Combo in XamDataGrid | Infragistics Forums

I am using same code to bind editor combobox in xamdatagrid

But i am facing one issue first time when i clicked on that editable row it is hiding that window

Scnerio - I have a main window and i opened a child window in child i have a xamdatagrid and in that one column is State and want to change that state when i click on that state's column that child window is hide under main window,

Code:

<Window.Resources>
<ObjectDataProvider x:Key="DdApItem" ObjectType="{x:Type local:ClsVmpInvDtl}" />
<Style TargetType="ComboBox" x:Key="ComboStyle1">
                <Setter Property="ItemTemplate">
                    <Setter.Value>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <Border BorderThickness="0.5" BorderBrush="Black">
                                    <TextBlock Text="{Binding TaxCodeID}" Width="100" />
                                </Border>
                                <TextBlock Text="{Binding Description}" Width="auto" />
                            </StackPanel>
                        </DataTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
            <Style TargetType="{x:Type igEditors:XamNumericEditor}" x:Key="TaxItemComboBoxEditor">
                <Setter Property="EditTemplate">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type igEditors:XamNumericEditor}">
                            <StackPanel>
                                <ComboBox x:Name="cboComboboxEditor"
                                        DisplayMemberPath="TaxCodeID"
                                        SelectedValuePath="TaxCodeID"
                                      ItemsSource="{Binding Source={StaticResource DdApItem}, Path=DtTaxItems}"
                            SelectedValue="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Value, Mode=TwoWay}"
                            IsEditable="True" Style="{StaticResource ComboStyle1}" AlternationCount="2" Width="auto" />
                            </StackPanel>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
                <Setter Property="HorizontalContentAlignment" Value="Left"/>
            </Style>
</Window.Resources>

<igDP:XamDataGrid x:Name="XamDGPInv" Theme="Print Basic" GroupByAreaLocation="None"
                              AutoFit="True" Margin="9,224,18,66" Style="{StaticResource customBackground}" Grid.Column="1">

<igDP:Field Name="TaxCodeID" Label="Tax Code" Width="140">
                                <igDP:Field.Settings>
                                    <igDP:FieldSettings EditorStyle="{StaticResource ResourceKey=TaxItemComboBoxEditor}" />
                                </igDP:Field.Settings>
                            </igDP:Field>

</igDP:XamDataGrid>