How can DataGridComboBoxColumn style be changed?

I need to change border style to invisible on "DataGridComboBoxColumn"... How can I do it? I hope there is another way then changing to datagridTemplate and put combobox el开发者_开发知识库ement with my style inside....

You can try this solution: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/a5777acb-ef85-40e3-b371-d803cbe26763/

I needed to add .EditingElementStyle

<wpfToolkit:DataGridComboBoxColumn x:Name="dgcSource" Header="Source"
      SelectedValueBinding="{Binding ObjectItemSourceId, TargetNullValue=0}" 
      SelectedValuePath="ID"
      DisplayMemberPath="Name"
      SortMemberPath="SourceName">
    <wpfToolkit:DataGridComboBoxColumn.EditingElementStyle>
        <Style TargetType="ComboBox">
            <Setter Property="BorderBrush" Value="Transparent"/>
        </Style>
    </wpfToolkit:DataGridComboBoxColumn.EditingElementStyle>
</wpfToolkit:DataGridComboBoxColumn>