Hello,

I have implemented a cell merging in my XamDataGrid. I overrode the default Infragistics template to provide functionality that adds custom border if there is a property "DropTargetType" in the underlying row equal to custom enum "DropTargetType.Regular".

BUT, there is strange behavior I don't know how to deal with: the merged cell style's DataContext is set to the last of merged rows. How can I change this DataContext to the first merged row?

There is a simple code I use. It works correctly if the property in the last of merged rows "DropTargetType" is equal to "DropTargetType.Regular". However, I would like it to be dependent on the first merged row.

    <Style TargetType="{x:Type igDP:MergedCellPresenter}" x:Key="DefaultMergedCellPresenter">
        <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellBackgroundKey}}"/>
        <Setter Property="BorderBrush" Value="{StaticResource CellItemNormalBorderBrush}"/>
        <Setter Property="BorderThickness" Value="0 0 1 1"/> <!--Econosim change-->
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type igDP:MergedCellPresenter}">
                    <!--change start-->
                    <Border
                        x:Name="DropTargetBorder"
                        BorderThickness="0 0 0 0"
                        BorderBrush="Black">
                    <!--change end-->
                    <Border Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            >
                        <igDP:CellValuePresenter x:Name="PART_CellValuePresenter"
                            Field="{TemplateBinding Field}"
                            Value="{TemplateBinding Value}"                     
                            BorderThickness="0"
                            IsMergedCell="True"/>
                    </Border>
                    </Border>
                    <ControlTemplate.Triggers>
                        <!--change start-->
                        <DataTrigger Binding="{Binding DataItem.DropTargetType}" Value="{x:Static utils:DropTargetType.Regular}">
                            <Setter Property="BorderThickness" Value="0 1 0 0" TargetName="DropTargetBorder"/>
                        </DataTrigger>
                        <!--change end-->

                        <Trigger Property="IsOpacityReduced" Value="True">
                            <Setter TargetName="PART_CellValuePresenter" Property="Opacity" Value="0.35"/>
                        </Trigger>
                        <Trigger Property="IsFieldSelected" Value="True">
                            <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellFieldSelectedBackgroundKey}}"/>
                            <Setter Property="BorderBrush" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellFieldSelectedBorderBrushKey}}"/>
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsFixed" Value="True"/>
                                <Condition Property="IsRecordSelected" Value="False"/>
                                <Condition Property="IsSelected" Value="False"/>
                                <Condition Property="IsFieldSelected" Value="False"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellFieldFixedBackgroundKey}}"/>
                            <Setter Property="BorderBrush" Value="{StaticResource CellItemNormalBorderBrush}"/>
                        </MultiTrigger>
                        <Trigger Property="IsRecordSelected" Value="True">
                            <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellRecordSelectedBackgroundKey}}"/>
                            <Setter Property="BorderBrush" Value="{StaticResource CellItemNormalBorderBrush}"/>
                        </Trigger>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.MergedCellSelectedBackgroundKey}}"/>
                            <Setter Property="BorderBrush" Value="{StaticResource CellItemNormalBorderBrush}"/>
                        </Trigger>

                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

Best regards,

Mateusz