DataGrid.ExpandRowGroup Method


Expands data grid row groups.

Namespace:  System.Windows.Controls
Assembly:  System.Windows.Controls.Data (in System.Windows.Controls.Data.dll)

public void ExpandRowGroup(
	CollectionViewGroup collectionViewGroup,
	bool expandAllSubgroups


Type: System.Windows.Data.CollectionViewGroup
The data in the row group.
Type: System.Boolean
true to expand all subgroups of the row group; otherwise, false.

You can call this method to programmatically expand row groups in a DataGrid control that contains grouped data. You can use the GetGroupFromItem method to get the particular group that a specified item belongs to. Alternatively, you can iterate through the Groups collection to expand all row groups.

The following example demonstrates how to expand all row groups in a DataGrid control. This example is part of a larger example available in the How to: Group, Sort, and Filter Data in the DataGrid Control topic.

private void ExpandButton_Click(object sender, RoutedEventArgs e)
    PagedCollectionView pcv = dataGrid1.ItemsSource as PagedCollectionView;
        foreach (CollectionViewGroup group in pcv.Groups)
            dataGrid1.ExpandRowGroup(group, true);
    catch (Exception ex)
        // Could not expand group.


Supported in: 5, 4, 3

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.