i have xamdatagrid as follows

<igDP:XamDataGrid RecordContainerGenerationMode="Virtualize" PreviewMouseWheel="XamDataGrid_PreviewMouseWheel" InitializeRecord="XamDataGrid_InitializeRecord" GroupByAreaLocation="None"
DataSource="{Binding DeviceModelView.DeviceSDXOutputs}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" >
<igDP:XamDataGrid.FieldLayouts>
<igDP:FieldLayout IsDefault="True" x:Name="IOFunction">
<igDP:FieldLayout.Settings>
<igDP:FieldLayoutSettings RecordSelectorLocation="None" DataRecordPresenterStyle="{DynamicResource PCET_DataRecordPresenter}" AutoGenerateFields="False" AllowFieldMoving="No" MaxSelectedCells="0" MaxSelectedRecords="0"
DataRecordCellAreaStyle="{DynamicResource PCET_Mock_ReadOnlyDataRecordCellArea}"/>
</igDP:FieldLayout.Settings>
<igDP:FieldLayout.FieldSettings>
<igDP:FieldSettings LabelClickAction="Nothing" CellValuePresenterStyle="{DynamicResource PCET_TextReadOnly_CellValuePresenter}" AllowGroupBy="False" ExpandableFieldRecordExpansionMode="ExpandAlways" LabelPresenterStyle="{DynamicResource PCETLabelPresenterStyle}" AllowResize="False"/>
</igDP:FieldLayout.FieldSettings>
<igDP:FieldLayout.Fields>
<igDP:Field Label="{tp:Localize Name=InputValueHeader}" Width="5.3*" Name="Name" >
<igDP:Field.Settings>
<igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PCET_FunctionHeader_CellValuePresenter}"/>
</igDP:Field.Settings>
</igDP:Field>
<igDP:UnboundField Label="{tp:Localize Name=DeviceValueHeader}" Width="Auto" />
<igDP:UnboundField Label="{tp:Localize Name=DefaultValueHeader}" Width="2*" />
<igDP:UnboundField Label="{tp:Localize Name=RangeHeader}" Width="2*" >
<igDP:UnboundField.Settings>
<igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PCET_RangeHeader_CellValuePresenter}"/>
</igDP:UnboundField.Settings>
</igDP:UnboundField>
<igDP:Field Name="OutputAssignmentParameters"/>
</igDP:FieldLayout.Fields>
</igDP:FieldLayout>

<igDP:FieldLayout x:Name="IOSetting">
<igDP:FieldLayout.Settings>
<igDP:FieldLayoutSettings DataRecordPresenterStyle="{DynamicResource PCET_DataRecordPresenter}" AutoFitMode="ExtendLastField"
DataRecordCellAreaStyle="{DynamicResource PCET_AlarmModifiedDataRecordCellArea}"
LabelLocation="Hidden" SelectionTypeCell="None" SelectionTypeRecord="None"
AutoGenerateFields="False" AllowFieldMoving="No" MaxSelectedCells="0" MaxSelectedRecords="0" RecordSelectorLocation="None"/>
</igDP:FieldLayout.Settings>
<igDP:FieldLayout.FieldSettings>
<igDP:FieldSettings AllowResize="False" AllowGroupBy="False" CellValuePresenterStyle="{DynamicResource PCET_TextReadOnly_CellValuePresenter}"/>
</igDP:FieldLayout.FieldSettings>
<igDP:FieldLayout.Fields>
<igDP:UnboundField Label="{tp:Localize Name=InputValueHeader}" Width="5.5*" Binding="{Binding CurrentSettingValue}" >
<igDP:UnboundField.Settings>
<igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PCETSettingValueCellValuePresenter}"/>
</igDP:UnboundField.Settings>
</igDP:UnboundField>
<igDP:UnboundField Label="{tp:Localize Name=DeviceValueHeader}" Width="2*" Binding="{Binding DeviceValue}" >
<igDP:UnboundField.Settings>
<igDP:FieldSettings CellValuePresenterStyle="{DynamicResource PCET_DeviceValues_CellValuePresenter}"/>
</igDP:UnboundField.Settings>
</igDP:UnboundField>
<igDP:UnboundField Label="{tp:Localize Name=DefaultValueHeader}" Width="2*" Binding="{Binding DefaultValue}" />
<igDP:UnboundField Label="{tp:Localize Name=RangeHeader}" Width="2*" Binding="{Binding Range}"/>
</igDP:FieldLayout.Fields>
</igDP:FieldLayout>
</igDP:XamDataGrid.FieldLayouts>
</igDP:XamDataGrid>

in this grid each row will have a header and some list of items and each cell is templated according to data that comes from binded collection.

for example ,if one item type is range,then the cell will be a slider control,if it is collection ,then controll will be a drop down.

i need to navigate to each item using tab button .

pls share me if any idea..