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ActiveDesignerEventArgs Class

.NET Framework 4

Provides data for the ActiveDesigner event.

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

Namespace:  System.ComponentModel.Design
Assembly:  System (in System.dll)
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[PermissionSetAttribute(SecurityAction.InheritanceDemand, Name = "FullTrust")]
[PermissionSetAttribute(SecurityAction.LinkDemand, Name = "FullTrust")]
[HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)]
public class ActiveDesignerEventArgs : EventArgs

The ActiveDesignerEventArgs type exposes the following members.

  Name Description
Public method ActiveDesignerEventArgs Initializes a new instance of the ActiveDesignerEventArgs class.
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  Name Description
Public property NewDesigner Gets the document that is gaining activation.
Public property OldDesigner Gets the document that is losing activation.
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  Name Description
Public method Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Returns 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.

Note Note

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.

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        public ActiveDesignerEventArgs CreateActiveDesignerEventArgs(IDesignerHost losingFocus, IDesignerHost gainingFocus)
        {
            ActiveDesignerEventArgs e = new ActiveDesignerEventArgs(losingFocus, gainingFocus);
	        return e;
        }

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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