如何：使用不同的隔离和安全性激活外接程序

可以使用不同的应用程序域和进程配置激活外接应用程序，以满足您的隔离和安全要求。 AddInToken 类的 Activate 方法重载为激活外接应用程序提供以下选择：

• 在其自己的由系统自动生成的应用程序域中。

• 在包含或不包含其他外接程序的现有应用程序域中。

• 在另一外接程序所处的环境（应用程序域和进程）中。

• 在一个新的、与宿主的进程不同的外部进程中。 该新进程可以包含共享该进程的其他外接程序。

当激活新应用程序域或进程中的外接程序时，必须使用 AddInSecurityLevel 或 PermissionSet 对象指定一个安全级别。 有关激活外接程序的更多信息，请参见外接程序的激活。

下面的过程演示如何使用 Activate 方法重载实现这些激活选项。 该示例假定已生成管线段和外接程序缓存，还假定已发现一个或多个外接程序并且这些外接程序在名为 tokens 的 AddInToken 集合中返回。 有关如何生成缓存文件和查找外接程序的更多信息，请参见外接程序的发现。

激活新应用程序域中的外接程序

• 使用 Activate<T>(AddInSecurityLevel) 或 Activate<T>(PermissionSet) 方法重载。

  'Ask the user which add-in they would like to use.
  Dim selectedToken As AddInToken = ChooseAddIn(tokens)
  'Activate the selected AddInToken in a new
  'application domain with the Internet trust level.
  Dim CalcAddIn As Calculator = selectedToken.Activate(Of Calculator)(AddInSecurityLevel.Internet)
  'Run the add-in using a custom method.
  RunCalculator(CalcAddIn)
  

  //Ask the user which add-in they would like to use.
  AddInToken selectedToken = ChooseAddIn(tokens);
  
  //Activate the selected AddInToken in a new
  //application domain with the Internet trust level.
  Calculator CalcAddIn = selectedToken.Activate<Calculator>(AddInSecurityLevel.Internet);
  
  //Run the add-in using a custom method.
  RunCalculator(CalcAddIn);
  

激活与其他外接程序位于同一应用程序域中的外接程序

• 使用 Activate<T>(AppDomain) 方法重载。

  ' Get the application domain
  ' of an existing add-in (CalcAddIn).
  
  Dim aiCtrl As AddInController = AddInController.GetAddInController(CalcAddIn)
  Dim AddInAppDom As AppDomain = aiCtrl.AppDomain
  
  ' Activate another add-in in the same appliation domain.
  Dim CalcAddIn3 As Calculator = selectedToken2.Activate(Of Calculator)(AddInAppDom)
  
  ' Show that the CalcAddIn3 was loaded
  ' into CalcCaddIn's application domain.
  Dim aic As AddInController = AddInController.GetAddInController(CalcAddIn3)
  Console.WriteLine("Add-in loaded into existing application domain: {0}", _
   aic.AppDomain.Equals(AddInAppDom))
  

  // Get the application domain
  // of an existing add-in (CalcAddIn).
  AddInController aiCtrl = AddInController.GetAddInController(CalcAddIn);
  AppDomain AddInAppDom = aiCtrl.AppDomain;
  
  // Activate another add-in in the same application domain.
  Calculator CalcAddIn3 =
      selectedToken2.Activate<Calculator>(AddInAppDom);
  
  // Show that CalcAddIn3 was loaded
  // into CalcAddIn's application domain.
  AddInController aic = AddInController.GetAddInController(CalcAddIn3);
  Console.WriteLine("Add-in loaded into existing application domain: {0}",
      aic.AppDomain.Equals(AddInAppDom));
  

激活与另一个外接程序位于同一应用程序域和进程中的外接程序

• 使用 Activate<T>(AddInEnvironment) 方法重载。

  ' Get the AddInController of a 
  ' currently activated add-in (CalcAddIn).
  Dim aiController As AddInController = AddInController.GetAddInController(CalcAddIn)
  
  ' Select another token.
  Dim selectedToken2 As AddInToken = ChooseAddIn(tokens)
  
  ' Activate a second add-in, CalcAddIn2, in the same
  ' appliation domain and process as the first add-in by passing
  ' the first add-in's AddInEnvironment object to the Activate method.
  
  Dim aiEnvironment As AddInEnvironment = aiController.AddInEnvironment
  Dim CalcAddIn2 As Calculator = _
      selectedToken2.Activate(Of Calculator)(aiEnvironment)
  
  ' Get the AddInController for the second add-in to compare environments.
  Dim aiController2 As AddInController = AddInController.GetAddInController(CalcAddIn2)
  
  Console.WriteLine("Add-ins in same application domain: {0}", _
      aiController.AppDomain.Equals(aiController2.AppDomain))
  Console.WriteLine("Add-ins in same process: {0}", _
      aiEnvironment.Process.Equals(aiController2.AddInEnvironment.Process))
  

  // Get the AddInController of a 
  // currently actived add-in (CalcAddIn).
  AddInController aiController = AddInController.GetAddInController(CalcAddIn);
  
  // Select another token.
  AddInToken selectedToken2 = ChooseAddIn(tokens);
  
  // Activate a second add-in, CalcAddIn2, in the same
  // appliation domain and process as the first add-in by passing
  // the first add-in's AddInEnvironment object to the Activate method.
  AddInEnvironment aiEnvironment = aiController.AddInEnvironment;
  Calculator CalcAddIn2 =
      selectedToken2.Activate<Calculator>(aiEnvironment);
  
  // Get the AddInController for the second add-in to compare environments.
  AddInController aiController2 = AddInController.GetAddInController(CalcAddIn2);
  Console.WriteLine("Add-ins in same application domain: {0}", aiController.AppDomain.Equals(aiController2.AppDomain));
  Console.WriteLine("Add-ins in same process: {0}", aiEnvironment.Process.Equals(aiController2.AddInEnvironment.Process));
  

激活新进程中的外接程序

• 使用 Activate<T>(AddInProcess, AddInSecurityLevel) 或 Activate<T>(AddInProcess, PermissionSet) 方法重载。

  ' Create an external process.
  Dim pExternal As New AddInProcess()
  
  ' Activate an add-in in the external process
  ' with a full trust security level.
  Dim CalcAddIn4 As Calculator = _
      selectedToken.Activate(Of Calculator)(pExternal, _
          AddInSecurityLevel.FullTrust)
  
  ' Show that the add-in is an an external process
  ' by verifying that it is not in the current (host's) process.
  Dim AddinCtl As AddInController = AddInController.GetAddInController(CalcAddIn4)
  Console.WriteLine("Add-in in host's process: {0}", _
   AddinCtl.AddInEnvironment.Process.IsCurrentProcess)
  

  // Create an external process.
  AddInProcess pExternal = new AddInProcess();
  
  // Activate an add-in in the external process
  // with a full trust security level.
  Calculator CalcAddIn4 =
      selectedToken.Activate<Calculator>(pExternal,
      AddInSecurityLevel.FullTrust);
  
  // Show that the add-in is an an external process
  // by verifying that it is not in the current (host's) process.
  AddInController AddinCtl = AddInController.GetAddInController(CalcAddIn4);
  Console.WriteLine("Add-in in host's process: {0}",
      AddinCtl.AddInEnvironment.Process.IsCurrentProcess);
  

请参见

概念

外接程序的发现

外接程序开发人员体验

其他资源

外接程序和扩展性