Infragistics XamDataGrid Group By on load in WPF

Question

How can I set a Group By on Load for a given property for the XamDataGrid from Infragistics, and making the view of this uncollapsed with the ability to collapse the group disabled? If this is possible I would know how I can hide the Group By small button as well.

My environment is WPF and C#.

Answer 1

Try this,

In Xaml,

<igDP:XamDataGrid x:Name="xdgSample" DataSource="{Binding SampleCollection}" InitializeRecord="xdgSample_InitializeRecord">
                                <igDP:XamDataGrid.FieldLayouts>
                                    <igDP:FieldLayout>     
                                        <igDP:Field Name="field1" Label="Field1"/>
                                        <igDP:Field Name="field2" Label="Field2"/>
                                        <igDP:Field Name="field3" Label="Field3"/>
                                        <igDP:Field Name="field4" Label="Field4"/>
                                        <igDP:Field Name="field5" Label="Field5"/>                                   
                                    </igDP:FieldLayout>
                                </igDP:XamDataGrid.FieldLayouts>
                                <igDP:XamDataGrid.FieldLayoutSettings>
                                    <igDP:FieldLayoutSettings AllowFieldMoving="No" 
                                                      AllowDelete="False"
                                                      AutoGenerateFields="False" 
                                                      AutoFitMode="ExtendLastField"
                                                      SelectionTypeRecord="Single" 
                                                      FilterUIType="LabelIcons"
                            GroupByExpansionIndicatorVisibility="Collapsed">
                                    </igDP:FieldLayoutSettings>
                                </igDP:XamDataGrid.FieldLayoutSettings>
                            </igDP:XamDataGrid>

In codebehind,

Private ObservableCollection<SampleBO> sampleCollection;

Public ObservableCollection<SampleBO> SampleCollection
{
    get
    {
        return this.sampleCollection;
    }   
}

You can put below code to load and grouping data in Window Loaded event or Constructor,

this.sampleCollection = your collection/List;
this.OnPropertyChange("SampleCollection");

this.xdgSample.FieldLayouts[0].SortedFields.Add(new FieldSortDescription
                        {
                            IsGroupBy = true,
                            Field = this.xamInputList.FieldLayouts[0].Fields["field2"],
                            Direction = System.ComponentModel.ListSortDirection.Ascending
                        });

                        this.xdgSample.FieldLayoutSettings.HeaderPlacement = HeaderPlacement.OnTopOnly;
                        this.xdgSample.FieldLayoutSettings.HeaderPlacementInGroupBy = HeaderPlacementInGroupBy.WithDataRecords;

Also,for expanded groups,use below event,it's for expanding group initially.

private void xdgSample_InitializeRecord(object sender, Infragistics.Windows.DataPresenter.Events.InitializeRecordEventArgs e)    
{    
if (e.Record.NestingDepth == 0)    
{    
    e.Record.IsExpanded = true;    
}    
}