Конструктор TransPullSubscription

Creates a new instance of the TransPullSubscription class.

Пространство имен:  Microsoft.SqlServer.Replication
Сборка:  Microsoft.SqlServer.Rmo (в Microsoft.SqlServer.Rmo.dll)

Синтаксис

'Декларация
Public Sub New
'Применение
Dim instance As New TransPullSubscription()

public TransPullSubscription()

public:
TransPullSubscription()

new : unit -> TransPullSubscription

public function TransPullSubscription()

Замечания

The default constructor initializes any fields to their default values.

Примеры

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

            //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 Publisher and Subscriber.
                subscriberConn.Connect();
                publisherConn.Connect();

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

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

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

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

                    // Make sure that the agent job for the subscription is created.
                    subscription.CreateSyncAgentByDefault = true;

                    // 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 pull subscription at the Subscriber.
                    subscription.Create();

                    Boolean registered = false;

                    // Verify that the subscription is not already registered.
                    foreach (TransSubscription existing
                        in publication.EnumSubscriptions())
                    {
                        if (existing.SubscriberName == subscriberName
                            && existing.SubscriptionDBName == subscriptionDbName)
                        {
                            registered = true;
                        }
                    }
                    if (!registered)
                    {
                        // Register the subscription with the Publisher.
                        publication.MakePullSubscriptionWellKnown(
                            subscriberName, subscriptionDbName,
                            SubscriptionSyncType.Automatic,
                            TransSubscriberType.ReadOnly);
                    }
                }
                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
            {
                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 = "AdventureWorks2012Replica"
Dim publicationDbName As String = "AdventureWorks2012"

'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 Publisher and Subscriber.
    subscriberConn.Connect()
    publisherConn.Connect()

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

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

        ' Define the pull subscription.
        subscription = New TransPullSubscription()
        subscription.ConnectionContext = subscriberConn
        subscription.PublisherName = publisherName
        subscription.PublicationName = publicationName
        subscription.PublicationDBName = publicationDbName
        subscription.DatabaseName = subscriptionDbName
        subscription.Description = "Pull subscription to " + publicationDbName _
        + " on " + subscriberName + "."

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

        ' Make sure that the agent job for the subscription is created.
        subscription.CreateSyncAgentByDefault = True

        ' 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 pull subscription at the Subscriber.
        subscription.Create()

        Dim registered As Boolean = False

        ' Verify that the subscription is not already registered.
        For Each existing As TransSubscription In publication.EnumSubscriptions()
            If existing.SubscriberName = subscriberName And _
                existing.SubscriptionDBName = subscriptionDbName Then
                registered = True
            End If
        Next existing
        If Not registered Then
            ' Register the subscription with the Publisher.
            publication.MakePullSubscriptionWellKnown( _
             subscriberName, subscriptionDbName, _
             SubscriptionSyncType.Automatic, _
             TransSubscriberType.ReadOnly)
        End If
    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
    subscriberConn.Disconnect()
    publisherConn.Disconnect()
End Try

См. также

Справочник

TransPullSubscription Класс

Перегрузка TransPullSubscription

Пространство имен Microsoft.SqlServer.Replication