Find StackPanel inside HierarchyChildTemplate

[raghul]

Hi,

How to find the stackPanel inside HierarchyChildTemplate. Please find the attached coding, when I try to find the value it returns null value, where am I going wrong??

<telerik:RadGridView.HierarchyChildTemplate>
                   <DataTemplate>
                       <StackPanel Orientation="Vertical" x:Name="lstboxStackPanel">
                           <ListBox x:Name="lstBox" Width="800" Height="150"
                            VerticalAlignment="Top" ItemsSource="{Binding ReopenNotes}">
                               <ListBox.ItemTemplate>
                                   <DataTemplate>
                                       <!--<StackPanel Orientation="Horizontal" x:Name="lstboxStackPanel">-->
                                           <Border BorderBrush="Gray" BorderThickness="0 0 0 1" Width="Auto">
                                               <telerik:RadExpander x:Name="radExpander" IsExpanded="True" VerticalContentAlignment="Top" Width="900">
                                                   <telerik:RadExpander.Header>
                                                       <StackPanel x:Name="TestRadExpanderHeader" Orientation="Horizontal">
                                                           <HyperlinkButton Name="hlkUserName" Content="{Binding Author}"></HyperlinkButton>
                                                           <TextBlock Name="txtCmtInfo" Text="{Binding Date}"></TextBlock>
                                                       </StackPanel>
                                                   </telerik:RadExpander.Header>
                                                   <telerik:RadExpander.Content>
                                               <StackPanel x:Name="SplInsideExpander" Orientation="Horizontal" Width="900">
                                                   <TextBlock Name="txtCmtDetails" Text="{Binding Note}" Width="890" TextWrapping="Wrap"></TextBlock>
                                               </StackPanel>
                                                   </telerik:RadExpander.Content>
                                               </telerik:RadExpander>
                                           </Border>
                                       <!--</StackPanel>-->
                                   </DataTemplate>
                               </ListBox.ItemTemplate>
                           </ListBox>
                           <TextBox x:Name="txtCommentsAdd" Width="800" Height="75"></TextBox>
                           <StackPanel x:Name="TestActionFooter" Orientation="Horizontal">
                               <Button x:Name="btnAdd" Content="Add" Width="Auto"></Button>
                               <Button x:Name="btnClear" Content="Clear" Width="Auto"></Button>
                           </StackPanel>
                       </StackPanel>
                   </DataTemplate>
               </telerik:RadGridView.HierarchyChildTemplate>

In the code behind I have the  coding as

StackPanel objTile1 = e.Row.Cells[0].ChildrenOfType<StackPanel>().Where(x => x.Name == "lstboxStackPanel").FirstOrDefault();

I used the above code in RowExpandedChanging event and also in RowLoaded event every where it returns null value. Please let me know how to find the stackpanel.

Regards,

Raghul

[Pavel Pavlov]

Hi Raghul,

Both events are fired too early , the child template visual tree is not yet rendered and this is why you get null .

As an alternative you may subscribe to the Loaded event of the stack panel in xaml and perform your custom logic inside the event handler.

Kind regards,
Pavel Pavlov
the Telerik team