EventHandlerExtensionsGetHandlerTDelegate Method

Gets the event handler of the specified type from the EventHandlerList instance.

Definition

Namespace: KGySoft.WinForms
Assembly: KGySoft.WinForms (in KGySoft.WinForms.dll) Version: 5.0.1

C#

public static TDelegate GetHandler<TDelegate>(
	this EventHandlerList? handlers,
	Object key
)
where TDelegate : Delegate

VB

<ExtensionAttribute>
Public Shared Function GetHandler(Of TDelegate As Delegate) ( 
	handlers As EventHandlerList,
	key As Object
) As TDelegate

C++

public:
[ExtensionAttribute]
generic<typename TDelegate>
where TDelegate : Delegate
static TDelegate GetHandler(
	EventHandlerList^ handlers, 
	Object^ key
)

F#

[<ExtensionAttribute>]
static member GetHandler : 
        handlers : EventHandlerList * 
        key : Object -> 'TDelegate  when 'TDelegate : Delegate

Parameters

handlers EventHandlerList: The EventHandlerList instance to het the handler delegate from.
key Object: The same key that is used for the AddHandler(Object, Delegate) and RemoveHandler(Object, Delegate) methods when the event is subscribed or unsubscribed.

Type Parameters

TDelegate: The delegate type of the event handler.

Return Value

TDelegate
The event handler delegate of the specified type, or if no such handler is found or the specified TDelegate type does not match.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type EventHandlerList. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).