ToolStripItem.OnClick(EventArgs) Method
Definition
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.
Raises the Click event.
protected:
virtual void OnClick(EventArgs ^ e);
protected virtual void OnClick (EventArgs e);
abstract member OnClick : EventArgs -> unit
override this.OnClick : EventArgs -> unit
Protected Overridable Sub OnClick (e As EventArgs)
Parameters
Examples
The following code example demonstrates how to override the OnClick method. This code example is part of a larger example provided for the ToolStripItem class.
// The method defines the behavior of the Click event.
// It simply toggles the state of the clickedValue field.
protected override void OnClick(EventArgs e)
{
base.OnClick(e);
this.clickedValue ^= true;
}
' The method defines the behavior of the Click event.
' It simply toggles the state of the clickedValue field.
Protected Overrides Sub OnClick(e As EventArgs)
MyBase.OnClick(e)
Me.clickedValue = Me.clickedValue Xor True
End Sub
Remarks
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnClick 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 OnClick(EventArgs) in a derived class, be sure to call the base class's OnClick(EventArgs) method so that registered delegates receive the event.
Applies to
Σχόλια
https://aka.ms/ContentUserFeedback.
Σύντομα διαθέσιμα: Καθ' όλη τη διάρκεια του 2024 θα καταργήσουμε σταδιακά τα ζητήματα GitHub ως μηχανισμό ανάδρασης για το περιεχόμενο και θα το αντικαταστήσουμε με ένα νέο σύστημα ανάδρασης. Για περισσότερες πληροφορίες, ανατρέξτε στο θέμα:Υποβολή και προβολή σχολίων για