ActiveDesignerEventArgs Class

Provides data for the ActiveDesigner event.

System.Object
  System.EventArgs
    System.ComponentModel.Design.ActiveDesignerEventArgs

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

'Declaration
<PermissionSetAttribute(SecurityAction.InheritanceDemand, Name := "FullTrust")> _
<PermissionSetAttribute(SecurityAction.LinkDemand, Name := "FullTrust")> _
<HostProtectionAttribute(SecurityAction.LinkDemand, SharedState := True)> _
Public Class ActiveDesignerEventArgs _
	Inherits EventArgs

The ActiveDesignerEventArgs type exposes the following members.

  NameDescription
Public methodActiveDesignerEventArgsInitializes a new instance of the ActiveDesignerEventArgs class.
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  NameDescription
Public propertyNewDesignerGets the document that is gaining activation.
Public propertyOldDesignerGets the document that is losing activation.
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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The ActiveDesigner event occurs when the currently active document changes. The active document changes when a new document is created, an existing document is opened, or a document is closed.

When you create an ActiveDesignerEventArgs 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.

NoteNote

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.

The following example method returns an ActiveDesignerEventArgs that contains a specified reference to the IDesignerHost for the designer losing focus and a specified reference to the IDesignerHost for the designer gaining focus.

Public Function CreateActiveDesignerEventArgs(ByVal losingFocus As IDesignerHost, ByVal gainingFocus As IDesignerHost) As ActiveDesignerEventArgs
    Dim e As New ActiveDesignerEventArgs(losingFocus, gainingFocus)
    Return e
End Function

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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