Question

所以我有一个TabControl，它通常位于TabItem中。我想将该选项卡控件放在StackPanel中，这样我就可以在TabControl上面添加一些内容。但是，只要我将TabControl放在StackPanel中，应用程序就会停止工作 - 某处存在内存泄漏，如果我在Windows任务管理器中查看我的进程，它会继续使用越来越多的内存，直到需要关闭为止。我的.xaml文件非常简单：

<TabControl Name="tabControlOuter" Margin="0,20,0,0" Background="#222222" >
<TabItem>...</TabItem> 
<TabItem>...</TabItem> 
<TabItem Header="Something" Name="something">
    <TabControl Name="tabControlInner" Style="{StaticResource TabControlStyle1}"/>
</TabItem>

我的标签控件样式：

<Style x:Key="TabControlStyle1" TargetType="{x:Type TabControl}">
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
        <Setter Property="Padding" Value="4,4,4,4"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="BorderBrush" Value="Black"/>
        <Setter Property="Background" Value="#222222"/>
        <Setter Property="HorizontalContentAlignment" Value="Center"/>
        <Setter Property="VerticalContentAlignment" Value="Center"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TabControl}">
                    <Grid x:Name="ctlgrid" ClipToBounds="true" SnapsToDevicePixels="true" KeyboardNavigation.TabNavigation="Local">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition x:Name="ColumnDefinition0"/>
                            <ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition x:Name="RowDefinition0" Height="Auto"/>
                            <RowDefinition x:Name="RowDefinition1" Height="*"/>
                        </Grid.RowDefinitions>
                        <Grid Panel.ZIndex="1">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <WrapPanel x:Name="HeaderPanel" Grid.Column="0" IsItemsHost="true" Background="#666666" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>
                            <DockPanel Width="300" x:Name="SearchDock" Background="#666666" Grid.Column="1" Height="65">
                                <Border BorderBrush="White" BorderThickness="1,0,1,0" HorizontalAlignment="Right" Margin="0,0,10,0"></Border>

                                <Label x:Name="searchStat" Height="30" DockPanel.Dock="Bottom" Foreground="White"></Label>
                                <TextBox x:Name="Search" Margin="0,0,10,0" Width="150" Height="30" DockPanel.Dock="Left" />

                                <Button ToolTip="Search" Width="35" Height="30" Padding="5,5,5,2" Margin="10,0,-30,0" Click="search_logs" DockPanel.Dock="Left" >
                                    <Image Source="/Images/mglass.png" />
                                </Button>
                                <Button ToolTip="Next Search Result" Margin="0,0,20,0" Width="30" Height="30" Content="Next" Click="next_result" DockPanel.Dock="Right">
                                </Button>
                                <Button ToolTip="Previous Search Result" Margin="30,0,0,0" Width="30" Height="30" Content="Prev" Click="prev_result" DockPanel.Dock="Right">
                                </Button>


                            </DockPanel>

                        </Grid>

                        <Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
                            <ContentPresenter x:Name="PART_SelectedContentHost" ContentSource="SelectedContent" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </Border>



                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="TabStripPlacement" Value="Left">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
                            <Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>
                            <Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>
                            <Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>
                            <Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
                            <Setter Property="Height" TargetName="RowDefinition1" Value="0"/>                               
                        </Trigger>

                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

现在的问题是，如果我在我的内部选项卡周围抛出一个StackPanel，控制事情会快速向南移动

<TabItem Header="Something" Name="something">
<StackPanel>
    <TabControl Name="tabControlInner" Style="{StaticResource TabControlStyle1}"/>
<StackPanel>
</TabItem>

我正在以编程方式将标签项添加到我的标签控件中，如下所示：

TabControl itemsTab = (TabControl)this.FindName("tabControlInner");
            itemsTab.Items.Clear();
            TabItem setThistab = (TabItem)this.FindName("something");
            setThistab.IsSelected = true;
            foreach (CustomItem ale in my_collection)
            {
                TabItem newTab = new TabItem();
                FrameDisplayTab ftab1 = new FrameDisplayTab();
                ftab1.MyDatagrid.ItemsSource = ale.logentries;
                newTab.Content = ftab1;
                newTab.Header = ale.name;
                itemsTab.Items.Add(newTab); <-- this is where I get into trouble from the stack pane. Everything works fine if my inner tab control is not in a stack panel or if I omit this line

            }

有人能看到发生了什么吗？在任何地方都没有例外。

Answer 1

对于遇到此问题的任何人来说，看起来StackPanel就是问题所在。似乎除非你在StackPanel上指定宽度和高度，否则它和它的子节点的高度和宽度都会导致问题。因为我希望高度和宽度是'拉伸'，所以我不能使用StackPanel。

为了解决这个问题，我从StackPanel更改为DockPanel。问题解决了

TabControl无法在stackpanel内部工作

1 个答案: