ToolStripDropDownItem.OnDropDownShow(EventArgs) Method

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Important

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Raised in response to the ShowDropDown() method.

protected:
 virtual void OnDropDownShow(EventArgs ^ e);

protected virtual void OnDropDownShow (EventArgs e);

abstract member OnDropDownShow : EventArgs -> unit
override this.OnDropDownShow : EventArgs -> unit

Protected Overridable Sub OnDropDownShow (e As EventArgs)

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' OnDropDownShow(EventArgs) method so that registered delegates receive the event.

Applies to

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