我创建了一个propertyGrid之类的。 我使用了一个使用viewmodel对象的Item控件。 VM对象具有要显示的属性及其相关的DataTemplates。 一切都很好。我的属性网格实际上就像VS属性网格
我的问题是,每次使用更改所选对象(导致属性网格中的更改)时,都需要花费很多时间(取决于所选对象属性的数量)。我发现性能不佳的原因是模板加载和渲染。 所以我认为我可以通过为每个对象创建真正的控件来解决这个问题,而不仅仅是使用模板。 (为每个属性创建按钮和文本框)这将解决加载时间,我希望..
1-有没有办法使用数据模板创建真正的控件(在代码中)? 2-有没有其他方法可以改善我的Property网格的性能?
propGrid的主要代码附于此帖子
谢谢,Leon
CODE:
<DataTemplate x:Key="gridItemsControl" >
<Grid Visibility="{Binding Visibility}">
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="60" MaxWidth="350" Width="{Binding Source={StaticResource firstCulWidth},Path=Width,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,Converter={StaticResource widthToGridLenConverter}}"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" BorderBrush="#ff333333" BorderThickness="0.5" Grid.ColumnSpan="2"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter},ConverterParameter=Category}">
<StackPanel Orientation="Horizontal" Background="#FFA9BFD4" Height="25">
<Expander Template="{StaticResource SimpleExpanderTemp}" ExpandDirection="Left" IsExpanded="{Binding IsExpanded, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Margin="3,0,5,0"/>
<Label Content="{Binding Path=CategoryName,Converter={StaticResource propertyNameToDiplayNameConverter}}" FontSize="12" Foreground="White" VerticalAlignment="Top" />
</StackPanel>
</Border>
<Border Grid.Column="0" BorderBrush="#ff333333" BorderThickness="0.5"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}">
<Label Margin="5,0,0,0" Content="{Binding Path=DisplayName,Converter={StaticResource propertyNameToDiplayNameConverter}}"/>
</Border>
<GridSplitter Grid.Row="0" Grid.Column="0" Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}" HorizontalAlignment="Right" Width="4" Background="Transparent"/>
<Border Grid.Column="1" BorderBrush="#ff333333" BorderThickness="0.5"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}">
<ContentPresenter Grid.Column="1" Margin="10,1,10,1" HorizontalAlignment="Left"
ContentTemplate="{Binding Path=InlineTemplate}" />
</Border>
</Grid>
</DataTemplate>
更新:这是容器
<ItemsControl Name="propsDataGrid" ItemsSource="{Binding Properties}" ItemTemplate ="{StaticResource gridItemsControl}">
<ItemsControl.ContextMenu>
<ContextMenu>
<MenuItem Header="Close all expanders" Click="MenuItem_Click" Visibility="{Binding IsAlphaBeticSort,Converter={StaticResource boolToVisConverter},ConverterParameter=VisForFalse}"></MenuItem>
<MenuItem Header="Expand all" Name="mnExpandeAll" Click="mnExpandeAll_Click" Visibility="{Binding IsAlphaBeticSort,Converter={StaticResource boolToVisConverter},ConverterParameter=VisForFalse}"></MenuItem>
</ContextMenu>
</ItemsControl.ContextMenu>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<!--<ItemsControl.ItemTemplate>
<DataTemplate >
<Grid Visibility="{Binding Visibility}">
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="60" MaxWidth="350" Width="{Binding Source={StaticResource firstCulWidth},Path=Width,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,Converter={StaticResource widthToGridLenConverter}}"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" BorderBrush="#ff333333" BorderThickness="0.5" Grid.ColumnSpan="2"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter},ConverterParameter=Category}">
<StackPanel Orientation="Horizontal" Background="#FFA9BFD4" Height="25">
<Expander Template="{StaticResource SimpleExpanderTemp}" ExpandDirection="Left" IsExpanded="{Binding IsExpanded, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Margin="3,0,5,0"/>
<Label Content="{Binding Path=CategoryName,Converter={StaticResource propertyNameToDiplayNameConverter}}" FontSize="12" Foreground="White" VerticalAlignment="Top" />
</StackPanel>
</Border>
<Border Grid.Column="0" BorderBrush="#ff333333" BorderThickness="0.5"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}">
<Label Margin="5,0,0,0" Content="{Binding Path=DisplayName,Converter={StaticResource propertyNameToDiplayNameConverter}}"/>
</Border>
<GridSplitter Grid.Row="0" Grid.Column="0" Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}" HorizontalAlignment="Right" Width="4" Background="Transparent"/>
<Border Grid.Column="1" BorderBrush="#ff333333" BorderThickness="0.5"
Visibility ="{Binding IsCategoryItem,Converter={StaticResource isCategoryItemToVisibilityConverter}}">
<ContentPresenter Grid.Column="1" Margin="10,1,10,1" HorizontalAlignment="Left"
ContentTemplate="{Binding Path=InlineTemplate}" />
</Border>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>-->
</ItemsControl>
答案 0 :(得分:0)
DataTemplates
创建“真正的控件”手动执行任务都没有任何好处,这是使用模板自动完成的,您唯一需要担心的是虚拟化(以便控制不会创建不在视图中的属性)以及模板的连接方式,以便不会不必要地触发它们的创建。
(顺便说一句,你创建网格的方式,设置它的宽度,看起来可能是多余的,你可能只需要share the size。)
要使ItemsControl
虚拟化您需要的项目:
ItemsPanel
设置为VirtualizingStackPanel
ScrollViewer
所在的ItemsPresenter
周围包含VirtualizingStackPanel
。ScrollViewer.CanContentScroll
设置为true
以启用允许虚拟化的项目滚动。e.g。
<ItemsControl ItemsSource="{Binding Items}"
ScrollViewer.CanContentScroll="True">
<ItemsControl.Template>
<ControlTemplate>
<Border Name="Bd" Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="true"
Padding="1">
<ScrollViewer Padding="{TemplateBinding Padding}" Focusable="false">
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ScrollViewer>
</Border>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<!-- ... -->
</ItemsControl>
如果这仍然太慢,您可以制作模板的整个ItemsControl
部分,该模板应用每种类型,因为此网格的内容可能取决于项目的类型,因此,只有在项目类型发生变化时才能创建不同的网格,同时您也可以缓存生成的模板(我从未尝试过这样做)。