非虚拟化项目时与UI的交互缓慢
我们有一个相当大的Dashboard WPF应用程序，它使用ListView / Gridview解决方案来显示单元格中表示的大约400个项目。
每个单元格都有一个带有ContentTemplateSelector的ContentControl，它根据绑定数据对象上的属性更改模板。
早些时候我们使用这个正常的ListView虚拟化，但我的用户抱怨滚动体验相当差，我同意。
当我们通过启用som分组或手动停用虚拟化来停用虚拟化时，滚动变得像等效的Excel工作表一样流畅（我们正在构建要替换的应用程序）。但是我们在数据模板中的相互作用变得非常缓慢。这意味着当我们在模板中使用上下文菜单并且用户右键单击时，在上下文菜单出现之前需要2-3秒。相同单击模板中的超链接。在发生事情之前需要2-3秒。
你们有关于如何调试这个的提示吗？
附件是仪表板的图片：
单元格中项目最常用的数据窗口示例：
<Grid DataContext="{Binding DtoParent, ElementName=userControl}" d:DataContext="{Binding DtoParent,Source={StaticResource ucVm}}" >
<Grid.ContextMenu>
<ContextMenu>
<MenuItem Header="test"/>
</ContextMenu>
</Grid.ContextMenu>
<Grid DataContext="{Binding Objekt}">
<ScrollViewer ScrollChanged="dataTemplatePresentasjonKampanjeDetalj_ScrollViewer_ScrollChanged" PreviewMouseWheel="dataTemplatePresentasjonKampanjeDetalj_ScrollViewer_PreviewMouseWheel">
<Border BorderBrush="DarkGray" BorderThickness="1" Padding="2" CornerRadius="5" MouseMove="Border_MouseMove" PreviewMouseDown="Border_PreviewMouseDown" Tag="{Binding}">
<Grid>
<Grid.ContextMenu>
<ContextMenu>
<MenuItem Header="Kopier hele kampanjedetaljen" x:Name="miKampanjeDetaljCopy" Click="miKampanjeDetaljCopy_Click" Tag="{Binding}" />
<MenuItem Header="Lim inn varegruppe" x:Name="miLimInnVareGruppe" Click="miLimInnVareGruppe_Click" Tag="{Binding}">
<MenuItem.Style>
<Style TargetType="MenuItem" BasedOn="{StaticResource {x:Type MenuItem}}">
<Setter Property="IsEnabled" Value="True" />
<Style.Triggers>
<DataTrigger Binding="{Binding DtoVersjonKampanje.Låst}" Value="True">
<Setter Property="IsEnabled" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
</ContextMenu>
</Grid.ContextMenu>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.Style>
<Style TargetType="Grid">
<Style.Triggers>
<DataTrigger Binding="{Binding DtoVersjonKampanjeDetalj.ErEkaFerdig}" Value="True">
<Setter Property="Background" Value="LightGreen" />
</DataTrigger>
</Style.Triggers>
</Style>
</Grid.Style>
<StackPanel Orientation="Horizontal">
<Viewbox Width="16" Height="16" Visibility="{Binding DtoVersjonElement.KunNett, Converter={StaticResource booleanToVisibilityConverter}}" ToolTip="Gjelder kun for Nettapotek">
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</DrawingGroup.Children>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
</Rectangle.Fill>
</Rectangle>
</Viewbox>
<customControls:ccAntallProdukterVisning ToolTip="Antall produkter" />
<!--<Button Content="{Binding DtoVersjonKampanjeDetalj.Tittel}"/>-->
</StackPanel>
<ItemsControl ItemsSource="{Binding ObsCollVareTittelVisning}" VerticalAlignment="Stretch" Grid.Row="1" Grid.Column="0" VirtualizingPanel.IsVirtualizing="False"
HorizontalAlignment="Stretch" Margin="4" ItemTemplate="{StaticResource dataTemplateVareTittelVisningeHyperLink}">
</ItemsControl>
<Image Source="/WpfVFAKampanjeMaster;component/Assets/lock.png" Height="20" ToolTip="Denne kampanjen er låst for redigering"
VerticalAlignment="Top" HorizontalAlignment="Right">
<Image.Style>
<Style TargetType="Image">
<Setter Property="Visibility" Value="Collapsed" />
<Style.Triggers>
<DataTrigger Binding="{Binding DtoVersjonKampanje.Låst}" Value="True">
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</Grid>
</Border>
</ScrollViewer>
</Grid>
<DataTemplate x:Key="dataTemplateVareTittelVisningeHyperLink" DataType="presentasjon:DtoKampanjeDetaljVareTittelVisning">
<TextBlock Margin="4,0">
<TextBlock.ContextMenu>
<ContextMenu>
<MenuItem Header="Kopier varegruppe" x:Name="miKopierVareGruppe" Tag="{Binding}" Click="miKopierVareGruppe_Click" />
</ContextMenu>
</TextBlock.ContextMenu>
<Hyperlink Tag="{Binding}" x:Name="hyperLinkVareTittelVisning" Click="hyperLinkVareTittelVisning_Click">
<Hyperlink.ToolTip>
<ItemsControl ItemsSource="{Binding ObsCollTilbud}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Navn}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Hyperlink.ToolTip>
<TextBlock MaxWidth="300" TextWrapping="Wrap">
<TextBlock Text="{Binding DtoVersjonKampanjeDetaljVareTittel.Tittel}" Foreground="{Binding DtoVersjonKampanjeDetaljVareTittel.Status,Converter={StaticResource EnumVaretittelForgrunnsFargeConverter}}" />
<customControls:ccVareTittelTilbudVisning ObsCollTilbud="{Binding ObsCollTilbud}" Margin="-0,0,0,-3" />
</TextBlock>
</Hyperlink>
</TextBlock>
</DataTemplate>
1 个答案:
答案 0 :(得分：0)
好的，需要进行很多更改才能获得性能。
现在我们已接近可接受的表现。
1.使用超链接删除所有TextBlock。
2.从UserControl更改为CustomControl
3.真正有所作为的那个：
public class CustomListView : ListView
{
protected override void OnIsKeyboardFocusWithinChanged(DependencyPropertyChangedEventArgs e)
{
//huge performance hit if next line is not commented out
//base.OnIsKeyboardFocusWithinChanged(e);
}
}
我们实际上最终得到了大约45秒的初始加载时间。但由于我们有一个初始负载的进度窗口，这应该是可以接受的。
但现在该应用程序在初始负载后很快且响应迅速。
当我们使用来自WCF服务器的回调合同将所有增量数据更改推送到所有已连接的客户端时，它已成为一个非常好的仪表板应用程序。
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