MergePullSubscription Class

Represents a pull subscription to a merge publication.

Namespace: Microsoft.SqlServer.Replication
Assembly: Microsoft.SqlServer.Rmo (in microsoft.sqlserver.rmo.dll)

Syntax

'Declaration
Public NotInheritable Class MergePullSubscription
    Inherits PullSubscription

public sealed class MergePullSubscription : PullSubscription

public ref class MergePullSubscription sealed : public PullSubscription

public final class MergePullSubscription extends PullSubscription

public final class MergePullSubscription extends PullSubscription

Remarks

For a pull subscription, the Merge Agent runs at the Subscriber.

This namespace, class, or member is supported only in version 2.0 of the Microsoft .NET Framework.

Inheritance Hierarchy

System.Object
   Microsoft.SqlServer.Replication.ReplicationObject
     Microsoft.SqlServer.Replication.PullSubscription
      Microsoft.SqlServer.Replication.MergePullSubscription

Example

// Define the Publisher, publication, and databases.
string publicationName = "AdvWorksSalesOrdersMerge";
string publisherName = publisherInstance;
string subscriberName = subscriberInstance;
string subscriptionDbName = "AdventureWorksReplica";
string publicationDbName = "AdventureWorks";
string hostname = @"adventure-works\garrett1";

//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();

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

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

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

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

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

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

        Boolean registered = false;

        // Verify that the subscription is not already registered.
        foreach (MergeSubscription existing
            in publication.EnumSubscriptions())
        {
            if (existing.SubscriberName == subscriberName
                && existing.SubscriptionDBName == subscriptionDbName
                && existing.SubscriptionType == SubscriptionOption.Pull)
            {
                registered = true;
            }
        }
        if (!registered)
        {
            // Register the local subscription with the Publisher.
            publication.MakePullSubscriptionWellKnown(
                subscriberName, subscriptionDbName,
                SubscriptionSyncType.Automatic,
                MergeSubscriberType.Local, 0);
        }
    }
    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 = "AdvWorksSalesOrdersMerge"
Dim publisherName As String = publisherInstance
Dim subscriberName As String = subscriberInstance
Dim subscriptionDbName As String = "AdventureWorksReplica"
Dim publicationDbName As String = "AdventureWorks"
Dim hostname As String = "adventure-works\garrett1"

'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()

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

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

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

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

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

        ' 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 MergeSubscription In _
        publication.EnumSubscriptions()
            If existing.SubscriberName = subscriberName Then
                registered = True
            End If
        Next
        If Not registered Then
            ' Register the local subscription with the Publisher.
            publication.MakePullSubscriptionWellKnown( _
             subscriberName, subscriptionDbName, _
             SubscriptionSyncType.Automatic, _
             MergeSubscriberType.Local, 0)
        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

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

See Also

Reference

MergePullSubscription Members
Microsoft.SqlServer.Replication Namespace

Other Resources

How to: Create a Pull Subscription (RMO Programming)
Sales Orders Sample for Merge Replication