MarshalByRefObject.InitializeLifetimeService 方法

定義

命名空間:
System
組件:
mscorlib.dll, netstandard.dll, System.Runtime.dll

取得存留期服務物件，以控制這個執行個體的存留期原則。Obtains a lifetime service object to control the lifetime policy for this instance.

public:
 virtual System::Object ^ InitializeLifetimeService();
[System.Security.SecurityCritical]
public virtual object InitializeLifetimeService ();
abstract member InitializeLifetimeService : unit -> obj
override this.InitializeLifetimeService : unit -> obj
Public Overridable Function InitializeLifetimeService () As Object

傳回

Object

型別 ILease 的物件，用來控制這個執行個體的存留期原則。An object of type ILease used to control the lifetime policy for this instance. 如果存在目前存留期服務物件，則這是這個執行個體的目前存留期服務物件，否則為新的存留期服務物件，其初始化為 LeaseManagerPollTime 屬性 (Property) 的值。This is the current lifetime service object for this instance if one exists; otherwise, a new lifetime service object initialized to the value of the LeaseManagerPollTime property.

屬性
SecurityCriticalAttribute

例外狀況

SecurityException

立即呼叫端沒有基礎結構使用權限。The immediate caller does not have infrastructure permission.

範例

下列程式碼範例示範如何建立租用。The following code example demonstrates creating a lease.

public ref class MyClass: public MarshalByRefObject
{
public:
   
   [System::Security::Permissions::SecurityPermissionAttribute
   (System::Security::Permissions::SecurityAction::Demand,
   Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
   virtual Object^ InitializeLifetimeService() override
   {
      ILease^ lease = dynamic_cast<ILease^>(MarshalByRefObject::InitializeLifetimeService());
      if ( lease->CurrentState == LeaseState::Initial )
      {
         lease->InitialLeaseTime = TimeSpan::FromMinutes( 1 );
         lease->SponsorshipTimeout = TimeSpan::FromMinutes( 2 );
         lease->RenewOnCallTime = TimeSpan::FromSeconds( 2 );
      }

      return lease;
   }

};


public class MyClass : MarshalByRefObject
{
  [SecurityPermissionAttribute(SecurityAction.Demand, 
                               Flags=SecurityPermissionFlag.Infrastructure)]
  public override Object InitializeLifetimeService()
  {
    ILease lease = (ILease)base.InitializeLifetimeService();
    if (lease.CurrentState == LeaseState.Initial)
    {
         lease.InitialLeaseTime = TimeSpan.FromMinutes(1);
         lease.SponsorshipTimeout = TimeSpan.FromMinutes(2);
          lease.RenewOnCallTime = TimeSpan.FromSeconds(2);
    }
      return lease;
  }
}

Public Class LSClass
    Inherits MarshalByRefObject
    
    <SecurityPermissionAttribute(SecurityAction.Demand, _
                                 Flags:=SecurityPermissionFlag.Infrastructure)> _
    Public Overrides Function InitializeLifetimeService() As Object
        Dim lease As ILease = CType(MyBase.InitializeLifetimeService(), ILease)
        If lease.CurrentState = LeaseState.Initial Then
            lease.InitialLeaseTime = TimeSpan.FromMinutes(1)
            lease.SponsorshipTimeout = TimeSpan.FromMinutes(2)
            lease.RenewOnCallTime = TimeSpan.FromSeconds(2)
        End If
        Return lease
    End Function


    Public Shared Sub Main()  
    ' The main thread processing is here.
    End Sub
End Class

備註

如需生命週期服務的詳細資訊， LifetimeServices請參閱類別。For more information about lifetime services, see the LifetimeServices class.

安全性

SecurityCriticalAttribute
需要完全信任立即呼叫者。requires full trust for the immediate caller. 部分信任或透明的程式碼無法使用這個成員。This member cannot be used by partially trusted or transparent code.

適用於