DataGridComboBoxColumn ToolTip WPF

Question

У меня есть DataGrid, который связан с CollectionViewSource. CollectionViewSource связан с наблюдаемой коллекцией stabList.

В Grid у меня есть ComboBoxColumn, который связан со строковым свойством 'Code' из stabList. Источником свойства Code является список с именем pType. (Извините, соглашения об именах все еще относительно новы для C#)

У меня есть еще один список с именем pEType, который дает описания каждого элемента pType, который я хотел бы отобразить в качестве всплывающей подсказки при наведении мыши на каждый элемент в раскрывающемся списке. Я прочитал несколько ответов, начинающих использовать DataGRidTemplateColumn, но потом я не могу заставить данные отображаться правильно. Пожалуйста, вы можете помочь и, возможно, показать мне решение этой проблемы? Заранее спасибо.

  <CollectionViewSource x:Key="stabsView" Source="{Binding}" CollectionViewType="ListCollectionView" />

В ресурсах у меня есть EditingElementStyle

<Style  x:Key="StandardComboBox"  TargetType="ComboBox">
        <Setter Property="VerticalContentAlignment" Value="Center"/>
        <Setter Property="SelectedValue" Value="{Binding Code}"/>            
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate  TargetType="ComboBox">
                    <Grid>
                        <ToggleButton Name="ToggleButton" Foreground="Black" Template="{StaticResource ComboBoxToggleButton}" Focusable="false" IsChecked="{Binding Path=IsDropDownOpen,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press">
                        </ToggleButton>
                        <ContentPresenter  Name="ContentSite" IsHitTestVisible="False" Content="{TemplateBinding SelectionBoxItem}" ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}" Margin="3,3,23,3"  VerticalAlignment="Center" HorizontalAlignment="Left" />
                        <TextBox  OverridesDefaultStyle="True" VerticalContentAlignment="Center"  SelectionBrush="Gray" CaretBrush="Black" Margin="0,0,30,0" TextWrapping="NoWrap"   x:Name="PART_EditableTextBox" FontFamily="Trebuchet MS"  Foreground="Black" Style="{x:Null}" Template="{StaticResource ComboBoxTextBox}" HorizontalAlignment="Left" Focusable="True"  VerticalAlignment="Center"  FontSize="15"   Visibility="Hidden" IsReadOnly="{TemplateBinding IsReadOnly}"/>
                        <Popup Name="Popup"  Grid.ColumnSpan="2" Placement="Bottom"  IsOpen="{TemplateBinding IsDropDownOpen}" AllowsTransparency="True" Focusable="False" PopupAnimation="Slide">
                            <Grid Name="DropDown"   SnapsToDevicePixels="True" MaxWidth="{TemplateBinding ActualWidth}" MinWidth="{TemplateBinding ActualWidth}" MaxHeight="{TemplateBinding MaxDropDownHeight}">
                                <Border Grid.ColumnSpan="2" Grid.RowSpan="2" x:Name="DropDownBorder" SnapsToDevicePixels="True" Background="Transparent" MaxWidth="{TemplateBinding ActualWidth}" BorderThickness="1" BorderBrush="Black"/>
                                <ScrollViewer Grid.ColumnSpan="2" ScrollViewer.CanContentScroll="False"  Grid.Row="1" SnapsToDevicePixels="True">
                                    <StackPanel IsItemsHost="True" Background="#FF252526">
                                    </StackPanel>
                                </ScrollViewer>
                            </Grid>
                        </Popup>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsEditable" Value="true">
                            <Setter Property="IsTabStop" Value="false"/>
                            <Setter  TargetName="PART_EditableTextBox" Property="Background" Value="#FF007ACC"/>
                            <Setter TargetName="PART_EditableTextBox" Property="Visibility" Value="Visible"/>
                            <Setter TargetName="PART_EditableTextBox" Property="Foreground" Value="Black"/>
                            <Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
                        </Trigger>                           
                        <Trigger Property="HasItems" Value="false">
                            <Setter TargetName="DropDownBorder" Property="MinHeight" Value="95"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="IsTabStop" Value="false"/>
                            <Setter TargetName="PART_EditableTextBox" Property="Visibility" Value="Visible"/>
                            <Setter TargetName="PART_EditableTextBox" Property="Foreground" Value="White"/>
                            <Setter  TargetName="PART_EditableTextBox" Property="IsEnabled" Value="False"/>
                            <Setter  TargetName="PART_EditableTextBox" Property="Background" Value="White"/>
                            <Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
                        </Trigger>
                        <Trigger Property="IsGrouping" Value="true">
                            <Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
                        </Trigger>
                        <Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="true">
                            <Setter TargetName="DropDownBorder" Property="Margin" Value="0,2,0,0"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
        </Style.Triggers>            
    </Style>

DataGridComboBoxColumn

 <DataGridComboBoxColumn Header="Code" Width="*" x:Name="Code" SelectedValueBinding="{Binding Code}" EditingElementStyle="{StaticResource StandardComboBox}">

                            <DataGridComboBoxColumn.CellStyle>
                                <Style TargetType="DataGridCell">
                                    <Setter Property="Foreground" Value="White"/>
                                    <Setter Property="VerticalAlignment" Value="Center"/>
                                    <Setter Property="Background" Value="Transparent"/>
                                </Style>
                            </DataGridComboBoxColumn.CellStyle>
                        </DataGridComboBoxColumn>

из DataGrid

        <DataGrid  Padding="10" CanUserAddRows="False"  
                            ItemsSource="{Binding Source={StaticResource stabsView}}" AutoGenerateColumns="False"  x:Name="dgStabs" SelectionUnit="FullRow"  
                           CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserResizeRows="False"                               
                            CurrentCellChanged="dgStabs_CurrentCellChanged" Grid.ColumnSpan="2" RowHeaderWidth="5" 
                           PreviewMouseLeftButtonDown="DataGridCell_PreviewMouseLeftButtonDown" KeyUp="dgStabs_KeyUp" PreviewTextInput="DataGridCell_PreviewTextInput" GotFocus="dgStabs_GotFocus" >
                    <DataGrid.Columns>
                        <DataGridTextColumn CellStyle="{StaticResource DataGridTextColumn}"  Binding="{Binding EntryNo}" Header="No" IsReadOnly="True" Width="*"/>
                        <DataGridTextColumn CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding RecEntry}" Header="Rec.Entry" IsReadOnly="True" Width="*"/>
                        <DataGridComboBoxColumn Header="Code" Width="*" x:Name="Code" SelectedValueBinding="{Binding Code}" EditingElementStyle="{StaticResource StandardComboBox}">

                            <DataGridComboBoxColumn.CellStyle>
                                <Style TargetType="DataGridCell">
                                    <Setter Property="Foreground" Value="White"/>
                                    <Setter Property="VerticalAlignment" Value="Center"/>
                                    <Setter Property="Background" Value="Transparent"/>
                                </Style>
                            </DataGridComboBoxColumn.CellStyle>
                        </DataGridComboBoxColumn>
                        <DataGridCheckBoxColumn  Binding="{Binding Prox, UpdateSourceTrigger=PropertyChanged}"  Header="Prox" x:Name="Prox" Width="*"/>
                        <DataGridTextColumn CellStyle="{StaticResource DataGridTextColumn}"  Binding="{Binding Position}"  Header="Position"  Width="*"/>
                        <DataGridTextColumn  CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding Tip}" Header="Tip (mV)"    Width="*"/>
                        <DataGridTextColumn  CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding LineNo}" Header="Line No"   Width="*"/>
                        <DataGridTextColumn  CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding Exp}" Header="Exposure (%)"   Width="*"/>
                        <DataGridTextColumn CellStyle="{StaticResource DataGridTextColumn}"  Binding="{Binding Remote}" Header="Remote (mV)"   Width="*"/>
                        <DataGridTextColumn  CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding Field}" Header="Field (mV)"   Width="*"/>
                        <DataGridTextColumn  CellStyle="{StaticResource DataGridTextColumn}" Binding="{Binding LongTime}" Header="Time"  Width="*" />
                    </DataGrid.Columns>
                    <DataGrid.ContextMenu>
                        <ContextMenu>
                            <MenuItem  Header="Copy" x:Name="cmCopy" Click="cmCopy_Click" />
                            <MenuItem  Header="Paste" x:Name="cmPaste" Click="cmPaste_Click" />
                        </ContextMenu>
                    </DataGrid.ContextMenu>
                    <DataGrid.Resources>
                        <Style TargetType="DataGridRow">
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding Code}" Value="NV">
                                    <Setter Property="Background" Value="#FF8E8A8A"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Code}" Value="CS">
                                    <Setter Property="Background" Value="Green"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Code}" Value="CR">
                                    <Setter Property="Background" Value="Green"/>
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </DataGrid.Resources>
                </DataGrid>

В коде у меня есть

 Code.ItemsSource = MainWindow.pType;


        CollectionViewSource itemCollectionViewSource;
        itemCollectionViewSource = (CollectionViewSource)(FindResource("stabsView"));
        itemCollectionViewSource.Source = stabList;