The property content is set more than once

[geekchick]

Hi,

First off, the Telerik tools are really great! I'm trying to embed multiple controls inside of the expander tool. For example, I have one main expander with a tab control and tab item inside. Inside of these I want to have multiple panel controls and inside the panel controls I wish to have other controls, like a listbox, form, treeview, etc. Right now I am getting an error of The property content is set more than once when I add my ListBox control. I'm assuming I need to wrap my controls in another control like a grid or canvas? Any thoughts? Thanks in advanced.

<!-- Main Grid-->

 

 

<Grid x:Name="LayoutRoot">

 

 

 

<Grid.ColumnDefinitions>

 

 

 

<ColumnDefinition/>

 

 

 

<ColumnDefinition/>

 

 

 

<ColumnDefinition/>

 

 

 

</Grid.ColumnDefinitions>

 

 

 

<Grid.RowDefinitions>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

</Grid.RowDefinitions>

 

 

 

<!-- Main Expander containing the Tab Control-->

 

 

 

<telerik:RadExpander ExpandDirection="Down" Grid.ColumnSpan="3" Grid.RowSpan="4">

 

 

 

<!-- Tab Control-->

 

 

 

<telerikNavigation:RadTabControl>

 

 

 

<!-- Tab Items-->

 

 

 

<telerikNavigation:RadTabItem Header="Browse Results"></telerikNavigation:RadTabItem>

 

 

 

<telerikNavigation:RadTabItem Header="Analyze Clip">

 

 

 

 

<!--Panel Bar-->

 

 

 

<telerikNavigation:RadPanelBar Width="450" Height="250" Grid.Column="1" Grid.Row="0" VerticalAlignment="Top" >

 

 

 

<!--Panel Item-->

 

 

 

<telerikNavigation:RadPanelBarItem IsExpanded="True" Width="400" Height="200" Grid.Column="1" Grid.Row="0" VerticalAlignment="Top">

 

 

 

<!-- Grid for the Form Wizard-->

 

 

 

<Grid Height="200" Width="400">

 

 

 

<Grid.ColumnDefinitions>

 

 

 

<ColumnDefinition Width="0.75*"/>

 

 

 

<ColumnDefinition Width="1.5*"/>

 

 

 

<ColumnDefinition Width="0.75*"/>

 

 

 

<ColumnDefinition Width="1.5*"/>

 

 

 

</Grid.ColumnDefinitions>

 

 

 

<Grid.RowDefinitions>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

<RowDefinition/>

 

 

 

</Grid.RowDefinitions>

 

 

 

<Rectangle Grid.RowSpan="4" Grid.ColumnSpan="4" Fill="White" RadiusX="2"

 

 

RadiusY="2"></Rectangle>

 

 

 

<TextBlock HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Outlet" Grid.Column="0" Grid.Row="0"></TextBlock>

 

 

 

<TextBox Grid.Column="1" Margin="5" Height="25"></TextBox>

 

 

 

<TextBlock Grid.Column="0" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Medium"></TextBlock>

 

 

 

<telerikInput:RadComboBox Grid.Column="1" Grid.Row="1" Height="25">

 

 

 

<telerikInput:RadComboBoxItem Content="Print-Newspaper"></telerikInput:RadComboBoxItem>

 

 

 

</telerikInput:RadComboBox>

 

 

 

<TextBlock Grid.Column="0" Grid.Row="2" HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Title"></TextBlock>

 

 

 

<TextBox Grid.Row="2" Grid.Column="1" Margin="5" Height="25"></TextBox>

 

 

 

<TextBlock Grid.Column="0" Grid.Row="3" HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Byline"></TextBlock>

 

 

 

<TextBlock Grid.Row="3" Height="25" Text="John Doe" Grid.Column="1" Margin="5"></TextBlock>

 

 

 

<HyperlinkButton x:Name="StartButton" Content="Add" Grid.Column="2" Grid.Row="3" Click="StartButton_Click"></HyperlinkButton>

 

 

 

<TextBlock HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Status" Grid.Column="2" Grid.Row="0"></TextBlock>

 

 

 

<telerikInput:RadComboBox Grid.Column="3" Grid.Row="0" Height="25">

 

 

 

<telerikInput:RadComboBoxItem Content="Analyzed"></telerikInput:RadComboBoxItem>

 

 

 

</telerikInput:RadComboBox>

 

 

 

<TextBlock Grid.Row="1" Height="25" Text="Pub Date" Grid.Column="2" Margin="5"></TextBlock>

 

 

 

<telerikInput:RadMaskedTextBox Height="25" Mask="##/##/####" Grid.Column="3" Grid.Row="1"></telerikInput:RadMaskedTextBox>

 

 

 

<TextBlock HorizontalAlignment="Right" VerticalAlignment="Center"

 

 

Text="Source" Grid.Column="2" Grid.Row="2"></TextBlock>

 

 

 

</Grid>

 

 

 

<telerikInput:RadComboBox Grid.Column="3" Grid.Row="2" Height="25">

 

 

 

<telerikInput:RadComboBoxItem Content="Factavia"></telerikInput:RadComboBoxItem>

 

 

 

</telerikInput:RadComboBox>

 

 

 

</telerikNavigation:RadPanelBarItem>

 

 

 

</telerikNavigation:RadPanelBar>

 

 

 

 

<!-- List Box for Tracked Topics-->

 

 

 

<toolkit:ListBoxDragDropTarget mswindows:DragDrop.AllowDrop="True" >

 

 

 

<ListBox x:Name="listBox1" Width="250">

 

 

 

<ListBox.ItemsPanel>

 

 

 

<ItemsPanelTemplate>

 

 

 

<StackPanel/>

 

 

 

</ItemsPanelTemplate>

 

 

 

</ListBox.ItemsPanel>

 

 

 

</ListBox>

 

 

 

</toolkit:ListBoxDragDropTarget>

 

 

 

</telerikNavigation:RadTabItem>

 

 

 

</telerikNavigation:RadTabControl>

 

 

 

</telerik:RadExpander>

 

 

 

</Grid>

 

</

 

UserControl>

 

[Boyan]

Hi geekchick,

 The problem is that you need to have only one child. So when you have two controls as children of the RadTabItem which is a HeaderContentControl you get this error. So you just wrap the RadPanelbar and the Listbox with a StackPanel or a Grid and all will be fine. You will have just one child and this will be the Grid/StackPanel. Same with other ContentControls.
 If you need more help please let me know.

Kind regards,
Boyan
the Telerik team

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