DataGrid: Selecting Multiple rows holding down the shift key

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Unplanned

Last Updated: 16 Jan 2026 10:45 by ADMIN

Leonard

Created on: 11 Aug 2025 15:36

Category: DataGrid

Type: Feature Request

DataGrid: Selecting Multiple rows holding down the shift key

I want to select multiple rows by selecting one and then holding down the shift key and selecting more.

For example in WPF DataGrid there is an Extended multiple selection option: https://docs.telerik.com/devtools/wpf/controls/radgridview/selection/multiple-selection

1 comment

ADMIN

Didi

Posted on: 16 Jan 2026 10:45

Solution:

1. use a custom CellTap command

2. In the Cell Tap Command Execute method define Routes to single or range selection based on Shift key state

public override void Execute(object parameter)
{
    if (!IsShiftKeyDown())
    {
        HandleSingleSelection(parameter);
        return;
    }

    HandleRangeSelection(parameter);
}

The Single Selection clears the selection and executes default tap behavior

The Range Selection:

- Gets anchor item

- Finds start/end indexes in data

- Clears selections, re-adds anchor

- Selects all items between anchor and clicked item

Here is the HandleRangeSelection implementation:

private void HandleRangeSelection(object parameter)
{
    var selectedItem = this.Owner.SelectedItem;
    if (selectedItem == null)
    {
        return;
    }

    var info = (DataGridCellInfo)parameter;
    var dataView = this.Owner.GetDataView();
    var items = dataView.Items.ToList();

    var lastSelectedIndex = items.IndexOf(selectedItem);
    var nextSelectedIndex = items.IndexOf(info.Item);

    if (lastSelectedIndex == -1 || nextSelectedIndex == -1)
    {
        return;
    }

    this.Owner.SelectedItems.Clear();
    this.Owner.SelectedItems.Add(selectedItem);
    SelectItemsInRange(items, lastSelectedIndex, nextSelectedIndex);
}

To access the IsShiftKeyDown internal method, you have to use a reflection:

private bool IsShiftKeyDown()
{
    var method = typeof(RadDataGrid).GetMethod("IsShiftKeyDown", BindingFlags.Instance | BindingFlags.NonPublic);
    return method?.Invoke(this.Owner, null) as bool? ?? false;
}

Regards,
Didi
Progress Telerik