我有这个问题： 实例化此窗口后，打开右侧的所有嵌套扩展器。 （其中有7个）。最后一个包含一些元素。（TextBoxes） 尝试拖动GridSplitter。一切都很好，它工作流利。但！ 一旦我点击其中一个TextBox（无论哪一个），拖动变得疯狂缓慢（鼠标有时下降3秒后+）。 单击TextBox后，这些调试消息将显示在输出中：
'WpfApplication1.vshost.exe' (Managed): Loaded 'C:\Windows\assembly\GAC_MSIL\PresentationCore.resources\3.0.0.0_de_31bf3856ad364e35\PresentationCore.resources.dll'
'WpfApplication1.vshost.exe' (Managed): Loaded 'C:\Windows\assembly\GAC_MSIL\UIAutomationTypes\3.0.0.0__31bf3856ad364e35\UIAutomationTypes.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
此后，发生疯狂的缓慢拖拽。在调试窗口中，当暂停并进入下一步时，将显示以下消息：
'WpfApplication1.vshost.exe' (Managed): Loaded 'C:\Windows\assembly\GAC_MSIL\PresentationCore.resources\3.0.0.0_de_31bf3856ad364e35\PresentationCore.resources.dll'
'WpfApplication1.vshost.exe' (Managed): Loaded 'C:\Windows\assembly\GAC_MSIL\UIAutomationTypes\3.0.0.0__31bf3856ad364e35\UIAutomationTypes.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'MS.Internal.UIElementHelper.InvalidateAutomationAncestors'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'MS.Internal.Helper.MeasureElementWithSingleChild'
Step into: Stepping over non-user code 'System.Windows.Controls.ScrollContentPresenter.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.FrameworkElement.MeasureCore'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'System.Windows.Controls.Grid.MeasureCellsGroup'
Step into: Stepping over non-user code 'System.Windows.Controls.Grid.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.FrameworkElement.MeasureCore'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'System.Windows.Controls.ScrollViewer.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.FrameworkElement.MeasureCore'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'Microsoft.Windows.Themes.ClassicBorderDecorator.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.FrameworkElement.MeasureCore'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'System.Windows.Controls.Control.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.Controls.TextBox.MeasureOverride'
Step into: Stepping over non-user code 'System.Windows.FrameworkElement.MeasureCore'
Step into: Stepping over non-user code 'System.Windows.UIElement.Measure'
Step into: Stepping over non-user code 'System.Windows.Controls.WrapPanel.MeasureOverride'
这是代码:(不要判断质量，这只是一个测试，请）
<Window Title="Window 5" x:Class="WpfApplication1.Window5" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.Column="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Expander Grid.Row="0" Grid.Column="0" IsTabStop="False">
<Expander.Header>
<DockPanel>
<TextBlock DockPanel.Dock="Left" Text="Search:" Margin="0,0,3,0" VerticalAlignment="Center" />
<Button DockPanel.Dock="Right" Margin="3,0,0,0" IsTabStop="False">
<Button.Style>
<Style TargetType="Button">
</Style>
</Button.Style>
</Button>
<Button DockPanel.Dock="Right" Margin="3" Content="_Search..." ToolTip="Tooltip search" IsTabStop="False" />
<TextBox DockPanel.Dock="Left" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="3" MinWidth="200" TabIndex="1">
</TextBox>
</DockPanel>
</Expander.Header>
<Expander.Content>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" Text="Criteria 1:" VerticalAlignment="Center" HorizontalAlignment="Right" />
<TextBox Grid.Row="0" Grid.Column="1" />
<TextBlock Grid.Row="0" Grid.Column="2" Text="Criteria 1:" VerticalAlignment="Center" HorizontalAlignment="Right" />
<TextBox Grid.Row="0" Grid.Column="3" />
<TextBlock Grid.Row="1" Grid.Column="0" Text="Criteria 2:" VerticalAlignment="Center" HorizontalAlignment="Right" />
<TextBox Grid.Row="1" Grid.Column="1" />
<TextBlock Grid.Row="1" Grid.Column="2" Text="Criteria 2:" VerticalAlignment="Center" HorizontalAlignment="Right" />
<TextBox Grid.Row="1" Grid.Column="3" />
</Grid>
</Expander.Content>
</Expander>
</Grid>
<Border Grid.Row="1" Grid.Column="0" BorderThickness="1" CornerRadius="4">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" Text="Found Matches..." FontStyle="Italic" Panel.ZIndex="100">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Visible" />
</Style>
</TextBlock.Style>
</TextBlock>
<ListBox Grid.Row="0" Grid.Column="0" TabIndex="2">
<ListBox.Style>
<Style TargetType="ListBox">
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Margin" Value="0,7,0,7" />
</Style>
</ListBox.Style>
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="SnapsToDevicePixels" Value="true" />
<Setter Property="OverridesDefaultStyle" Value="true" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Border Margin="4,0,0,0" CornerRadius="6,0,0,6" SnapsToDevicePixels="true" Background="Transparent">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<ContentPresenter Grid.Column="0" />
<Border Padding="10,0,10,0" CornerRadius="4" Grid.Column="1">
<Path Width="13.2457" Height="12.8151" Stretch="Fill" Data="F1 M 78.1398,324.18L 52.5865,298.626C 51.6892,297.728 50.3385,297.459 49.1678,297.946C 47.9971,298.43 47.2305,299.574 47.2305,300.843L 60.6385,326.398L 47.2305,351.952C 47.2305,353.223 47.9971,354.364 49.1678,354.848C 49.5558,355.011 49.9638,355.09 50.3678,355.09C 51.1838,355.09 51.9852,354.77 52.5865,354.171L 78.1398,328.616C 78.7238,328.032 79.0598,327.224 79.0598,326.398C 79.0598,325.572 78.7238,324.764 78.1398,324.18 Z ">
<Path.Style>
<Style TargetType="Path">
<Setter Property="Fill" Value="#FF000000" />
</Style>
</Path.Style>
</Path>
<Border.Style>
<Style TargetType="Border">
<Setter Property="Visibility" Value="Visible" />
<Setter Property="Background" Value="Transparent" />
</Style>
</Border.Style>
</Border>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
<GridSplitter Grid.Row="0" Grid.Column="1" Focusable="False" HorizontalAlignment="Right" ResizeDirection="Columns" ResizeBehavior="PreviousAndNext" VerticalAlignment="Stretch">
<GridSplitter.Style>
<Style TargetType="GridSplitter">
<Setter Property="IsEnabled" Value="True" />
<Setter Property="Width" Value="10" />
</Style>
</GridSplitter.Style>
</GridSplitter>
<Border Grid.Row="0" Grid.Column="2" BorderThickness="0,2,2,2" CornerRadius="0,4,4,0">
<ScrollViewer>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Button Grid.Row="0" Grid.Column="0" Content="Edit" HorizontalAlignment="Right" Margin="0,5,5,0" TabIndex="3">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Focusable" Value="True" />
</Style>
</Button.Style>
</Button>
<Expander Grid.Row="1" Grid.Column="0">
<Expander>
<Expander>
<Expander>
<Expander>
<Expander>
<Expander>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.Column="0" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Path Grid.Row="0" Grid.Column="0" Margin="5" />
<TextBlock Grid.Row="0" Grid.Column="1" FontWeight="Bold" VerticalAlignment="Center" HorizontalAlignment="Left" TextAlignment="Left" />
</Grid>
<WrapPanel Grid.Row="2" Grid.Column="0" Orientation="Horizontal">
<Grid Margin="5">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
<Grid Margin="5">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
</Grid>
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
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<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBox />
<TextBlock Grid.Row="5" Grid.Column="0" Grid.ColumnSpan="4" Text="Mega Text String Lorem ipsum et asdf asdf adsf asdf asdString Lorem ipsum et asdf asdf adsf asdf asdString Lorem ipsum et asdf asdf adsf asdf asd " FontSize="28" VerticalAlignment="Center" TextWrapping="Wrap" />
</WrapPanel>
</Grid>
</Expander>
</Expander>
</Expander>
</Expander>
</Expander>
</Expander>
</Expander>
</Grid>
</ScrollViewer>
</Border>
</Grid>
</Border>
</Grid>
</Window>
答案 0 :(得分：1)
我复制了你的代码......应用程序运行得很快，我可以流畅地GridSplitter滑动TextBox，同时聚焦其中一个{{1}} - 元素。
也许，你应该在非调试模式下运行应用程序。