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IExtenderProviderService Interface
Visual Studio 2008
Provides an interface for adding and removing extender providers at design time.
Assembly: System (in System.dll)
The following example demosntrates using the IExtenderProviderService from a designer to add and remove an IExtenderProvider implementation.
Imports System Imports System.Collections Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.Windows.Forms Imports System.Windows.Forms.Design ' This designer adds a ComponentExtender extender provider, ' and removes it when the designer is destroyed. Public Class ExtenderServiceDesigner Inherits System.Windows.Forms.Design.ControlDesigner ' A local reference to an obtained IExtenderProviderService. Private localExtenderServiceReference As IExtenderProviderService ' An IExtenderProvider that this designer supplies. Private extender As ComponentExtender Public Sub New() End Sub Public Overrides Sub Initialize(ByVal component As System.ComponentModel.IComponent) MyBase.Initialize(component) ' Attempts to obtain an IExtenderProviderService. Dim extenderService As IExtenderProviderService = CType(component.Site.GetService(GetType(IExtenderProviderService)), IExtenderProviderService) If (extenderService IsNot Nothing) Then ' If the service was obtained, adds a ComponentExtender ' that adds an "ExtenderIndex" integer property to the ' designer's component. extender = New ComponentExtender() extenderService.AddExtenderProvider(extender) localExtenderServiceReference = extenderService Else MessageBox.Show("Could not obtain an IExtenderProviderService.") End If End Sub Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) ' Removes any previously added extender provider. If (localExtenderServiceReference IsNot Nothing) Then localExtenderServiceReference.RemoveExtenderProvider(extender) localExtenderServiceReference = Nothing End If End Sub End Class ' IExtenderProviderImplementation that adds an integer property ' named "ExtenderIndex" to any design-mode document object. <ProvidePropertyAttribute("ExtenderIndex", GetType(IComponent))> _ Public Class ComponentExtender Implements System.ComponentModel.IExtenderProvider ' Stores the value of the property to extend a component with. Public index As Integer = 0 Public Sub New() End Sub ' Extends any type of object. Public Function CanExtend(ByVal extendee As Object) As Boolean Implements IExtenderProvider.CanExtend Return True End Function Public Function GetExtenderIndex(ByVal component As IComponent) As Integer Return index End Function Public Sub SetExtenderIndex(ByVal component As IComponent, ByVal index As Integer) Me.index = index End Sub End Class ' Example UserControl associated with the ExtenderServiceDesigner. <DesignerAttribute(GetType(ExtenderServiceDesigner))> _ Public Class ExtenderServiceTestControl Inherits System.Windows.Forms.UserControl Public Sub New() End Sub End Class
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.
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