System.NullReferenceException in RadDocking

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Docking
Leonid
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Leonid asked on 08 Jul 2021, 10:26 PM

Hello! I am learning an RadDocking example from Telerik Wpf Demo. When I try to unpin (hide) a RadPane I see an System.NullReferenceException. What's the problem?

Here's the code.

 <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <telerik:RadDocking x:Name="radDocking1"
                            RetainPaneSizeMode="DockingAndFloating"
                            CanAutoHideAreaExceedScreen="True"
                            Grid.Row="0" Margin="0 0 0 10"
                            BorderThickness="0"
                            Padding="0">

            <telerik:RadDocking.DocumentHost>
                <telerik:RadSplitContainer>
                    <telerik:RadPaneGroup>
                        <telerik:RadDocumentPane Title="Description">
                        </telerik:RadDocumentPane>
                        <telerik:RadPane Header="NotDragable" CanFloat="False">
                            <telerik:RadPane.Content>
                                <TextBlock TextWrapping="Wrap" Text="This pane cannot be dragged, because it has its property CanFloat set 'False'." />
                            </telerik:RadPane.Content>
                        </telerik:RadPane>
                    </telerik:RadPaneGroup>
                </telerik:RadSplitContainer>
            </telerik:RadDocking.DocumentHost>

            <telerik:RadSplitContainer  MaxWidth="600" telerik:DockingPanel.InitialSize="210,150"
                    Name="LeftContainer" InitialPosition="DockedLeft">
                <telerik:RadPaneGroup x:Name="Group1">

                    <telerik:RadPane x:Name="Pane1" Header="Server Explorer">
                    </telerik:RadPane>

                    <telerik:RadPane x:Name="Pane2" Header="Toolbox">
                    </telerik:RadPane>
                </telerik:RadPaneGroup>
            </telerik:RadSplitContainer>

            <telerik:RadSplitContainer MaxWidth="679" telerik:DockingPanel.InitialSize="210,150"
                                       x:Name="RightContainer" InitialPosition="DockedRight">
                <telerik:RadPaneGroup x:Name="Group2">

                    <telerik:RadPane x:Name="Pane3" Header="Solution Explorer">
                    </telerik:RadPane>

                    <telerik:RadPane x:Name="Pane4" Header="Properties">
                    </telerik:RadPane>

                </telerik:RadPaneGroup>
            </telerik:RadSplitContainer>

            <telerik:RadSplitContainer InitialPosition="FloatingDockable"
                    telerik:RadDocking.FloatingLocation="450, 250"
                    telerik:RadDocking.FloatingSize="300, 220">
                <telerik:RadPaneGroup>
                    <telerik:RadPane Header="Not Document Pane" CanDockInDocumentHost="False">

                    </telerik:RadPane>
                </telerik:RadPaneGroup>
            </telerik:RadSplitContainer>

            <telerik:RadSplitContainer telerik:DockingPanel.InitialSize="200,180"
                    x:Name="BottomContainer" InitialPosition="DockedBottom">
                <telerik:RadPaneGroup x:Name="Group3">

                    <telerik:RadPane x:Name="Pane5" Header="Output">
                    </telerik:RadPane>

                    <telerik:RadPane x:Name="Pane6" Header="Error List">
                    </telerik:RadPane>

                </telerik:RadPaneGroup>
            </telerik:RadSplitContainer>
        </telerik:RadDocking>
    </Grid>

Stenly
Telerik team
commented on 12 Jul 2021, 02:11 PM

I have tested your code, but I have not found the specified problem. I have attached a sample project. Could you look at it and tell me if I am missing anything?

Could you also specify what version of the Telerik UI for WPF you are using?

 

 

No answers yet. Maybe you can help?

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Docking
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Leonid
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