Alex,

I tried your way but seems like it doesn't work...I attached my codes. can u pls take a look.

Thanks a lot.   

<igDP:XamDataGrid Grid.Row="1"
                        x:Name="xamDataGrid"
                        Theme="Aero"
                        AutoFit="False"
                        ContextMenu="{x:Null}"
                        SnapsToDevicePixels="True"
                        ScrollingMode="Immediate"
                        AllowDrop="True"
                        RecordContainerGenerationMode="Recycle"
                        CellContainerGenerationMode="Recycle"
                                RecordLoadMode="LoadOnDemand"
                        Background="Gray"
                       
                        DragOver="OnDragOver"
                        Drop="OnDataDrop"
                        PreviewMouseDown="OnXamDataGridPreviewMouseDown"
                        PreviewMouseMove="OnXamDataGridPreviewMouseMove"
                        PreviewMouseUp="OnXamDataGridPreviewMouseUp"
                        MouseDoubleClick="OnGridMouseDoubleClick"
                        MouseRightButtonDown="OnGridMouseRightButtonDown"
                        IsGroupByAreaExpanded="False">

        <igDP:XamDataGrid.Resources>
          <Style TargetType="{x:Type igDP:RecordSelector}">
            <Setter Property="Template">
              <Setter.Value>
                <ControlTemplate TargetType="{x:Type igDP:RecordSelector}">
                  <CheckBox
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    IsChecked="{Binding Path=DataItem.IsChecked}"
                    Checked="OnChecked"
                    Unchecked="OnUnChecked"
                  >
                  </CheckBox>
                </ControlTemplate>
              </Setter.Value>
            </Setter>
          </Style>
          <Style TargetType="{x:Type igDP:DataRecordPresenter}">
            <Setter Property="Margin" Value="80,0,0,0"/>
          </Style>
        </igDP:XamDataGrid.Resources>
       
        <igDP:XamDataGrid.FieldLayoutSettings>
          <igDP:FieldLayoutSettings
                  DataRecordSizingMode="SizedToContentAndIndividuallySizable"
                  AutoGenerateFields="True"
                  RecordSelectorLocation="LeftOfCellArea"
                  ResizingMode="Default"
                 
                  SelectionTypeRecord="Extended"
                  SelectionTypeField="Extended"
                  DataRecordPresenterStyle="{StaticResource headerStyle}"
                  DataRecordCellAreaStyle="{StaticResource rowStyle}"
                  SelectionTypeCell="Extended"/>
        </igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:XamDataGrid.FieldSettings>
          <igDP:FieldSettings
                      AllowEdit="False"
                      CellClickAction="SelectRecord"
                      CellMinWidth="0"
                      AllowCellVirtualization="true"
                      CellValuePresenterStyle="{StaticResource cellStyle}"
                      LabelPresenterStyle="{StaticResource columnStyle}"/>
          <!--CellValuePresenterStyle="{StaticResource cellStyle}"-->
        </igDP:XamDataGrid.FieldSettings>
      </igDP:XamDataGrid>

Hello,

I am not sure that will do the trick. The margins are respectively (left, top, right, bottom) and this way you will set the top margin of the parent record. Another way to do this is to rezise the first column. Here is what I mean:

In the beginning, all of the records (parent and child) are lined up. Then you push the child record to the right with, let's say 20. So, if you resize the first cell ( take out 20 of its ActualWidth) the rest of the fields will line up again. Will this work in your scenario?

Alex.

Alex,

Actually I meant (0,0,20,0) not (0,20,0,0). Sorry about confusing.

About your way (decrease the first column of child row) which point can I do this? I mean in XMAL or code-behide? If Code-behide any event-handler you suggest?

Many Thanks

If you will not be changing this cell's width, you can set it in the XAML. If you need to change it in runtime, you can use InitializeRecord event.

Alex.

I wrote handler as below...But it doesn't work...any idea?

Thanks

        void OnInitializeRecord(object sender, Infragistics.Windows.DataPresenter.Events.InitializeRecordEventArgs e)
        {
            DataRecord dr = e.Record as DataRecord;

            if (dr != null && dr.ParentRecord != null)
                dr.Cells[0].Field.Settings.LabelWidth = dr.Cells[0].Field.Settings.LabelWidth - 20;

        }

also tried cellwidth...no luck...guess the way i set width of cell is wrong?

Try changing both like CellWidht and LabelWidth

Note: make sure you have defined the fields and CellWidth and LabelWidth in the xaml, otherwise these numbers will be NaN and nothing will happen.

Alex.