ToolStripDropDownItem.OnDropDownShow(EventArgs) Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
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 -> unitProtected Overridable 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' OnDropDownShow(EventArgs) method so that registered delegates receive the event.
| Product | 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, 10 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: