RadExpander - HeaderTemplate Issue

[Stefan Buys]

Hi

I have a RadExpander (2011 Q2) with a custom HeaderTemplate.

See below:

<telerik:RadExpander>

    <telerik:RadExpander.HeaderTemplate>

        <DataTemplate>

            <Grid>

                <Grid.ColumnDefinitions>

                    <ColumnDefinition Width="0.5*"/>

                    <ColumnDefinition Width="0.5*" />

                </Grid.ColumnDefinitions>

                <dataInput:Label Content="{Binding Path=QueryDetails, Mode=TwoWay}" Grid.Column="0" FontWeight="Bold" Margin="0,0,10,0" Height="Auto" />

                <dataInput:Label Content="Queries" Grid.Column="1" FontWeight="Bold" HorizontalAlignment="Right"  Margin="0,0,10,0" Height="Auto" />

            </Grid>

        </DataTemplate>

    </telerik:RadExpander.HeaderTemplate>
...

</telerik:RadExpander>

I am binding the first label to a String in my ViewModel, but the UI never seems to display the value via the binding. I have tried binding the property to a label somewhere else on the page (outside the template) and it works fine.

Any advise will be welcome.

Stefan

[Tina Stancheva]

Hello Stefan,

The HeaderTemplate of the RadExpander will be only applied if the Header property is bound to a data object. Only then the control will look for a HeaderTemplate to set the visual representation of the business object bound to the header.

From the code snippet you sent I don't see if the RadExpander.Header property is databound. If it's not binding it should fix the issue. If, however, this is not the case, then please send us a sample project illustrating your scenario so that we can further investigate the issue. Thank you in advance.

Regards,
Tina Stancheva
the Telerik team