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Ticket T900302
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MultiRow select not working with Shift/Ctrl + click?

created 5 years ago

Hello,

In my project I have a GridControl in which multiple rows should be selected.
When I make use of the SelectionMode="Row", this works as expected with selecting multiple rows CTRL click to select one by one or SHIFT click to select an range.

However I would also like to use the user-friendlyness of the SelectionMode="Row" which removes the need of holding CTRL, but still gives you the SHIFT click functionality, this however does not work.

Is there any reasoning behind this or is this a bug?

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Answers approved by DevExpress Support

created 5 years ago

Hello,

As far as I understand you meant MultipleRow selection mode in the second case. This mode really does not support Shift key selection. However, you can implement it manually by handling the PreviewMouseDown event for GridControl. For example:

C#
private void GridControl_PreviewMouseDown(object sender, MouseButtonEventArgs e) {
    if (Keyboard.Modifiers == ModifierKeys.Shift && e.ChangedButton == MouseButton.Left) {
        var hitTest = view.CalcHitInfo(e.GetPosition(view));
        if (hitTest.InRow) {
            if (grid.SelectedItem == null)
                grid.SelectItem(hitTest.RowHandle);
            grid.SelectRange(grid.GetRowHandleByListIndex(((IList)grid.ItemsSource).IndexOf(grid.SelectedItem)), hitTest.RowHandle);
        }
    }
}

Alternatively, you can revert SelectionMode to Row and use the same event to customize row selection as required.

Let me know if this approach is suitable.

See also:
Hit Information

    Comments (2)
    R R
    RekenD 5 years ago

      Hello Dima,

      Thank you for your response!
      I did indeed mean the MultipleRow, my apologies for the mistake.

      Is there any reason why it is not implemented by default? Before I wanted to implement it myself, I wanted to make sure that I did not miss anything on the control.
      However I will then indeed implement the event myself with the code you provided.

      Dima (DevExpress Support) 5 years ago

        You're always welcome.

        We implemented MultipleRow SelectionMode similarly to the standard controls' behavior. Typically, it is required to check a check box to select a row in this mode. Thus, the Shift key is not useful in this case.

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