ListBoxは長いListBoxItemにスクロールできません

Question

ListBoxItemが非常に長い場合、ListBoxはListBoxItemの最後までスクロールできない問題が発生しているWPFで作業しています。私はListBoxは、テキストを表示するには、スクロールダウンできるかどうかを確認するために、非常に長いテキストの末尾に123を入れ

<Grid> 
    <ListBox ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Disabled"> 
     <ListBoxItem> 
      <TextBlock Text="abc"/> 
     </ListBoxItem> 
     <ListBoxItem> 
      <TextBlock Text="VerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylong123" TextWrapping="Wrap"/> 
     </ListBoxItem> 
    </ListBox> 
</Grid> 

注意：以下のコードです。しかし、これは私がスクロールダウンしたときに、私が見たものである。

私は（TextBlock「の末尾に「123」を参照してください）さらに低いスクロールすることができるようにするために何をすべき

も、私はListBoxItem/Textを指したときにスクロールすることができるように、マウスのホイールを持っていると思い

Answer 1

をあなたは自分のListBoxScrollViewerの内側に配置する必要があります。

<ScrollViewer> 
    <ListBox ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Disabled"> 
     <ListBoxItem> 
      <TextBlock Text="abc"/> 
     </ListBoxItem> 
     <ListBoxItem> 
      <TextBlock Text="VerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylong123" TextWrapping="Wrap"/> 
     </ListBoxItem> 
    </ListBox> 
</ScrollViewer> 

編集：あなたのマウスホイールのスクロールは、このようなあなたのScrollViewerにPreviewMouseWheelイベントを追加したい場合は、次の

<ScrollViewer PreviewMouseWheel="UIElement_OnPreviewMouseWheel"> 

そして：

private void UIElement_OnPreviewMouseWheel(object sender, MouseWheelEventArgs e) 
{ 
    ScrollViewer scv = (ScrollViewer)sender; 
    scv.ScrollToVerticalOffset(scv.VerticalOffset - e.Delta); 
    e.Handled = true; 
} 

Answer 2

ラップあなたScrollViewer

内部 ListBox

<Grid> 
    <ScrollViewer VerticalScrollBarVisibility="Auto"> 
     <ListBox ScrollViewer.HorizontalScrollBarVisibility="Disabled"> 
      <ListBoxItem> 
       <TextBlock Text="abc"/> 
      </ListBoxItem> 
      <ListBoxItem> 
       <TextBlock Text="VerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylongVerylong123" TextWrapping="Wrap"/> 
      </ListBoxItem> 
     </ListBox> 
    </ScrollViewer> 
</Grid> 

Answer 3

You c試して、

ScrollViewer.CanContentScroll="False" 

が、仮想化のコストと、 falseにCanContentScrollを設定するには、パフォーマンス上の問題を引き起こす可能性のListBoxの仮想化を無効にします。 link - アレックス