I am using XamDataDataGrid(NetAdvantage for WPF 2008 Vol. 1 Express Hotfix).

My XamDataGrid has cells it has combobox. combobox has items it is generated by object provider.

but, Sometimes, My XamDataGrid can not display items of combobox.

My Code is follows.

            <igDP:XamDataGrid.Resources>
                <ObjectDataProvider x:Key="odpPartitionList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetPartitionList"/>
                <ObjectDataProvider x:Key="odpZoneList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetZoneList"/>
                <ObjectDataProvider x:Key="odpPanelList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetPanelList"/>
                <ObjectDataProvider x:Key="odpConsoleList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetConsoleList"/>
                <ObjectDataProvider x:Key="odpIOPortList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetIOPortList"/>
                <ObjectDataProvider x:Key="odpDoorList" ObjectType="{x:Type dev718plus:Programmer}" MethodName="GetDoorList"/>

           </igDP:XamDataGrid.Resources>

           .................................................................

                <Style x:Key="WhenInfoCellValueEditorStyle" TargetType="{x:Type igDP:CellValuePresenter}">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding Path=Cells[Action].Value}" Value="6">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="{x:Type igDP:CellValuePresenter}">
                                        <Grid>
                                            <ComboBox Grid.Column="0" ItemsSource="{Binding Source={StaticResource odpPanelList}}"
                                                      BorderThickness="0"                                                     
                                                      IsSynchronizedWithCurrentItem="True"
                                                      DisplayMemberPath="Text"
                                                      SelectedValuePath="Value"
                                                      SelectedValue="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Value.[0], Mode=TwoWay,
                                                                                  UpdateSourceTrigger=PropertyChanged}"/>
                                        </Grid>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </DataTrigger>

The odpPartitionList is normal. but, The odpPanelList is abnormal. however, somtimes, The odpPanelList is normal