Provides an implementation of a
LicenseProvider. The provider works in a similar fashion to the Microsoft .NET Framework standard licensing model.
Namespace: System.ComponentModel
Assembly: System (in system.dll)
Visual Basic (Declaration)
Public Class LicFileLicenseProvider
Inherits LicenseProvider
Dim instance As LicFileLicenseProvider
public class LicFileLicenseProvider : LicenseProvider
public ref class LicFileLicenseProvider : public LicenseProvider
public class LicFileLicenseProvider extends LicenseProvider
public class LicFileLicenseProvider extends LicenseProvider
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
using System;
using System.ComponentModel;
using System.Windows.Forms;
// Adds the LicenseProviderAttribute to the control.
[LicenseProvider(typeof(LicFileLicenseProvider))]
public class MyControl : Control
{
// Creates a new, null license.
private License license = null;
public MyControl ()
{
// Adds Validate to the control's constructor.
license = LicenseManager.Validate(typeof(MyControl), this);
// Insert code to perform other instance creation tasks here.
}
protected override void Dispose(bool disposing)
{
if(disposing)
{
if (license != null)
{
license.Dispose();
license = null;
}
}
}
}
// Adds the LicenseProviderAttribute to the control.
[LicenseProvider(LicFileLicenseProvider::typeid)]
public ref class MyControl: public Control
{
// Creates a new, null license.
private:
License^ license;
public:
MyControl()
{
// Adds Validate to the control's constructor.
license = LicenseManager::Validate( MyControl::typeid, this );
// Insert code to perform other instance creation tasks here.
}
public:
~MyControl()
{
if ( license != nullptr )
{
delete license;
license = nullptr;
}
}
};
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.LicenseProvider
System.ComponentModel.LicFileLicenseProvider
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