In DoSomethigInGrid(), before you are accessing the presenter , update the grid layout using xamDataGrid1.UpdateLayout();

For a similar problem of mine, the presenter had a value after the grid layout was updated.

Hi, Joe

I wrote a sample.

1. if(xamDataGrid1.FieldLayouts[0].DataPresenter.Records[0] != null)

{

DataRecordPresenter drp1 =

DataRecordPresenter.FromRecord(xamDataGrid1.FieldLayouts[0].DataPresenter.Records[0])

as DataRecordPresenter;

if (drp1 != null)

drp1.Background = Brushes.Red;

}

//Result : drp1 =null

2. problem with grouping: first group by "Date" column, next grope by Id_t2; As a result "Groups for Id_t2" we have for each "Date", but not only for some "Group for Date".

Best regards,

Hi -

Even though you have posted the relevant portions of your application here, it is not possible to tell from the code when these routines are being called.  At this point, I think the best thing to do is to post a simple (but complete) Visual Studio sample project that demonstrates the problem and I will be happy to take a look at it.

Joe

Hi, Joe

<igDP:XamDataGrid x:Name="xamDataGrid1"

GroupByAreaLocation="AboveDataArea"

<igDP:FieldSettings

AllowEdit="False"

ExpandableFieldRecordExpansionMode="ExpandAlways"

</igDP:XamDataGrid.FieldSettings>

<igDP:FieldLayoutSettings HighlightAlternateRecords="True" />

<igDP:FieldLayout Key="FieldLayout11">

</igDP:XamDataGrid.FieldLayouts>

<igDP:XamDataGrid x:Name="xamDataGrid2"

GroupByAreaLocation="AboveDataArea"

<igDP:FieldSettings

AllowEdit="False"

ExpandableFieldRecordExpansionMode="ExpandAlways"

</igDP:XamDataGrid.FieldSettings>

<igDP:FieldLayoutSettings HighlightAlternateRecords="True" />

<igDP:FieldLayout Key="FieldLayout12">

</igDP:XamDataGrid.FieldLayouts>

<igDP:XamDataGrid x:Name="xamDataGrid3"

GroupByAreaLocation="AboveDataArea"

<igDP:FieldSettings

AllowEdit="False"

ExpandableFieldRecordExpansionMode="ExpandAlways"

</igDP:XamDataGrid.FieldSettings>

<igDP:FieldLayoutSettings HighlightAlternateRecords="True" />

<igDP:FieldLayout Key="FieldLayout13">

</igDP:XamDataGrid>

(xamDataGrid2.FieldLayouts[0].DataPresenter.Records[0] as DataRecord).IsActive = true;

(xamDataGrid1.FieldLayouts[0].DataPresenter.Records[0] as DataRecord).IsSelected = true;

DataRecordPresenter.FromRecord(xdg.ActiveRecord) as DataRecordPresenter;