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FrameworkContentElement.ToolTipOpening Event

Occurs when any tooltip on the element is opened.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

member ToolTipOpening : IEvent<ToolTipEventHandler,
    ToolTipEventArgs>
<object ToolTipOpening="ToolTipEventHandler" .../>

Identifier field

ToolTipOpeningEvent

Routing strategy

Direct

Delegate

ToolTipEventHandler

To manually open tooltips, handlers of the events should mark the relevant event as handled. Otherwise, the value of the ToolTip property will be used to automatically open a context menu. Marking the event handled will effectively cancel the default action, and could be an opportunity to reset the value of the ToolTip property and then open the new ContextMenu. Note that this event will not be raised if ToolTip is a null reference or otherwise unset.

This event cannot be an EventTrigger in a style. This is because the identifier field of this event re-uses an implementation from a service that does not expose add/remove methods on the event.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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