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Expand the combobox and its items when it gets focus

Posted By:      Posted Date: September 08, 2010    Points: 0   Category :WPF
 
Hi, I want to expand the size of the combobox whenever the combobox gets the Focus. I have used the following code to expand the combobox height. <Style TargetType="{x:Type ComboBox}">     <Style.Triggers>         <Trigger Property="IsKeyboardFocusWithin" Value="True">             <Setter Property="RenderTransform">                <Setter.Value>                    <ScaleTransform ScaleX="1" ScaleY="2" />                </Setter.Value>            </Setter>            <Setter Property="RenderTransformOrigin" Value="0.5,0.5"/>             <Setter Property="Panel.ZIndex" Value="99999"/>         </Trigger>     </Style.Triggers>  </Style>   Problem: When i put the focus on the Combobox first time, the combobox item list opened in normal mode. But if i again click on the combobox then combobx item list opened and also list items are expanded. But i want the combobox list item


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