How to know when a DataGridRow is clicked?

Question

I am using the Windows Community Toolkit WinUI DataGrid control. I would like to run some code when a row is clicked. How can I do that?

I have tried:

SelectionChanged event: Only works the first time the row is clicked, as after that the same row is being selected. Also gets triggered if the row is moved to via the keyboard.
CurrentCellChanged event: Only works the first time a cell is clicked, as after that clicking the same cell does not change the current cell. (And I could not find a way to clear the current cell programmatically.)
Answers like this show how to add row event handlers via style in WPF, but this does not work in WinUI.

Any ideas?

score 2 · Accepted Answer · answered Dec 21 '21 at 20:29

I ended up using the PointerReleased event. (Previously I had discarded this event as I could not figure out which row was clicked.)

<ctWinUI:DataGrid
    PointerReleased="dgDesktops_PointerReleased"
    ...>

And to find the DataGridRow that was clicked I traverse the visual tree:

private async void dgDesktops_PointerReleased(object sender, PointerRoutedEventArgs e)
{
    DataGridRow clickedRow = ViewUtils.FindParent<DataGridRow>((UIElement)e.OriginalSource);
    if (clickedRow != null)
    {
        MyModel rowModel = (MyModel)clickedRow.DataContext;
        // Do stuff
    }
}

public static T FindParent<T>(DependencyObject childElement) where T : Control
{
    DependencyObject currentElement = childElement;

    while (currentElement != null)
    {
        if (currentElement is T matchingElement)
        {
            return matchingElement;
        }

        currentElement = VisualTreeHelper.GetParent(currentElement);
    }

    return null;
}

Not the most elegant solution, but it works :)

How to know when a DataGridRow is clicked?

1 Answers1