Question

In .NET 4.0 WPF, how do you detect a double-click by the left mouse button?

A seemingly trivial task.

I don’t see a way of determining which button was pressed in the MouseDoubleClick event using the System.Windows.Input.MouseButtonEventArgs.

Answer 1

MouseDoubleClick passes MouseButtonEventArgs as the event arguments. This exposes the ChangedButton property, which tells you which button was double clicked.

void OnMouseDoubleClick(Object sender, MouseButtonEventArgs e)
{
    if (e.ChangedButton == MouseButton.Left)
    {
        // Left button was double clicked
    }
}