ComboBoxItem.IsHighlighted Property

This property can be used by styles that need a highlight to indicate selection.

Starting with the .NET Framework version 3.0 Service Pack 1, IsHighlighted has a protected setter. To use this functionality, your application should target the .NET Framework version 3.5.  For more information, see .NET Framework 3.5 Architecture.

The following example changes the appearance of a ComboBoxItem when IsHighlighted is true.

<ComboBox>
  <ComboBox.Resources>
    <Style TargetType="ComboBoxItem">
      <Style.Triggers>
        <Trigger Property="IsHighlighted" Value="True">
          <Setter Property="FontWeight" Value="Bold"/>
          <Setter Property="Foreground" Value="Red"/>
        </Trigger>
      </Style.Triggers>
    </Style>
  </ComboBox.Resources>
  <ComboBoxItem  Name="cbi1">Item1</ComboBoxItem>
  <ComboBoxItem  Name="cbi2">Item2</ComboBoxItem>
  <ComboBoxItem  Name="cbi3">Item3</ComboBoxItem>
</ComboBox>

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Reference