleAnimationUsingKeyFrames Duration="0:0:0.500" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyph"> 
             <DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.5"/> 
             <DiscreteDoubleKeyFrame KeyTime="0:0:0.500" Value="0"/> 
            </DoubleAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="NoSelectionHint"/> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="SelectionStates"> 
          <VisualState x:Name="Unselecting"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyphBorder"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Unselected"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyphBorder"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="UnselectedPointerOver"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyphBorder"/> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="contentPresenter"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedForegroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="UnselectedSwiping"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="0.5" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectingGlyph"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyphBorder"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Selecting"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectionBackground"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedBorder"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectingGlyph"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HintGlyphBorder"/> 

           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="Selected"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectionBackground"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedBorder"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedCheckMark"/> 

           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="SelectedSwiping"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectionBackground"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedBorder"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedCheckMark"/> 
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="contentPresenter"> 
             <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListViewItemSelectedForegroundThemeBrush}"/> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="SelectedUnfocused"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedBorder"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="SelectedCheckMark"/> 
           </Storyboard> 
          </VisualState> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="DragStates"> 
          <VisualStateGroup.Transitions> 
           <VisualTransition GeneratedDuration="0:0:0.2" To="NotDragging"/> 
          </VisualStateGroup.Transitions> 
          <VisualState x:Name="NotDragging"/> 
          <VisualState x:Name="Dragging"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="{StaticResource ListViewItemDragThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="InnerDragContent"/> 
            <DragItemThemeAnimation TargetName="InnerDragContent"/> 
            <FadeOutThemeAnimation TargetName="SelectedCheckMarkOuter"/> 
            <FadeOutThemeAnimation TargetName="SelectedBorder"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="DraggingTarget"> 
           <Storyboard> 
            <DropTargetItemThemeAnimation TargetName="OuterContainer"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="MultipleDraggingPrimary"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="MultiArrangeOverlayBackground"/> 
            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="MultiArrangeOverlayText"/> 
            <DoubleAnimation Duration="0" To="{StaticResource ListViewItemDragThemeOpacity}" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ContentBorder"/> 
            <FadeInThemeAnimation TargetName="MultiArrangeOverlayBackground"/> 
            <FadeInThemeAnimation TargetName="MultiArrangeOverlayText"/> 
            <DragItemThemeAnimation TargetName="ContentBorder"/> 
            <FadeOutThemeAnimation TargetName="SelectionBackground"/> 
            <FadeOutThemeAnimation TargetName="SelectedCheckMarkOuter"/> 
            <FadeOutThemeAnimation TargetName="SelectedBorder"/> 
            <FadeOutThemeAnimation TargetName="PointerOverBorder"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="MultipleDraggingSecondary"> 
           <Storyboard> 
            <FadeOutThemeAnimation TargetName="ContentContainer"/> 
           </Storyboard> 
          </VisualState> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="ReorderHintStates"> 
          <VisualStateGroup.Transitions> 
           <VisualTransition GeneratedDuration="0:0:0.2" To="NoReorderHint"/> 
          </VisualStateGroup.Transitions> 
          <VisualState x:Name="NoReorderHint"/> 
          <VisualState x:Name="BottomReorderHint"> 
           <Storyboard> 
            <DragOverThemeAnimation Direction="Bottom" ToOffset="{StaticResource ListViewItemReorderHintThemeOffset}" TargetName="ReorderHintContent"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="TopReorderHint"> 
           <Storyboard> 
            <DragOverThemeAnimation Direction="Top" ToOffset="{StaticResource ListViewItemReorderHintThemeOffset}" TargetName="ReorderHintContent"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="RightReorderHint"> 
           <Storyboard> 
            <DragOverThemeAnimation Direction="Right" ToOffset="{StaticResource ListViewItemReorderHintThemeOffset}" TargetName="ReorderHintContent"/> 
           </Storyboard> 
          </VisualState> 
          <VisualState x:Name="LeftReorderHint"> 
           <Storyboard> 
            <DragOverThemeAnimation Direction="Left" ToOffset="{StaticResource ListViewItemReorderHintThemeOffset}" TargetName="ReorderHintContent"/> 
           </Storyboard> 
          </VisualState> 
         </VisualStateGroup> 
         <VisualStateGroup x:Name="DataVirtualizationStates"> 
          <VisualState x:Name="DataAvailable"/> 
          <VisualState x:Name="DataPlaceholder"> 
           <Storyboard> 
            <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Visibility" Storyboard.TargetName="PlaceholderTextBlock"> 
             <DiscreteObjectKeyFrame KeyTime="0"> 
              <DiscreteObjectKeyFrame.Value> 
               <Visibility>Visible</Visibility> 
              </DiscreteObjectKeyFrame.Value> 
             </DiscreteObjectKeyFrame> 
            </ObjectAnimationUsingKeyFrames> 
            <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Visibility" Storyboard.TargetName="PlaceholderRect"> 
             <DiscreteObjectKeyFrame KeyTime="0"> 
              <DiscreteObjectKeyFrame.Value> 
               <Visibility>Visible</Visibility> 
              </DiscreteObjectKeyFrame.Value> 
             </DiscreteObjectKeyFrame> 
            </ObjectAnimationUsingKeyFrames> 
           </Storyboard> 
          </VisualState> 
         </VisualStateGroup> 

        </VisualStateManager.VisualStateGroups> 
        <Grid x:Name="ReorderHintContent" Background="Transparent"> 
         <Path x:Name="SelectingGlyph" Data="F1 M133.1,17.9 L137.2,13.2 L144.6,19.6 L156.4,5.8 L161.2,9.9 L145.6,28.4 z" Fill="{StaticResource ListViewItemCheckSelectingThemeBrush}" FlowDirection="LeftToRight" HorizontalAlignment="Right" Height="13" Margin="0,9.5,9.5,0" Opacity="0" Stretch="Fill" VerticalAlignment="Top" Width="15"/> 
         <Border x:Name="HintGlyphBorder" HorizontalAlignment="Right" Height="40" Margin="4" Opacity="0" VerticalAlignment="Top" Width="40"> 
          <Path x:Name="HintGlyph" Data="F1 M133.1,17.9 L137.2,13.2 L144.6,19.6 L156.4,5.8 L161.2,9.9 L145.6,28.4 z" Fill="{StaticResource ListViewItemCheckHintThemeBrush}" FlowDirection="LeftToRight" HorizontalAlignment="Right" Height="13" Margin="0,5.5,5.5,0" Opacity="0" Stretch="Fill" VerticalAlignment="Top" Width="15"/> 
         </Border> 
         <Border x:Name="ContentContainer" BorderThickness="0"> 
          <Grid x:Name="InnerDragContent"> 
           <Rectangle x:Name="PointerOverBorder" Fill="#CCC" IsHitTestVisible="False" Opacity="0" Margin="4"/> 
           <Rectangle x:Name="FocusVisual" IsHitTestVisible="False" Opacity="0" Stroke="{StaticResource ListViewItemFocusBorderThemeBrush}" StrokeThickness="2"/> 
           <Rectangle x:Name="SelectionBackground" Fill="{StaticResource ListViewItemSelectedBackgroundThemeBrush}" Opacity="0"/> 
           <ContentPresenter x:Name="contentPresenter" ContentTransitions="{TemplateBinding ContentTransitions}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> 

           <TextBlock x:Name="PlaceholderTextBlock" Foreground="{x:Null}" IsHitTestVisible="False" Margin="{TemplateBinding Padding}" Text="Xg" Visibility="Collapsed"/> 

           <Rectangle x:Name="PlaceholderRect" Fill="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}" IsHitTestVisible="False" Visibility="Collapsed"/> 
           <Rectangle x:Name="MultiArrangeOverlayBackground" Fill="{StaticResource ListViewItemDragBackgroundThemeBrush}" IsHitTestVisible="False" Opacity="0"/> 
           <Rectangle x:Name="SelectedBorder" Margin="5" IsHitTestVisible="False" Opacity="0" Stroke="#CCC" StrokeThickness="1"/> 

           <Border x:Name="SelectedCheckMarkOuter" HorizontalAlignment="Right" IsHitTestVisible="False" Margin="0" VerticalAlignment="Top"> 
            <Grid x:Name="SelectedCheckMark" Height="40" Opacity="0" Width="40" Margin="5"> 
             <Path x:Name="SelectedEarmark" Data="M0,0 L40,0 L40,40 z" Fill="#FF0C6EA6" Stretch="Fill"/> 
             <Path Data="F1 M133.1,17.9 L137.2,13.2 L144.6,19.6 L156.4,5.8 L161.2,9.9 L145.6,28.4 z" Fill="{StaticResource ListViewItemCheckThemeBrush}" FlowDirection="LeftToRight" HorizontalAlignment="Right" Height="13" Margin="0,5.5,5.5,0" Stretch="Fill" VerticalAlignment="Top" Width="15"/> 
            </Grid> 
           </Border> 
           <TextBlock x:Name="MultiArrangeOverlayText" Foreground="{StaticResource ListViewItemDragForegroundThemeBrush}" FontSize="26.667" FontFamily="{StaticResource ContentControlThemeFontFamily}" IsHitTestVisible="False" Margin="18,9,0,0" Opacity="0" TextWrapping="Wrap" Text="{Binding TemplateSettings.DragItemsCount, RelativeSource={RelativeSource Mode=TemplatedParent}}" TextTrimming="WordEllipsis"/> 
          </Grid> 
         </Border> 
        </Grid> 
       </Border> 
      </ControlTemplate> 
     </Setter.Value> 
    </Setter> 
</Style>

为什么在多次拖动时会发生此异常？

来源

2013-12-10 Muhammad Umar

你没有发布最重要的部分 - 什么例外。在调试器中，查看异常文本并在此处发布所有可找到的信息 - 消息，可能是堆栈跟踪 – notacat

代码中的错误很可能会出现在您的视图模型中。但是你没有提供任何代码。再加上你的片段太大了，对它进行反向工程将是一个相当大的挑战。你能稍微解释一下你的问题吗？你有什么尝试？什么是错误信息？ –

为什么你失败了，我不知道。但让我至少向你证明，多个项目可以在GridView中拖放/重新排序。这应该给你一些希望。

使用此：

public class ViewModel 
{ 
    public ViewModel() 
    { 
     foreach (var item in Enumerable.Range(1, 50)) 
      this.Items.Add(item); 
    } 
    ObservableCollection<int> _Items = new ObservableCollection<int>(); 
    public ObservableCollection<int> Items { get { return _Items; } } 
}

试试这个：

<Grid Background="Black"> 

    <Grid.DataContext> 
     <local:ViewModel/> 
    </Grid.DataContext> 

    <GridView ItemsSource="{Binding Items}" 
       SelectionMode="Multiple" 
       AllowDrop="True" 
       CanDragItems="True" 
       CanReorderItems="True" /> 

</Grid>

祝您好运！

来源

2013-12-12 21:18:22

感谢您的回复。基本上问题在于我的自定义容器风格，我通过处理全局未处理的异常来解决问题，通过该异常我可以检测到问题的实际位置。再次感谢努力。 –

也许你想标记答案？ –

拖动多个GridViewItems抛出异常

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