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DesignerEventHandler Delegate

Represents the method that will handle the DesignerCreated and DesignerDisposed events that are raised when a document is created or disposed of.

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

Public Delegate Sub DesignerEventHandler ( _
	sender As Object, _
	e As DesignerEventArgs _
Dim instance As New DesignerEventHandler(AddressOf HandlerMethod)
/** @delegate */
public delegate void DesignerEventHandler (
	Object sender, 
	DesignerEventArgs e
Not applicable.



The source of the event.


A DesignerEventArgs that contains the event data.

When you create a DesignerEventHandler 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 Events and Delegates.


The HostProtectionAttribute attribute applied to this class has the following Resources property value: SharedState. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

The following example demonstrates registering a DesignerEventHandler and handling the DesignerCreated and DesignerDisposed events.

Public Sub LinkDesignerEvent(ByVal eventService As IDesignerEventService)
    ' Registers an event handler for the DesignerCreated and DesignerDisposed events.
    AddHandler eventService.DesignerCreated, AddressOf Me.OnDesignerEvent
    AddHandler eventService.DesignerDisposed, AddressOf Me.OnDesignerEvent
End Sub

Private Sub OnDesignerEvent(ByVal sender As Object, ByVal e As DesignerEventArgs)
    ' Displays designer event information on the console.
    Console.WriteLine(("Name of the root component of the created or disposed designer: " + e.Designer.RootComponentClassName))
End Sub

public void LinkDesignerEvent(IDesignerEventService eventService)
    // Registers an event handler for the DesignerCreated and
    // DesignerDisposed events.
    eventService.add_DesignerCreated(new DesignerEventHandler(
    eventService.add_DesignerDisposed(new DesignerEventHandler(
} //LinkDesignerEvent

private void OnDesignerEvent(Object sender, DesignerEventArgs e)
    // Displays designer event information on the console.
    Console.WriteLine("Name of the root component of the created "
        + "or disposed designer: " + e.get_Designer().
} //OnDesignerEvent

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0