在我的win phone 7应用程序中,我想禁用列表框中的垂直滚动。但是当我用如何在禁用滚动时保留滚动位置
listbox.SetValue(ScrollViewer.VerticalScrollBarVisibilityProperty, ScrollBarVisibility.Disabled);
列表框滚动到顶部。如何禁用滚动时保留滚动位置?
编辑:我想通过吞噬事件在列表框处理它们之前禁用滚动。但是当我尝试处理ManipulationStarted和ManipulationCompleted时,我有例外。我应该处理哪些事件以使列表框不能滚动? 当我将在ManipulationStarted,在ManipulationDelta并在ManipulationCompleted在我的代码来处理,我有这个堆栈跟踪空例外:
at Microsoft.Phone.Gestures.GestureHelper.ReleaseMouseCaptureAtGestureOrigin()
at Microsoft.Phone.Gestures.GestureHelper.NotifyMove(InputDeltaArgs args)
at Microsoft.Phone.Gestures.ManipulationGestureHelper.Target_ManipulationDelta(Object sender, ManipulationDeltaEventArgs e)
at System.Windows.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)
at Microsoft.Xna.Framework.Input.UnsafeNativeMethods.CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
at Microsoft.Xna.Framework.Input.SafeNativeMethods.CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
at Microsoft.Xna.Framework.Input.WindowMessageHooker.Hook.WndProc(IntPtr msgWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
编辑:我发现默认列表框的作品,因为我想,当禁用滚动。但是我的列表框有一个带有ItemPresenter的堆栈的自定义模板来禁用UI虚拟化。在这种情况下,禁用滚动时,列表框自动滚动到顶部。
编辑:这里是ListBox的模板:
<phone:PhoneApplicationPage.Resources>
<Style x:Key="ListBoxStyle1" TargetType="ListBox">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Foreground" Value="{StaticResource PhoneForegroundBrush}"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBox">
<ScrollViewer x:Name="ScrollViewer" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" Padding="{TemplateBinding Padding}">
<StackPanel Orientation="Vertical" Width="468">
<ItemsPresenter d:LayoutOverrides="Width"/>
</StackPanel>
</ScrollViewer>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</phone:PhoneApplicationPage.Resources>
和XAML:
<ListBox x:Name="MainListBox" Margin="0,0,-12,0" ItemsSource="{Binding Items}" SelectionChanged="MainListBox_SelectionChanged" Style="{StaticResource ListBoxStyle1}" GotFocus="gotfocus" LostFocus="lostfocus">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432">
<TextBlock Text="{Binding LineOne}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="{Binding LineTwo}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
在的GotFocus和LostFocus功能,我禁用和启用滚动分别。该列表框来自默认的数据绑定应用程序。当我向下滚动并单击一个项目时,列表框滚动到顶部。当我不使用堆栈来保存ItemPresenter时,它不会发生。
你可以显示列表框的XAML? – keyboardP
是的,我已经更新了这个问题=) –