RadBook PageFilpEventArgs.Page.FindName

[John Thompson]

I have the follow XAML in a RadBook control and I am attempting to find a control in the Grid.

            <telerikNavigation:RadBook.LeftPageTemplate>
                <DataTemplate>
                    <Border BorderBrush="Silver" BorderThickness="2">
                        <Grid x:Name="PageRoot" Background="GhostWhite">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>

                            <Border Background="LightGray" Opacity="0.5" BorderThickness="0 0 0 1" BorderBrush="Gray">
                                <TextBlock Text="{Binding FullName}" HorizontalAlignment="Center" FontSize="14" FontWeight="Bold" TextWrapping="Wrap" />
                            </Border>

                            <Image Source="{Binding Photograph, Converter={StaticResource convertImage}}" HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="1" Stretch="None" Opacity="1" />

                            <TextBlock x:Name="EmpNo" Text="{Binding EmployeeNumber}" HorizontalAlignment="Center" Grid.Row="2" VerticalAlignment="Center" FontSize="12" FontWeight="Bold" TextWrapping="Wrap" Tag="{Binding EEID}" />
                        </Grid>
                    </Border>
                </DataTemplate>
            </telerikNavigation:RadBook.LeftPageTemplate>

TextBlock empNo = e.Page.FindName("PageRoot") as TextBlock;

The empNo instance is always null and of course EmpNo is not defined because it is inside a DataTemplate control.  Is there anyway to access the TextBlock either in code or declaratively.  Thank you in advance!

[Helen]

This thread may help: http://forums.silverlight.net/forums/p/155468/348033.aspx

cheers

Helen

[Kiril Stanoev]

Hi John,

WPF's DataTemplate has a nice method called FindName, which unfortunately is missing in Silverlight. Therefore, for this scenario you will have to use the VisualTreeHelper class:

private void Book_PageFlipStarted(object sender, PageFlipEventArgs e)
{
    Grid bookItemLayoutRoot = VisualTreeHelper.GetChild(e.Page, 0) as Grid;
    ContentPresenter contentPresenter = (bookItemLayoutRoot as Grid).Children[0] as ContentPresenter;
    Border pageRoot = VisualTreeHelper.GetChild(contentPresenter, 0) as Border;
    TextBlock empNo = pageRoot.FindName("EmpNo") as TextBlock;
}

Give it a try and let me know if it helps.

Greetings,
Kiril Stanoev
the Telerik team

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