We have 2 Radlistboxes within a usercontrol.  We can drag and drop items between both with no issues and can reorder within each listbox with no issues either. Each radlistbox is highly stylized with grid's within each to create the look we need and to position data when drag and drop occurs.

What we would like to do is allow items from radlistbox1 to be dragged into radlistbox2.  However, we do not want the item from radlistbox1 to be removed.  Is there a built in function that would allow us to do this relatively simply? 

All examples (in documentation) and demo wpf drag and drop but remove items.  Let's see an example that matches what we need.  Documentation and forums have not given us an ideas on how to implement this functionality.

Any code examples would be helpful also.

Thanks

 See partial Code below for the user control

<UserControl.Resources>
        <Style x:Key="DraggableListBoxItem" TargetType="telerik:RadListBoxItem">
            <Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="True" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding ExhibitType}" Value="CE">
                    <Setter Property="BorderBrush" Value="#DAF2CB"></Setter>
                    <Setter Property="Background" Value="#F2F7EF"></Setter>
                    <Setter Property="Margin" Value="0,2,0,2"></Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>

    </UserControl.Resources>

<telerik:RadListBox x:Name="RadListBox1" TabIndex="1" Grid.Row="0" Margin="0,5,0,0" FontSize="11" 
                                            SelectionMode="Multiple"  
                                            ItemContainerStyle="{StaticResource DraggableListBoxItem}">
                            <telerik:RadListBox.ItemTemplate>
                                <DataTemplate>
                                    <Grid telerik:DragDropManager.AllowDrag="True" >
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="Auto" />
                                            <ColumnDefinition Width="Auto" />
                                        </Grid.ColumnDefinitions>
                                        <Button x:Name="btnPreviewReportLayoutImage" Click="btnPreviewReportLayoutImage_Click" 
                                                Height="16" Width="16" Margin="3 0 3 0" Grid.Column="0" 
                                                ToolTip="Click On Image To View Report Layout" HorizontalAlignment="Left">
                                            <Button.Template>
                                                <ControlTemplate>
                                                    <Image Source="../Images/ReportImage2.png"  />
                                                </ControlTemplate>
                                            </Button.Template>
                                        </Button>
                                        <TextBlock Text="{Binding Name}" TextWrapping="Wrap" Grid.Column="1"></TextBlock>
                                    </Grid>
                                </DataTemplate>
                            </telerik:RadListBox.ItemTemplate>
                            <telerik:RadListBox.DragVisualProvider>
                                <telerik:ScreenshotDragVisualProvider />
                            </telerik:RadListBox.DragVisualProvider>
                            <telerik:RadListBox.DragDropBehavior>
                                <telerik:ListBoxDragDropBehavior />
                            </telerik:RadListBox.DragDropBehavior>
                        </telerik:RadListBox>

<telerik:RadListBox x:Name="RadListBox2" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="5" Margin="2,5,2,2" FontSize="11"
                                        AllowDrop="True" SelectionMode="Multiple" 
                                        ItemContainerStyle="{StaticResource DraggableListBoxItem}"
                                        ScrollViewer.CanContentScroll="True">
                        <telerik:RadListBox.ItemTemplate>
                            <DataTemplate>
                                <Grid telerik:DragDropManager.AllowDrag="True" >
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="400" />
                                        <ColumnDefinition Width="80" />
                                        <ColumnDefinition Width="80" />
                                        <ColumnDefinition Width="140" />
                                        <ColumnDefinition Width="2*" />
                                    </Grid.ColumnDefinitions>
                                    <TextBlock Text="{Binding Name}" TextWrapping="Wrap"></TextBlock>
                                    <ComboBox x:Name="cbGroupLevel" Grid.Column="1" SelectedValuePath="Content" SelectedValue="{Binding Grouping}" Margin="0 0 15 0" >
                                        <ComboBoxItem>E</ComboBoxItem>
                                        <ComboBoxItem>P</ComboBoxItem>
                                        <ComboBoxItem>-</ComboBoxItem>
                                    </ComboBox>
                                    <ComboBox x:Name="cbTOCLevel" Grid.Column="2" SelectedValuePath="Content" SelectedValue="{Binding TOCLevel}" Margin="0 0 15 0">
                                        <ComboBoxItem>0</ComboBoxItem>
                                        <ComboBoxItem>1</ComboBoxItem>
                                        <ComboBoxItem>2</ComboBoxItem>
                                        <ComboBoxItem>3</ComboBoxItem>
                                        <ComboBoxItem>4</ComboBoxItem>
                                    </ComboBox>
                                    <ComboBox x:Name="cbPortfolios" Grid.Column="3" SelectedValuePath="Content" 
                                              SelectedValue="{Binding Portfolios}" Margin="0 0 15 0">
                                        <ComboBox.ItemTemplate>
                                            <DataTemplate>
                                                <StackPanel Orientation="Horizontal">
                                                    <CheckBox IsChecked="{Binding IsSelected}" Width="20" VerticalAlignment="Center" />
                                                </StackPanel>
                                            </DataTemplate>
                                        </ComboBox.ItemTemplate>
                                        <ComboBoxItem IsSelected="True">All</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                        <ComboBoxItem>Placeholder with a very long name.......................</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                        <ComboBoxItem>Placeholder</ComboBoxItem>
                                    </ComboBox>
                                    <TextBlock Grid.Column="4" Text="{Binding TOCTitle}"></TextBlock>
                                </Grid>
                            </DataTemplate>
                       </telerik:RadListBox.ItemTemplate>
                        <telerik:RadListBox.DragVisualProvider>
                            <telerik:ScreenshotDragVisualProvider />
                        </telerik:RadListBox.DragVisualProvider>
                        <telerik:RadListBox.DragDropBehavior>
                            <telerik:ListBoxDragDropBehavior AllowReorder="True"/>
                        </telerik:RadListBox.DragDropBehavior>

                    </telerik:RadListBox>

I have a custom usercontrol that is replacing the ContentTemplate for a RadDiagramShape. This usercontrol has a listbox containing other usercontrols.

I'm wondering how I can have the RadDiagram drag and selection events captured for the parent shape when clicking on items in the inner listbox?

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I am using an HtmlFormatProvider to export HTML from a RichTextBox to a database field that eventually gets used in a report for SSRS. Thanks to the many settings available in HtmlExportSettings, I've been able to get very close to a format that works with SSRS. The biggest problem I have remaining is that the SSRS docs specifically state that font-size specified in 'px' units are not supported. Yet those are the only units I've been able to get the HtmlFormatProvider to export the font-size.

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