LicFileLicenseProvider Class
Assembly: System (in system.dll)
The LicFileLicenseProvider offers GetLicense and IsKeyValid methods. The IsKeyValid method determines whether the LicenseKey retrieved by the GetLicense method is valid. When you inherit from this class, you can override the IsKeyValid method to provide your own validation logic.
This class exists to provide similar licensing functionality to COM licensing and uses text license files.
For more information on licensing, see How to: License Components and Controls.
The following example creates a licensed control using the Validate method. It uses LicFileLicenseProvider for the license manager.
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;
}
}
}
}
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.