TransSubscription Класс

Определение

public ref class TransSubscription sealed : Microsoft::SqlServer::Replication::Subscription

public sealed class TransSubscription : Microsoft.SqlServer.Replication.Subscription

type TransSubscription = class
    inherit Subscription

Public NotInheritable Class TransSubscription
Inherits Subscription

Наследование

Object

ReplicationObject

Subscription

TransSubscription

Примеры

           // Define the Publisher, publication, and databases.
           string publicationName = "AdvWorksProductTran";
           string publisherName = publisherInstance;
           string subscriberName = subscriberInstance;
           string subscriptionDbName = "AdventureWorks2012Replica";
           string publicationDbName = "AdventureWorks2012";

           //Create a connection to the Publisher.
           ServerConnection conn = new ServerConnection(publisherName);

           // Create the objects that we need.
           TransPublication publication;
           TransSubscription subscription;

           try
           {
               // Connect to the Publisher.
               conn.Connect();

               // Ensure that the publication exists and that 
               // it supports push subscriptions.
               publication = new TransPublication();
               publication.Name = publicationName;
               publication.DatabaseName = publicationDbName;
               publication.ConnectionContext = conn;

               if (publication.IsExistingObject)
               {
                   if ((publication.Attributes & PublicationAttributes.AllowPush) == 0)
                   {
                       publication.Attributes |= PublicationAttributes.AllowPush;
                   }

                   // Define the push subscription.
                   subscription = new TransSubscription();
                   subscription.ConnectionContext = conn;
                   subscription.SubscriberName = subscriberName;
                   subscription.PublicationName = publicationName;
                   subscription.DatabaseName = publicationDbName;
                   subscription.SubscriptionDBName = subscriptionDbName;

                   // Specify the Windows login credentials for the Distribution Agent job.
                   subscription.SynchronizationAgentProcessSecurity.Login = winLogin;
                   subscription.SynchronizationAgentProcessSecurity.Password = winPassword;

                   // By default, subscriptions to transactional publications are synchronized 
                   // continuously, but in this case we only want to synchronize on demand.
                   subscription.AgentSchedule.FrequencyType = ScheduleFrequencyType.OnDemand;

                   // Create the push subscription.
                   subscription.Create();
               }
               else
               {
                   // Do something here if the publication does not exist.
                   throw new ApplicationException(String.Format(
                       "The publication '{0}' does not exist on {1}.",
                       publicationName, publisherName));
               }
           }
           catch (Exception ex)
           {
               // Implement the appropriate error handling here.
               throw new ApplicationException(String.Format(
                   "The subscription to {0} could not be created.", publicationName), ex);
           }
           finally
           {
               conn.Disconnect();
           }

' Define the Publisher, publication, and databases.
Dim publicationName As String = "AdvWorksProductTran"
Dim publisherName As String = publisherInstance
Dim subscriberName As String = subscriberInstance
Dim subscriptionDbName As String = "AdventureWorks2012Replica"
Dim publicationDbName As String = "AdventureWorks2012"

'Create a connection to the Publisher.
Dim conn As ServerConnection = New ServerConnection(publisherName)

' Create the objects that we need.
Dim publication As TransPublication
Dim subscription As TransSubscription

Try
    ' Connect to the Publisher.
    conn.Connect()

    ' Ensure that the publication exists and that 
    ' it supports push subscriptions.
    publication = New TransPublication()
    publication.Name = publicationName
    publication.DatabaseName = publicationDbName
    publication.ConnectionContext = conn

    If publication.IsExistingObject Then
        If (publication.Attributes And PublicationAttributes.AllowPush) = 0 Then
            publication.Attributes = publication.Attributes _
            Or PublicationAttributes.AllowPush
        End If

        ' Define the push subscription.
        subscription = New TransSubscription()
        subscription.ConnectionContext = conn
        subscription.SubscriberName = subscriberName
        subscription.PublicationName = publicationName
        subscription.DatabaseName = publicationDbName
        subscription.SubscriptionDBName = subscriptionDbName

        ' Specify the Windows login credentials for the Distribution Agent job.
        subscription.SynchronizationAgentProcessSecurity.Login = winLogin
        subscription.SynchronizationAgentProcessSecurity.Password = winPassword

        ' By default, subscriptions to transactional publications are synchronized 
        ' continuously, but in this case we only want to synchronize on demand.
        subscription.AgentSchedule.FrequencyType = ScheduleFrequencyType.OnDemand

        ' Create the push subscription.
        subscription.Create()
    Else
        ' Do something here if the publication does not exist.
        Throw New ApplicationException(String.Format( _
         "The publication '{0}' does not exist on {1}.", _
         publicationName, publisherName))
    End If

Catch ex As Exception
    ' Implement the appropriate error handling here.
    Throw New ApplicationException(String.Format( _
        "The subscription to {0} could not be created.", publicationName), ex)
Finally
    conn.Disconnect()
End Try

Комментарии

При настройке Publisher с удалённым дистрибьютором значения, предоставленные для всех параметров, включая SynchronizationAgentProcessSecurity, передаются дистрибьютору в виде простого текста. Перед вызовом метода Create следует зашифровать подключение между издателем и его удаленным распространителем. Для получения дополнительной информации см. sp_reinitsubscription (Transact-SQL).

Когда подписка принадлежит не-SQL Server Publisher, свойство ConnectionContext устанавливается на дистрибьютора вместо Publisher, DatabaseName свойство — в базу данных распределения вместо базы публикаций, а свойство PublisherName — на имя не-SQL Server Publisher.

Потокобезопасность

Любые публичные статические (Sharedв Microsoft Visual Basic) члены этого типа безопасны для многопоточных операций. Никакие члены экземпляра не гарантированы как потокобезопасные.

См. также раздел

• Как сделать: Создать подписку Push (RMO Programming)