<toolkit:DataGridComboBoxColumn x:Name="DgCbcSignal" Header="信号源"

                                                        SelectedItemBinding="{Binding SelectedSignal}"

                                                        >

                            <toolkit:DataGridComboBoxColumn.ElementStyle>

                                <Style TargetType="ComboBox">

                                    <Setter Property="ItemsSource" Value="{Binding Path=Signals}" />

                                </Style>

                            </toolkit:DataGridComboBoxColumn.ElementStyle>

                            <toolkit:DataGridComboBoxColumn.EditingElementStyle>

                                <Style TargetType="ComboBox">

                                    <Setter Property="ItemsSource" Value="{Binding Path=Signals}" />

                                </Style>

                            </toolkit:DataGridComboBoxColumn.EditingElementStyle>

                        </toolkit:DataGridComboBoxColumn>