LicenseManager Class

Provides properties and methods to add a license to a component and to manage a LicenseProvider. This class cannot be inherited.

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

'Declaration
Public NotInheritable Class LicenseManager
'Usage
Dim instance As LicenseManager

public final class LicenseManager
public final class LicenseManager
Not applicable.

The LicenseManager class provides the following static properties: CurrentContext and UsageMode. The class also provides the following static methods: CreateWithContext, IsValid, and Validate.

When you create a component that you want to license, you must do the following:

  1. Specify the LicenseProvider by marking the component with a LicenseProviderAttribute.

  2. Call Validate or IsValid in the constructor of the component. Validate throws a LicenseException when it tries to create an instance without a valid license. IsValid does not throw an exception.

  3. Call Dispose on any license that is granted when the component is disposed or finalized.

For more information on licensing, see How to: License Components and Controls.

NoteNote:

The HostProtectionAttribute attribute applied to this class has the following Resources property value: ExternalProcessMgmt. 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 code example creates a licensed control using the Validate method. It uses a LicenseProvider that is implemented by the LicFileLicenseProvider class.

Imports System
Imports System.ComponentModel
Imports System.Windows.Forms

' Adds the LicenseProviderAttribute to the control.
<LicenseProvider(GetType(LicFileLicenseProvider))> _
Public Class MyControl
    Inherits Control
    
    ' Creates a new, null license.
    Private license As License = Nothing    
    
    Public Sub New()        
    
        ' Adds Validate to the control's constructor.
        license = LicenseManager.Validate(GetType(MyControl), Me)

        ' Insert code to perform other instance creation tasks here.
        
    End Sub
    
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)

        If disposing Then
            If (license IsNot Nothing) Then
                license.Dispose()
                license = Nothing
            End If
        End If

    End Sub    
    
End Class


import System.*;
import System.ComponentModel.*;
import System.Windows.Forms.*;


// Adds the LicenseProviderAttribute to the control.
/** @attribute LicenseProvider(LicFileLicenseProvider.class)
 */
public class MyControl extends Control
{
    // Creates a new, null license.
    private License license = null;

    public MyControl()
    {
        // Adds Validate to the control's constructor.
        license = LicenseManager.Validate(MyControl.class.ToType(), this);

        // Insert code to perform other instance creation tasks here.
    } 
    
    protected void Dispose(boolean disposing)
    {
        if (disposing) {
            if (license != null) {
                license.Dispose();
                license = null;
            }
        }
    } 
} 

System.Object
  System.ComponentModel.LicenseManager

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

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

Community Additions

ADD
Show: