ToolStripMenuItem.OnDropDownShow(EventArgs) Method
Important
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Raised in response to the ShowDropDown() method.
protected:
override void OnDropDownShow(EventArgs ^ e);
protected override void OnDropDownShow (EventArgs e);
override this.OnDropDownShow : EventArgs -> unit
Protected Overrides Sub OnDropDownShow (e As EventArgs)
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.
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.
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 |
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