Auto expand hierarchical data rows in Xamdatarrid

Question

I have a Xamdatagrid having hierarchical data.I want to display all such records expended automatically.So that user doesn't have to click on + icon for each record.

Answer 1

Here is the simpler solution that worked for me.

In the XAML:

<!-- namespace -->
xmlns:ig="http://schemas.infragistics.com/xaml/wpf"

<ig:XamDataGrid>
  <ig:XamDataGrid.FieldSettings>
    <ig:FieldSettings ExpandGroupByRecordsByDefault="True" />
  </ig:XamDataGrid.FieldSettings>
</ig:XamDataGrid>

However, note that the property name is "GroupByRecords", so maybe it doesn't work if your records are not grouped.

Answer 2

The above answer is good but for those who prefer to see this as a defined behavior, here's another take at it:

public class AutoExpandXamDataGridRecordBehavior : Behavior<XamDataGrid>
{
    protected override void OnAttached()
    {
        if (AssociatedObject is XamDataGrid grid)
        {
            grid.InitializeRecord += OnInitializeRecord;
        }
    }


    protected override void OnDetaching()
    {
        if (AssociatedObject is XamDataGrid grid)
        {
            grid.InitializeRecord -= OnInitializeRecord;
        }
    }


    private void OnInitializeRecord(object sender, InitializeRecordEventArgs e)
    {
        ((XamDataGrid)sender).ExecuteCommand(DataPresenterCommands.ToggleRecordIsExpanded, e.Record);
    }
}

Answer 3

You can handle the XamDataGrid's InitializeRecord event (or override OnInitializeRecord) like so:

    void grid_InitializeRecord(object sender, Infragistics.Windows.DataPresenter.Events.InitializeRecordEventArgs e)
    {
        grid.ExecuteCommand(DataPresenterCommands.ToggleRecordIsExpanded, e.Record);
    }

There's also DataPresenterCommands.ExpandRecord, which expands the grid's ActiveRecord.