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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)

<HostProtectionAttribute(SecurityAction.LinkDemand, SharedState := True)> _
Public Delegate Sub DesignerEventHandler ( _
	sender As Object, _
	e As DesignerEventArgs _
Dim instance As New DesignerEventHandler(AddressOf HandlerMethod)


Type: System.Object

The source of the event.

Type: System.ComponentModel.Design.DesignerEventArgs

A DesignerEventArgs that contains the event data.


The HostProtectionAttribute attribute applied to this type or member 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.

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 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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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