Hi,

We are using dockmanager and Group Pane inside that we have set of content panes. When we close the content pane it is not releasing memory. This issue i already raised in support request but the solution is not perfect it is leaking memory.

Please revert back, It is urgent

I'm unable to upload the file since forum site is having issues in file uploading

 Code:

<igRibbon:XamRibbonWindow x:Class="XamTabControlTest.Window2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                          xmlns:igDock="http://infragistics.com/DockManager"
    xmlns:igRibbon="http://infragistics.com/Ribbon"
    Title="Window2" Height="300" Width="300">
    <igRibbon:XamRibbonWindow.Resources>
         <DataTemplate x:Key="tabItemHeaderWithClose">
                <DockPanel x:Name="pnl">
                    <Button x:Name="closeBtn" DockPanel.Dock="Right"
                            Visibility="Collapsed"
                            Margin="3,3,0,3" VerticalAlignment="Center"
                            Command="{x:Static igDock:ContentPaneCommands.Close}"
                            CommandTarget="{Binding Path=Pane,RelativeSource={RelativeSource AncestorType={x:Type igDock:PaneTabItem}}}"
                            Style="{DynamicResource {x:Static igDock:TabGroupPane.DocumentCloseButtonStyleKey}}"
                          />
                    <TextBlock Text="{Binding}" />
                </DockPanel>
                <DataTemplate.Triggers>
                    <Trigger Property="igDock:XamDockManager.PaneLocation" Value="Document">
                        <Setter TargetName="closeBtn" Property="Visibility" Value="Visible" />
                    </Trigger>
                <DataTrigger Binding="{Binding Path=Role, RelativeSource={RelativeSource AncestorType={x:Type MenuItem}}}"
                 Value="SubmenuItem">
                    <Setter TargetName="closeBtn" Property="Visibility" Value="Collapsed" />
                </DataTrigger>
            </DataTemplate.Triggers>         
        </DataTemplate>
    </igRibbon:XamRibbonWindow.Resources>
    <igRibbon:RibbonWindowContentHost >
     
    <Grid>
           
                <DockPanel LastChildFill="True" HorizontalAlignment="Stretch"   >
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch" DockPanel.Dock="Top" >
                    <Menu Width="1024">
                        <MenuItem Name="mnuCheck" Header="Tab Menu"  >
                            <MenuItem Header="Add New Tab" Click="MenuItem_Click"/>
                            <MenuItem Header="Remove Last" Click="MenuItem_Click_1"/>
                            <MenuItem Header="GC" Click="MenuItem_Click_2"/>
                        </MenuItem>
                    </Menu>
                </StackPanel>
                <igDock:XamDockManager DockPanel.Dock="Bottom" xmlns:igDock="http://infragistics.com/DockManager" Background="Transparent" Margin="2,2,2,2">
                    <igDock:DocumentContentHost>
                        <igDock:SplitPane>
                            <igDock:TabGroupPane  Name="cgGroupPane" Background="Transparent">
                            </igDock:TabGroupPane>
                        </igDock:SplitPane>
                    </igDock:DocumentContentHost>
                </igDock:XamDockManager>
            </DockPanel>
        </Grid>
    </igRibbon:RibbonWindowContentHost>
</igRibbon:XamRibbonWindow>

Code Behind:

public void AddContentPane(ContentPane objContentPane, string strContentHeader)
        {
            try {

                objContentPane.Header = strContentHeader;
                objContentPane.AllowDocking = false;
                objContentPane.AllowDockingFloating = false;
                objContentPane.AllowDockingInTabGroup = false;
                objContentPane.AllowDockingInTabGroup = false;
                objContentPane.AllowDockingLeft = false;
                objContentPane.AllowDockingRight = false;
                objContentPane.AllowDockingTop = false;
                objContentPane.AllowPinning = false;
                objContentPane.AllowDockingBottom = false;
                objContentPane.IsPinned = false;
                objContentPane.AllowDrop = false;
                objContentPane.AllowFloatingOnly = false;
                objContentPane.AllowInDocumentHost = false;
                objContentPane.TabHeaderTemplate = (System.Windows.DataTemplate)this.FindResource("tabItemHeaderWithClose");
                objContentPane.Closed +=new EventHandler<Infragistics.Windows.DockManager.Events.PaneClosedEventArgs>(objContentPane_Closed);
                cgGroupPane.Items.Add(objContentPane);
                objContentPane.Activate();                
               
            }
            catch (Exception ex) {
                MessageBox.Show(ex.Message);
            }
        }  
        int count = 0;
        Contents ct;
        private void MenuItem_Click(object sender, RoutedEventArgs e)
        {
            ct = new Contents();
            count = count + 1;           
            AddContentPane((ContentPane)ct, "New");
        }
        private void objContentPane_Closed(object sender,Infragistics.Windows.DockManager.Events.PaneClosedEventArgs e)
        {
            ((ContentPane)sender).Closed -= new EventHandler<Infragistics.Windows.DockManager.Events.PaneClosedEventArgs>(objContentPane_Closed);
            cgGroupPane.Items.RemoveAt(count - 1);
            ct = null;
            count = count - 1;
            System.GC.Collect(0,GCCollectionMode.Forced);
            System.GC.Collect(1, GCCollectionMode.Forced);
            System.GC.Collect(System.GC.MaxGeneration, GCCollectionMode.Forced);
        }

        private void showMessage()
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf = new BinaryFormatter();
            bf.Serialize(ms, bf);
            MessageBox.Show(ms.Length.ToString());
            ms.Close();
        }

        private void MenuItem_Click_1(object sender, RoutedEventArgs e)
        {
            try
            {
               //showMessage();
                cgGroupPane.Items.RemoveAt(count - 1);
                ct = null;
                count = count - 1;
                //showMessage();
            }
            catch (Exception ex)
            {
              
            }
            finally
            {
                //MessageBox.Show(GC.GetTotalMemory(false).ToString());
                System.GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
                //MessageBox.Show(GC.GetTotalMemory(false).ToString());
            }
          
        }

        private void MenuItem_Click_2(object sender, RoutedEventArgs e)
        {
//            System.Threading.Thread.Sleep(2000);
            System.GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);                 
        }