DataGrid Cell.Enabled binding

            <xcdg:DataGridControl Name="dataGridParam" FontFamily="Arial" FontSize="14" Foreground="Black"
                              AlternationCount="1" AutoCreateColumns="False" FontWeight="Bold"
                              ItemsSource="{Binding Path=ParameterValues, UpdateSourceTrigger=PropertyChanged}" IsRefreshCommandEnabled="False" IsCopyCommandEnabled="False" SelectionUnit="Row"
                              SelectionMode="Single" SelectedItem="{Binding Path=SelectedExamination}" TabIndex="1" ext:RightClickSelects.Enabled="True" SelectionChanged="dataGrid_SelectionChanged">
                <xcdg:DataGridControl.Resources>
                    <DataTemplate x:Key="ValueCell">
                        <TextBox Text="{Binding Path=., Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
                            <TextBox.Style>
                                <Style TargetType="TextBox">
                                    <Style.Setters>
                                        <Setter Property="IsEnabled" Value="True"/>
                                    </Style.Setters>
                                    <Style.Triggers>
                                        <DataTrigger Binding="{Binding Path=DataContext.Param.IS_COMPUTED, Converter={StaticResource ShortToBoolConv}, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=xcdg:DataCell}}" Value="True">
                                            <Setter Property="IsEnabled" Value="False"/>
                                        </DataTrigger>
                                    </Style.Triggers>
                                </Style>
                            </TextBox.Style>
                        </TextBox>
                    </DataTemplate>
                </xcdg:DataGridControl.Resources>
                <xcdg:DataGridControl.View>
                    <xcdg:TableView ColumnStretchMode="None" IsAlternatingRowStyleEnabled="True" UseDefaultHeadersFooters="False"
                                    HorizontalGridLineThickness="1" VerticalGridLineThickness="1">
                        <xcdg:TableView.HorizontalGridLineBrush>
                            <SolidColorBrush Color="DarkCyan"/>
                        </xcdg:TableView.HorizontalGridLineBrush>
                        <xcdg:TableView.VerticalGridLineBrush>
                            <SolidColorBrush Color="DarkCyan"/>
                        </xcdg:TableView.VerticalGridLineBrush>
                        <xcdg:TableView.FixedHeaders>
                            <DataTemplate>
                                <xcdg:ColumnManagerRow/>
                            </DataTemplate>
                        </xcdg:TableView.FixedHeaders>
                    </xcdg:TableView>
                </xcdg:DataGridControl.View>

                <xcdg:DataGridControl.Columns>
                    <xcdg:Column FieldName="Param.NAME" Title="Показатель" Width="7*" ReadOnly="True"/>
                    <xcdg:Column FieldName="VAL" Title="Значение" Width="4*" ReadOnly="True" CellContentTemplate="{StaticResource ValueCell}"/>
                    <xcdg:Column FieldName="Param.MEASUREMENT" Title="Единица" Width="3*" ReadOnly="True"/>
                </xcdg:DataGridControl.Columns>
            </xcdg:DataGridControl>

            <Button Margin="2" Grid.Row="1" Content="Сохранить изменения" Command="{Binding Path=SaveAllParamValues}"/>
        </Grid>