LicFileLicenseProvider 类
提供 LicenseProvider 的实现。提供程序与 Microsoft .NET Framework 标准授权模块的工作方式相似。
**命名空间:**System.ComponentModel
**程序集:**System(在 system.dll 中)
语法
声明
Public Class LicFileLicenseProvider
Inherits LicenseProvider
用法
Dim instance As LicFileLicenseProvider
public class LicFileLicenseProvider : LicenseProvider
public ref class LicFileLicenseProvider : public LicenseProvider
public class LicFileLicenseProvider extends LicenseProvider
public class LicFileLicenseProvider extends LicenseProvider
备注
LicFileLicenseProvider 提供 GetLicense 和 IsKeyValid 方法。IsKeyValid 方法确定 GetLicense 方法检索的 LicenseKey 是否有效。当从该类继承时,可以重写 IsKeyValid 方法以提供您自己的验证逻辑。
此类存在以提供与 COM 授权相似的授权功能并使用文本许可证文件。
有关授权的更多信息,请参见 如何:授予组件和控件许可权限。
示例
下面的示例使用 Validate 方法创建一个授权的控件。它使用许可证管理器的 LicFileLicenseProvider。
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 Not (license Is 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;
}
}
}
}
继承层次结构
System.Object
System.ComponentModel.LicenseProvider
System.ComponentModel.LicFileLicenseProvider
线程安全
此类型的任何公共静态(Visual Basic 中的 Shared)成员都是线程安全的,但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 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
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0
请参见
参考
LicFileLicenseProvider 成员
System.ComponentModel 命名空间
License 类
LicenseContext 类
LicenseException 类
LicenseManager 类
LicenseProvider 类
LicenseProviderAttribute 类
LicFileLicenseProvider 类
LicenseUsageMode 枚举