So I have a TabControl that normally resides inside a TabItem. I would like to put that tab control inside a StackPanel so I can add some content above the TabControl. However, as soon as I put the TabControl inside a StackPanel the application stops working -- there is a memory leak somewhere and if I look at my process in Windows Task Manager it just keeps using more and more memory until it needs shut down. My .xaml file is pretty straightforward:
<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>
And my tab control style:
<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>
Now the problem is if I throw a StackPanel around my inner tab control things go south fast
<TabItem Header="Something" Name="something">
<StackPanel>
<TabControl Name="tabControlInner" Style="{StaticResource TabControlStyle1}"/>
<StackPanel>
</TabItem>
I`m adding tab items to my tab control programatically as such below:
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
}
Can someone see what is going on?? There are no exceptions being thrown anywhere.
FindControl()method vs.FindName– MethodMan