ComponentChangingEventHandler Delegate
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ComponentChangingEventHandler Delegate

 

Represents the method that will handle a ComponentChanging event.

Namespace:   System.ComponentModel.Design
Assembly:  System (in System.dll)

[ComVisibleAttribute(true)]
[HostProtectionAttribute(SecurityAction::LinkDemand, SharedState = true)]
public delegate void ComponentChangingEventHandler(
	Object^ sender,
	ComponentChangingEventArgs^ e
)

Parameters

sender
Type: System::Object^

The source of the event.

e
Type: System.ComponentModel.Design::ComponentChangingEventArgs^

A ComponentChangingEventArgs event that contains the event data.

When you create a ComponentChangingEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see NIB: Events and Delegates.

This example demonstrates registering a ComponentChangingEventHandler and handling the ComponentChanging event.

public:
   void LinkComponentChangingEvent( IComponentChangeService^ changeService )
   {
      // Registers an event handler for the ComponentChanging event.
      changeService->ComponentChanging += gcnew ComponentChangingEventHandler(
         this, &ComponentChangingEventHandlerExample::OnComponentChanging );
   }

private:
   void OnComponentChanging( Object^ sender, ComponentChangingEventArgs^ e )
   {
      // Displays changing component information on the console.
      Console::WriteLine( "Type of the component that is about to change: " +
         e->Component->GetType()->FullName );
      Console::WriteLine( "Name of the member of the component that is about to change: " +
         e->Member->Name );
   }

.NET Framework
Available since 1.1
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