How to Programmatically show a WPF/C# Windows.Control.ToolTip?

Question

There doesn\'t seem to be a .Show() kind of method for the Windows.Control.ToolTip, incl in ToolTipService.

Answer 1

If you would like to control how long the tooltip remains open, you can subscribe to the Opened event and set a time delay before closing the tooltip.

Subscription has to be done before IsOpen = true and it has to be an async method to avoid hanging up the UI.

var tooltip = new ToolTip { Content = "New tooltip text" };
MyControln.ToolTip = tooltip;
tooltip.Opened += async delegate (object o, RoutedEventArgs args)
{
    var s = o as ToolTip;
    // let the tooltip display for 1 second
    await Task.Delay(1000);
    s.IsOpen = false;
    // wait till the close tooltip animation finishes before changing to old tooltip text
    await Task.Delay(1000);
    s.Content = "Old tooltip text";
};
tooltip.IsOpen = true;