How to perform range selection with shift key in .NET MAUI DataGrid SfDataGrid?

This article shows how to implement Range Selection with the Shift key in Syncfusion .NET MAUI DataGrid (SfDataGrid). It demonstrates how a user can select rows continuously using the Shift key and the Arrow Up key. Similarly, deselection of rows continuously can also be done using the Shift key and the Arrow Down key.

Xaml

<ContentPage.BindingContext>
    <local:OrderInfoRepository x:Name="viewModel" />
</ContentPage.BindingContext>

<ContentPage.Content>
    <syncfusion:SfDataGrid x:Name="dataGrid"
                       SelectionMode="Multiple"
                       ItemsSource="{Binding OrderInfoCollection}">
    </syncfusion:SfDataGrid>
</ContentPage.Content>

Xaml.cs

public partial class MainPage : ContentPage
{
    readonly CustomRowSelectionController customRowSelectionController;

    public MainPage()
    {
        InitializeComponent();
        customRowSelectionController = new CustomRowSelectionController(dataGrid);
        dataGrid.SelectionController = customRowSelectionController;
#if WINDOWS
        dataGrid.HandlerChanged += DataGrid_HandlerChanged;
#endif
    }
#if WINDOWS
    private void DataGrid_HandlerChanged(object? sender, EventArgs e)
    {
        if (dataGrid?.Handler?.PlatformView is FrameworkElement nativeElement)
        {
            nativeElement.KeyUp += DataGrid_KeyUpEvent;
            nativeElement.KeyDown += DataGrid_KeyDownEvent;
        }
    }

    private void DataGrid_KeyUpEvent(object sender, Microsoft.UI.Xaml.Input.KeyRoutedEventArgs e)
    {
        if (e.Key == Windows.System.VirtualKey.Shift)
        {
            customRowSelectionController._isShiftPressed = false;
        }
    }

    private void DataGrid_KeyDownEvent(object sender, Microsoft.UI.Xaml.Input.KeyRoutedEventArgs e)
    {
        if (e.Key == Windows.System.VirtualKey.Shift)
        {
            customRowSelectionController._isShiftPressed = true;
        }
    }
#endif
}

CustomRowSelectionController.cs

public class CustomRowSelectionController : DataGridRowSelectionController
{
	private SfDataGrid grid;
	public bool _isShiftPressed { get; set; }

	public CustomRowSelectionController(SfDataGrid dataGrid) : base(dataGrid)
	{
		this.grid = dataGrid;
	}

	public override void HandlePointerOperation(RowColumnIndex rowColumnIndex)
	{
		if (_isShiftPressed)
		{
			if (grid.SelectedRows.Count > 0)
			{
				var selectedRow = grid.SelectedRows[0] as OrderInfo;
				var selectCollection = new ObservableCollection<object>();
				var startIndex = (grid.ItemsSource as ObservableCollection<OrderInfo>)!.IndexOf(selectedRow);
				var endIndex = grid.ResolveToRecordIndex(rowColumnIndex.RowIndex);
				for (int i = startIndex; i <= endIndex; i++)
				{
					selectCollection.Add(grid.View!.Records[i].Data);
				}
				grid.SelectedRows = selectCollection;
				return;
			}

		}
		base.HandlePointerOperation(rowColumnIndex);
	}
}

ScreenShot

Here is the expected output when executing the sample:

View sample in GitHub

Take a moment to explore this documentation, where you can find more information about Syncfusion .NET MAUI DataGrid (SfDataGrid) with code examples. Please refer to this link to learn about the essential features of Syncfusion .NET MAUI DataGrid (SfDataGrid).

Conclusion

I hope you enjoyed learning about How to implement select all checkbox column in SfDataGrid.

You can refer to our .NET MAUI DataGrid’s feature tour page to learn about its other groundbreaking feature representations. You can also explore our .NET MAUI DataGrid Documentation to understand how to present and manipulate data. For current customers, you can check out our .NET MAUI components on the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to explore our .NET MAUI DataGrid and other .NET MAUI components.

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