Sorting and Grouping in Descending Order in RadDataGrid

Updated on Sep 5, 2025

Environment

Version	Product	Author
11.1.0	DataGrid for .NET MAUI	Dobrinka Yordanova

Description

When the user groups the DataGrid through the UI, I need the groups to appear in descending order. Currently, the items are sorted by FirstContactDate in descending order, but when grouped, the grouping defaults to ascending order. The goal is to allow users to see the latest entries grouped by FirstContactDate in descending order.

This knowledge base article also answers the following questions:

• How to sort and group items in descending order in DataGrid?
• How to set group descriptors to descending order in Telerik DataGrid for .NET MAUI?
• How to change the group descriptor order dynamically during grouping?

Solution

To achieve sorting and grouping in descending order, follow one of the approaches below.

Option 1: Set Sort and Group Descriptors Explicitly

Define both SortDescriptors and GroupDescriptors with the desired SortOrder in the XAML configuration.

xaml

<telerik:RadDataGrid.GroupDescriptors>
    <telerik:PropertyGroupDescriptor PropertyName="FirstContactDate" SortOrder="Descending" />
</telerik:RadDataGrid.GroupDescriptors>

<telerik:RadDataGrid.SortDescriptors>
    <telerik:PropertySortDescriptor PropertyName="FirstContactDate" SortOrder="Descending" />
</telerik:RadDataGrid.SortDescriptors>

Option 2: Change Group Sort Order at Runtime

Use the GroupDescriptors.CollectionChanged event to dynamically update the SortOrder of the group descriptor when a column is grouped. For example:

csharp

public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
        BindingContext = new RegistrationViewModel();

        this.dataGrid.GroupDescriptors.CollectionChanged += GroupDescriptors_CollectionChanged;
    }

    private void GroupDescriptors_CollectionChanged(object? sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
    {
        if (e.Action != NotifyCollectionChangedAction.Add)
            return;
        
        var groupDescriptor = e.NewItems[0] as GroupDescriptorBase;
        if (groupDescriptor != null)
        {
            groupDescriptor.SortOrder = SortOrder.Descending;
        }
    }
}

See Also

• DataGrid Documentation