WPF Tabcontrol TabItem高CPU使用率

Question

在我的WPF应用程序中，我有一个TabControl，其中有三个TabItems。每个TabItem都有一个ItemsControl，其中ItemsSource绑定到Viewmodel中的ObservableCollection。如果我打开第一个和第二个TabItem，则CPU使用率<10％。但是，当我打开第三个Tabitem时，CPU使用率增加到> 70％，我不知道为什么。

我的第一个想法是，数据绑定会导致这种情况。所以我从这个TabItem删除了任何绑定。但即使第三个TabItem没有内容也没有调用代码，CPU使用率仍然很高。如果我切换回第一个和第二个TabItem，CPU使用率将恢复正常。

<TabControl Grid.Row="1">
        <TabItem Header="Tab1" IsSelected="True">
            <Grid>
                <Grid.Background>
                    <LinearGradientBrush EndPoint="0.504,1.5" StartPoint="0.504,0.03">
                        <GradientStop Color="#f0f0f0" Offset="0" />
                        <GradientStop Color="#DBFFDF" Offset="1" />
                    </LinearGradientBrush>
                </Grid.Background>
                <Grid.RowDefinitions>
                    <RowDefinition Height="5" />
                    <RowDefinition Height="60*" />
                    <RowDefinition Height="5" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="5" />
                    <ColumnDefinition Width="175" />
                    <ColumnDefinition Width="15" />
                    <ColumnDefinition Width="70*" />
                    <ColumnDefinition Width="5" />
                </Grid.ColumnDefinitions>
                <Border Grid.Column="1" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="#F0F0F0" BorderBrush="DarkGray" BorderThickness="3">
                    <ScrollViewer IsDeferredScrollingEnabled="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                        <view:Overview />
                    </ScrollViewer>
                </Border>
                <Border Grid.Column="3" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="#F0F0F0" BorderBrush="DarkGray" BorderThickness="3">
                    <ScrollViewer IsDeferredScrollingEnabled="True" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
                        <ItemsControl ItemsSource="{Binding OverviewElementCollection}">
                            <ItemsControl.ItemsPanel>
                                <ItemsPanelTemplate>
                                    <StackPanel Orientation="Horizontal" />
                                </ItemsPanelTemplate>
                            </ItemsControl.ItemsPanel>
                        </ItemsControl>
                    </ScrollViewer>
                </Border>
            </Grid>
        </TabItem>

        <TabItem Header="Tab2">
            <ScrollViewer IsDeferredScrollingEnabled="True" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
                <TabControl ItemsSource="{Binding TabItemCollection}" />
            </ScrollViewer>
        </TabItem>
        <TabItem Header="Tab3">
            <Grid>
                <Grid.Background>
                    <LinearGradientBrush EndPoint="0.504,1.5" StartPoint="0.504,0.03">
                        <GradientStop Color="#f0f0f0" Offset="0" />
                        <GradientStop Color="#DBFFDF" Offset="1" />
                    </LinearGradientBrush>
                </Grid.Background>
                <Grid.RowDefinitions>
                    <RowDefinition Height="5" />
                    <RowDefinition Height="60*" />
                    <RowDefinition Height="5" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="5" />
                    <ColumnDefinition Width="175" />
                    <ColumnDefinition Width="15" />
                    <ColumnDefinition Width="70*" />
                    <ColumnDefinition Width="5" />
                </Grid.ColumnDefinitions>
                <Border Grid.Column="1" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="#F0F0F0" BorderBrush="DarkGray" BorderThickness="3">
                    <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                    </ScrollViewer>
                </Border>
                <Border Grid.Column="3" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="#F0F0F0" BorderBrush="DarkGray" BorderThickness="3">
                    <ScrollViewer IsDeferredScrollingEnabled="True" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
                        <ItemsControl ItemsSource="{Binding ErrorOverviewElementCollection}">
                            <ItemsControl.ItemsPanel>
                                <ItemsPanelTemplate>
                                    <StackPanel Orientation="Horizontal" />
                                </ItemsPanelTemplate>
                            </ItemsControl.ItemsPanel>
                        </ItemsControl>
                    </ScrollViewer>
                </Border>
            </Grid>
        </TabItem>
    </TabControl>

所以我希望你能帮助我！