You can use the SQL Server 2000 Replication ActiveX controls to embed replication functionality inside custom applications. This article demonstrates how to program the SQL Merge control with Microsoft Visual Basic .NET.
Before you insert the sample code in a Visual Basic .NET project, follow these steps:
- Make sure to properly configure the publisher, the distributor, and the subscriber, and make sure that they are all on SQL Server 2000.
- Create a merge publication that is called "SampleMergePublication". The publishing database is Northwind.
The following sample code generates a snapshot by using the SQL Merge control. The sample code will create the Northwind_replica subscription database. Make sure the Northwind_replica database does not already exist before you execute the sample code. Finally, the sample code creates a pull subscription in the Northwind_replica database, and then it applies the snapshot at the subscriber.
Inside the Visual Basic .NET project, add references to the Microsoft SQL Merge Control 8.0 COM object, and then add the following code:
'This class demonstrates using the SQL Server Merge Agent replication control.
' Prior to running this code, replication needs to be setup as follows:
' Create a merge publication called "SampleMergePublication" and configure it to allow pull
' This code will first generate the snapshot. Then the subscription database
' and pull subscription will be created through code. Then the snapshot will be applied at the subscriber using
' the SQLMergeClass object.
' You will also need to set a reference to the following COM dll:
' -Microsoft SQL Merge Control 8.0
Dim strPublisher As String
Dim strDistributor As String
Dim strSubscriber As String
Dim strPublisherDatabase As String
Dim strSubscriberDatabase As String
Dim strPublication As String
Dim oMerge As SQLMergeClass
strPublisher = "PUBLISHER" 'change to the name of your publisher
strDistributor = "DISTRIBUTOR" 'change to the name of your distributor
strSubscriber = "SUBSCRIBER" 'change to the name of your subscriber
strPublication = "SampleMergePublication"
strPublisherDatabase = "Northwind"
strSubscriberDatabase = "Northwind_replica"
oMerge = New SQLMergeClass()
'Set up the Publisher.
oMerge.Publisher = strPublisher
oMerge.PublisherSecurityMode = SQLMERGXLib.SECURITY_TYPE.NT_AUTHENTICATION
oMerge.PublisherDatabase = strPublisherDatabase
oMerge.Publication = strPublication
'Set up the Distributor.
oMerge.Distributor = strDistributor
oMerge.DistributorSecurityMode = SQLMERGXLib.SECURITY_TYPE.NT_AUTHENTICATION
'Set up the Subscriber.
oMerge.Subscriber = strSubscriber
oMerge.SubscriberDatabase = strSubscriberDatabase
oMerge.SubscriberSecurityMode = SQLMERGXLib.SECURITY_TYPE.NT_AUTHENTICATION
'Set up the subscription.
oMerge.SubscriptionType = SQLMERGXLib.SUBSCRIPTION_TYPE.PULL
oMerge.SynchronizationType = SQLMERGXLib.SYNCHRONIZATION_TYPE.AUTOMATIC
oMerge.SubscriptionName = "PullMergeSubscription"
'Create the database and subscription.
'Synchronize the subscription.
For a Microsoft Visual C# .NET version of this article, see 319646
For samples that are written in earlier versions of Microsoft Visual Basic and Microsoft Visual C++, refer to the following SQL Server Books Online topics:
Article ID: 319647 - Last Review: December 26, 2003 - Revision: 3.6
- Microsoft SQL Server 2000 Standard Edition
- Microsoft SQL Server 2000 64-bit Edition
- Microsoft Visual Basic .NET 2002 Standard Edition
- Microsoft Visual Basic .NET 2003 Standard Edition