Changing Expander Style

[Varun Mangla]

Hello,

I am working on Grid View and making use of HierarchyChildTemplate in GridViewDataControl. I want to make changes to the default expander that comes while using HierarchyChildTemplate. How can I do it?

Thanks,

Varun

[Kalin Milanov]

Hi Varun Mangla,

The best way to do this is to use the GridViewExpandableRowStyle property of the grid and edit the style and the template of expander.

Best wishes,
Kalin Milanov
the Telerik team

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[Darren Qian]

I use 2010 Q1 Silverlight,
But i cannot find the GridViewExpandableRowStyle property.
Cause i want set the background of HierarchyChildTemplate as transparent.
How to fix it?

Thanks.

[Darren Qian]

I think i find some place to set the background of the space.

<Border Visibility="{Binding IsExpanded, Converter={StaticResource BooleanToVisibilityConverter}, RelativeSource={RelativeSource TemplatedParent}}" Grid.Column="2" Grid.ColumnSpan="2" Grid.Row="2" Background="{StaticResource GridView_HierarchyBackground}" BorderBrush="{StaticResource ControlOuterBorder}" BorderThickness="0,1" Padding="6">
     <ContentPresenter x:Name="PART_HierarchyChildPresenter"/>
    </Border>

I can set this background="{x:Null}" to let it be transparent, but it seens like another background behind this border.
How can set it transparent completely?

Thanks

[Kalin Milanov]

Hello Darren Qian,

The hierarchy border is rendered inside the row. Therefore setting its background to null will show the background of the row. You will have to set its background to null and the one of the grid itself as well to get the full transparency you want. However I fear the resulting grid might render unreadable if you are using it on a fairly dark background.

Let me know how this goes.

Greetings,
Kalin Milanov
the Telerik team

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