ToolStripMenuItem.OnDropDownShow(EventArgs) Method

Definition

Raised in response to the ShowDropDown() method.

C#
protected override void OnDropDownShow (EventArgs e);

Parameters

e
EventArgs

An EventArgs that contains the event data.

Remarks

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnDropDownShow method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnDropDownShow(EventArgs) in a derived class, be sure to call the base class's OnDropDownShow(EventArgs) method so that registered delegates receive the event.

Applies to

Produit Versions
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9