ISponsor 接口

指示该实施者希望成为生存期租约主办方。

**命名空间:**System.Runtime.Remoting.Lifetime
**程序集:**mscorlib（在 mscorlib.dll 中）

语法

声明
<ComVisibleAttribute(True)> _
Public Interface ISponsor
用法
Dim instance As ISponsor

[ComVisibleAttribute(true)] 
public interface ISponsor

[ComVisibleAttribute(true)] 
public interface class ISponsor

/** @attribute ComVisibleAttribute(true) */ 
public interface ISponsor

ComVisibleAttribute(true) 
public interface ISponsor

备注

如果对象需要为特定对象请求租约续订，则它必须实现 ISponsor 接口。实现 ISponsor 接口的对象可以通过将自身注册到租约管理器来成为主办方。ISponsor 接口由生存期服务用于回调到该主办方。

示例

Public Class MyClientSponsor
   Inherits MarshalByRefObject
   Implements ISponsor 
   Private lastRenewal As DateTime
   
   Public Sub New()
      lastRenewal = DateTime.Now
   End Sub 'New
   
   <SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _
   Public Function Renewal(lease As ILease) As TimeSpan Implements ISponsor.Renewal
      Console.WriteLine("Request to renew the lease time.")
      Console.WriteLine("Time since last renewal: " + _ 
                      DateTime.op_Subtraction(DateTime.Now, lastRenewal).ToString())
      
      lastRenewal = DateTime.Now
      Return TimeSpan.FromSeconds(20)
   End Function 'Renewal
End Class 'MyClientSponsor

public class MyClientSponsor : MarshalByRefObject, ISponsor
{
   private DateTime lastRenewal;
   public MyClientSponsor()
   {
      lastRenewal = DateTime.Now;
   }

   [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure)]
   public TimeSpan Renewal(ILease lease)
   {
      Console.WriteLine("Request to renew the lease time.");
      Console.WriteLine("Time since last renewal: " + 
         (DateTime.Now - lastRenewal).ToString());

      lastRenewal = DateTime.Now;
      return TimeSpan.FromSeconds(20);
   }
}

public ref class MyClientSponsor: public MarshalByRefObject, public ISponsor
{
private:
   DateTime lastRenewal;

public:
   MyClientSponsor()
   {
      lastRenewal = DateTime::Now;
   }

   [SecurityPermissionAttribute(SecurityAction::LinkDemand,Flags=SecurityPermissionFlag::Infrastructure)]
   virtual TimeSpan Renewal( ILease^ /* lease */ )
   {
      Console::WriteLine( "Request to renew the lease time." );
      Console::WriteLine( "Time since last renewal: {0}",
         DateTime::Now - lastRenewal );

      lastRenewal = DateTime::Now;
      return TimeSpan::FromSeconds( 20 );
   }
};

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

ISponsor 成员
System.Runtime.Remoting.Lifetime 命名空间