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Как удалить подписку по запросу (программирование объектов RMO)

Подписки по запросу можно удалять программно с помощью объектов RMO. Конкретные классы объектов RMO, используемые для удаления подписки по запросу, зависят от типа публикации, которой принадлежит эта подписка по запросу.

Удаление подписки по запросу на публикацию моментальных снимков или транзакций

  1. Создайте соединения с подписчиком и издателем с помощью класса ServerConnection.

  2. Создайте экземпляр класса TransPullSubscription и задайте свойства PublicationName, DatabaseName, PublisherName и PublicationDBName. Чтобы установить свойство ConnectionContext, используется соединение подписчика из шага 1.

  3. Проверьте свойство IsExistingObject, чтобы убедиться, что подписка существует. Если это свойство имеет значение false, значит, на шаге 2 были неправильно заданы свойства подписки либо подписка не существует.

  4. Вызовите метод Remove.

  5. Создайте экземпляр класса TransPublication, используя соединение с издателем, созданное на шаге 1. Укажите значения свойств Name, DatabaseName и ConnectionContext.

  6. Вызовите метод LoadProperties. Если метод возвращает значение false, то либо неверно определены свойства, указанные на шаге 5, либо публикация не существует на сервере.

  7. Вызовите метод RemovePullSubscription. Укажите имя подписчика и имя базы данных подписки в параметрах subscriber и subscriberDB.

Удаление подписки по запросу на публикацию слиянием

  1. Создайте соединения с подписчиком и издателем с помощью класса ServerConnection.

  2. Создайте экземпляр класса MergePullSubscription и задайте свойства PublicationName, DatabaseName, PublisherName и PublicationDBName. Чтобы установить свойство ConnectionContext, используется соединение из шага 1.

  3. Проверьте свойство IsExistingObject, чтобы убедиться, что подписка существует. Если это свойство имеет значение false, значит, на шаге 2 были неправильно заданы свойства подписки либо подписка не существует.

  4. Вызовите метод Remove.

  5. Создайте экземпляр класса MergePublication, используя соединение с издателем, созданное на шаге 1. Укажите значения свойств Name, DatabaseName и ConnectionContext.

  6. Вызовите метод LoadProperties. Если метод возвращает значение false, то либо неверно определены свойства, указанные на шаге 5, либо публикация не существует на сервере.

  7. Вызовите метод RemovePullSubscription. Укажите имя подписчика и имя базы данных подписки в параметрах subscriber и subscriberDB.

Пример

В этом примере удаляется подписка по запросу на публикацию транзакций, а также удаляется регистрация подписки на издателе.

          // Define the Publisher, publication, and databases.
            string publicationName = "AdvWorksProductTran";
            string publisherName = publisherInstance;
            string subscriberName = subscriberInstance;
            string subscriptionDbName = "AdventureWorks2008R2Replica";
            string publicationDbName = "AdventureWorks2008R2";

            //Create connections to the Publisher and Subscriber.
            ServerConnection subscriberConn = new ServerConnection(subscriberName);
            ServerConnection publisherConn = new ServerConnection(publisherName);

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

            try
            {
                // Connect to the Subscriber.
                subscriberConn.Connect();

                // Define the pull subscription.
                subscription = new TransPullSubscription();
                subscription.ConnectionContext = subscriberConn;
                subscription.PublisherName = publisherName;
                subscription.PublicationName = publicationName;
                subscription.PublicationDBName = publicationDbName;
                subscription.DatabaseName = subscriptionDbName;

                // Define the publication.
                publication = new TransPublication();
                publication.Name = publicationName;
                publication.DatabaseName = publicationDbName;
                publication.ConnectionContext = publisherConn;

                // Delete the pull subscription, if it exists.
                if (subscription.IsExistingObject)
                {
                    if (publication.LoadProperties())
                    {
                        // Remove the pull subscription registration at the Publisher.
                        publication.RemovePullSubscription(subscriberName, subscriptionDbName);
                    }
                    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));
                    }
                    // Delete the pull subscription at the Subscriber.
                    subscription.Remove();
                }
                else
                {
                    throw new ApplicationException(String.Format(
                        "The subscription to {0} does not exist on {1}",
                        publicationName, subscriberName));
                }
            }
            catch (Exception ex)
            {
                // Implement the appropriate error handling here.
                throw new ApplicationException(String.Format(
                    "The subscription to {0} could not be deleted.", publicationName), ex);
            }
            finally
            {
                subscriberConn.Disconnect();
                publisherConn.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 = "AdventureWorks2008R2Replica"
Dim publicationDbName As String = "AdventureWorks2008R2"

'Create connections to the Publisher and Subscriber.
Dim subscriberConn As ServerConnection = New ServerConnection(subscriberName)
Dim publisherConn As ServerConnection = New ServerConnection(publisherName)

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

Try
    ' Connect to the Subscriber.
    subscriberConn.Connect()

    ' Define the pull subscription.
    subscription = New TransPullSubscription()
    subscription.ConnectionContext = subscriberConn
    subscription.PublisherName = publisherName
    subscription.PublicationName = publicationName
    subscription.PublicationDBName = publicationDbName
    subscription.DatabaseName = subscriptionDbName

    ' Define the publication.
    publication = New TransPublication()
    publication.Name = publicationName
    publication.DatabaseName = publicationDbName
    publication.ConnectionContext = publisherConn

    ' Delete the pull subscription, if it exists.
    If subscription.IsExistingObject Then

        If publication.LoadProperties() Then
            ' Remove the pull subscription registration at the Publisher.
            publication.RemovePullSubscription(subscriberName, subscriptionDbName)
        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
        ' Delete the pull subscription at the Subscriber.
        subscription.Remove()
    Else
        Throw New ApplicationException(String.Format( _
         "The subscription to {0} does not exist on {1}", _
         publicationName, subscriberName))
    End If
Catch ex As Exception
    ' Implement the appropriate error handling here.
    Throw New ApplicationException(String.Format( _
        "The subscription to {0} could not be deleted.", publicationName), ex)
Finally
    subscriberConn.Disconnect()
    publisherConn.Disconnect()
End Try

В этом примере удаляется подписка по запросу на публикацию слиянием, а также удаляется регистрация подписки на издателе.

            // Define the Publisher, publication, and databases.
            string publicationName = "AdvWorksSalesOrdersMerge";
            string publisherName = publisherInstance;
            string subscriberName = subscriberInstance;
            string subscriptionDbName = "AdventureWorks2008R2Replica";
            string publicationDbName = "AdventureWorks2008R2";

            //Create connections to the Publisher and Subscriber.
            ServerConnection subscriberConn = new ServerConnection(subscriberName);
            ServerConnection publisherConn = new ServerConnection(publisherName);

            // Create the objects that we need.
            MergePublication publication;
            MergePullSubscription subscription;

            try
            {
                // Connect to the Subscriber.
                subscriberConn.Connect();

                // Define the pull subscription.
                subscription = new MergePullSubscription();
                subscription.ConnectionContext = subscriberConn;
                subscription.PublisherName = publisherName;
                subscription.PublicationName = publicationName;
                subscription.PublicationDBName = publicationDbName;
                subscription.DatabaseName = subscriptionDbName;

                // Define the publication.
                publication = new MergePublication();
                publication.Name = publicationName;
                publication.DatabaseName = publicationDbName;
                publication.ConnectionContext = publisherConn;

                // Delete the pull subscription, if it exists.
                if (subscription.IsExistingObject)
                {
                    // Delete the pull subscription at the Subscriber.
                    subscription.Remove();

                    if (publication.LoadProperties())
                    {
                        publication.RemovePullSubscription(subscriberName, subscriptionDbName);
                    }
                    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));
                    }
                }
                else
                {
                    throw new ApplicationException(String.Format(
                        "The subscription to {0} does not exist on {1}",
                        publicationName, subscriberName));
                }
            }
            catch (Exception ex)
            {
                // Implement the appropriate error handling here.
                throw new ApplicationException(String.Format(
                    "The subscription to {0} could not be deleted.", publicationName), ex);
            }
            finally
            {
                subscriberConn.Disconnect();
                publisherConn.Disconnect();
            }
' Define the Publisher, publication, and databases.
Dim publicationName As String = "AdvWorksSalesOrdersMerge"
Dim publisherName As String = publisherInstance
Dim subscriberName As String = subscriberInstance
Dim subscriptionDbName As String = "AdventureWorks2008R2Replica"
Dim publicationDbName As String = "AdventureWorks2008R2"

'Create connections to the Publisher and Subscriber.
Dim subscriberConn As ServerConnection = New ServerConnection(subscriberName)
Dim publisherConn As ServerConnection = New ServerConnection(publisherName)

' Create the objects that we need.
Dim publication As MergePublication
Dim subscription As MergePullSubscription

Try
    ' Connect to the Subscriber.
    subscriberConn.Connect()

    ' Define the pull subscription.
    subscription = New MergePullSubscription()
    subscription.ConnectionContext = subscriberConn
    subscription.PublisherName = publisherName
    subscription.PublicationName = publicationName
    subscription.PublicationDBName = publicationDbName
    subscription.DatabaseName = subscriptionDbName

    ' Define the publication.
    publication = New MergePublication()
    publication.Name = publicationName
    publication.DatabaseName = publicationDbName
    publication.ConnectionContext = publisherConn

    ' Delete the pull subscription, if it exists.
    If subscription.IsExistingObject Then

        ' Delete the pull subscription at the Subscriber.
        subscription.Remove()

        If publication.LoadProperties() Then
            publication.RemovePullSubscription(subscriberName, subscriptionDbName)
        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
    Else
        Throw New ApplicationException(String.Format( _
         "The subscription to {0} does not exist on {1}", _
         publicationName, subscriberName))
    End If
Catch ex As Exception
    ' Implement the appropriate error handling here.
    Throw New ApplicationException(String.Format( _
        "The subscription to {0} could not be deleted.", publicationName), ex)
Finally
    subscriberConn.Disconnect()
    publisherConn.Disconnect()
End Try