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MergeArticle Class

Represents an article in a merge publication.

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

public sealed class MergeArticle : Article

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

Thread Safety

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

This example creates three merge articles and their related join filters.

			// Define the Publisher and publication names.
			string publisherName = publisherInstance;
			string publicationName = "AdvWorksSalesOrdersMerge";
			string publicationDbName = "AdventureWorks";

			// Specify article names.
			string articleName1 = "Employee";
			string articleName2 = "SalesOrderHeader";
			string articleName3 = "SalesOrderDetail";

			// Specify join filter information.
			string filterName12 = "SalesOrderHeader_Employee";
			string filterClause12 = "Employee.EmployeeID = " +
				"SalesOrderHeader.SalesPersonID";
			string filterName23 = "SalesOrderDetail_SalesOrderHeader";
			string filterClause23 = "SalesOrderHeader.SalesOrderID = " +
				"SalesOrderDetail.SalesOrderID";

			string salesSchema = "Sales";
			string hrSchema = "HumanResources";

			MergeArticle article1 = new MergeArticle();
			MergeArticle article2 = new MergeArticle();
			MergeArticle article3 = new MergeArticle();
			MergeJoinFilter filter12 = new MergeJoinFilter();
			MergeJoinFilter filter23 = new MergeJoinFilter();

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

			// Create three merge articles that are horizontally partitioned
			// using a parameterized row filter on Employee.EmployeeID, which is 
			// extended to the two other articles using join filters. 
			try
			{
				// Connect to the Publisher.
				conn.Connect();

				// Create each article. 
				// For clarity, each article is defined separately. 
				// In practice, iterative structures and arrays should 
				// be used to efficiently create multiple articles.

				// Set the required properties for the Employee article.
				article1.ConnectionContext = conn;
				article1.Name = articleName1;
				article1.DatabaseName = publicationDbName;
				article1.SourceObjectName = articleName1;
				article1.SourceObjectOwner = hrSchema;
				article1.PublicationName = publicationName;
				article1.Type = ArticleOptions.TableBased;

				// Define the parameterized filter clause based on Hostname.
				article1.FilterClause = "Employee.LoginID = HOST_NAME()";

				// Set the required properties for the SalesOrderHeader article.
				article2.ConnectionContext = conn;
				article2.Name = articleName2;
				article2.DatabaseName = publicationDbName;
				article2.SourceObjectName = articleName2;
				article2.SourceObjectOwner = salesSchema;
				article2.PublicationName = publicationName;
				article2.Type = ArticleOptions.TableBased;

				// Set the required properties for the SalesOrderDetail article.
				article3.ConnectionContext = conn;
				article3.Name = articleName3;
				article3.DatabaseName = publicationDbName;
				article3.SourceObjectName = articleName3;
				article3.SourceObjectOwner = salesSchema;
				article3.PublicationName = publicationName;
				article3.Type = ArticleOptions.TableBased;

				if (!article1.IsExistingObject) article1.Create();
				if (!article2.IsExistingObject) article2.Create();
				if (!article3.IsExistingObject) article3.Create();

				// Select published columns for SalesOrderHeader.
				// Create an array of column names to vertically filter out.
				// In this example, only one column is removed.
				String[] columns = new String[1];

				columns[0] = "CreditCardApprovalCode";

				// Remove the column.
				article2.RemoveReplicatedColumns(columns);

				// Define a merge filter clauses that filter 
				// SalesOrderHeader based on Employee and 
				// SalesOrderDetail based on SalesOrderHeader. 

				// Parent article.
				filter12.JoinArticleName = articleName1;
				// Child article.
				filter12.ArticleName = articleName2;
				filter12.FilterName = filterName12;
				filter12.JoinUniqueKey = true;
				filter12.FilterTypes = FilterTypes.JoinFilter;
				filter12.JoinFilterClause = filterClause12;

				// Add the join filter to the child article.
				article2.AddMergeJoinFilter(filter12);

				// Parent article.
				filter23.JoinArticleName = articleName2;
				// Child article.
				filter23.ArticleName = articleName3;
				filter23.FilterName = filterName23;
				filter23.JoinUniqueKey = true;
				filter23.FilterTypes = FilterTypes.JoinFilter;
				filter23.JoinFilterClause = filterClause23;

				// Add the join filter to the child article.
				article3.AddMergeJoinFilter(filter23);
			}
			catch (Exception ex)
			{
				// Do error handling here and rollback the transaction.
				throw new ApplicationException(
					"The filtered articles could not be created", ex);
			}
			finally
			{
				conn.Disconnect();
			}


' Define the Publisher and publication names.
Dim publisherName As String = publisherInstance
Dim publicationName As String = "AdvWorksSalesOrdersMerge"
Dim publicationDbName As String = "AdventureWorks"

' Specify article names.
Dim articleName1 As String = "Employee"
Dim articleName2 As String = "SalesOrderHeader"
Dim articleName3 As String = "SalesOrderDetail"

' Specify join filter information.
Dim filterName12 As String = "SalesOrderHeader_Employee"
Dim filterClause12 As String = "Employee.EmployeeID = " + _
    "SalesOrderHeader.SalesPersonID"
Dim filterName23 As String = "SalesOrderDetail_SalesOrderHeader"
Dim filterClause23 As String = "SalesOrderHeader.SalesOrderID = " + _
    "SalesOrderDetail.SalesOrderID"

Dim salesSchema As String = "Sales"
Dim hrSchema As String = "HumanResources"

Dim article1 As MergeArticle = New MergeArticle()
Dim article2 As MergeArticle = New MergeArticle()
Dim article3 As MergeArticle = New MergeArticle()
Dim filter12 As MergeJoinFilter = New MergeJoinFilter()
Dim filter23 As MergeJoinFilter = New MergeJoinFilter()

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

' Create three merge articles that are horizontally partitioned
' using a parameterized row filter on Employee.EmployeeID, which is 
' extended to the two other articles using join filters. 
Try
    ' Connect to the Publisher.
    conn.Connect()

    ' Create each article. 
    ' For clarity, each article is defined separately. 
    ' In practice, iterative structures and arrays should 
    ' be used to efficiently create multiple articles.

    ' Set the required properties for the Employee article.
    article1.ConnectionContext = conn
    article1.Name = articleName1
    article1.DatabaseName = publicationDbName
    article1.SourceObjectName = articleName1
    article1.SourceObjectOwner = hrSchema
    article1.PublicationName = publicationName
    article1.Type = ArticleOptions.TableBased

    ' Define the parameterized filter clause based on Hostname.
    article1.FilterClause = "Employee.LoginID = HOST_NAME()"

    ' Set the required properties for the SalesOrderHeader article.
    article2.ConnectionContext = conn
    article2.Name = articleName2
    article2.DatabaseName = publicationDbName
    article2.SourceObjectName = articleName2
    article2.SourceObjectOwner = salesSchema
    article2.PublicationName = publicationName
    article2.Type = ArticleOptions.TableBased

    ' Set the required properties for the SalesOrderDetail article.
    article3.ConnectionContext = conn
    article3.Name = articleName3
    article3.DatabaseName = publicationDbName
    article3.SourceObjectName = articleName3
    article3.SourceObjectOwner = salesSchema
    article3.PublicationName = publicationName
    article3.Type = ArticleOptions.TableBased

    ' Create the articles, if they do not already exist.
    If article1.IsExistingObject = False Then
        article1.Create()
    End If
    If article2.IsExistingObject = False Then
        article2.Create()
    End If
    If article3.IsExistingObject = False Then
        article3.Create()
    End If

    ' Select published columns for SalesOrderHeader.
    ' Create an array of column names to vertically filter out.
    ' In this example, only one column is removed.
    Dim columns() As String = New String(0) {}

    columns(0) = "CreditCardApprovalCode"

    ' Remove the column.
    article2.RemoveReplicatedColumns(columns)

    ' Define a merge filter clauses that filter 
    ' SalesOrderHeader based on Employee and 
    ' SalesOrderDetail based on SalesOrderHeader. 

    ' Parent article.
    filter12.JoinArticleName = articleName1
    ' Child article.
    filter12.ArticleName = articleName2
    filter12.FilterName = filterName12
    filter12.JoinUniqueKey = True
    filter12.FilterTypes = FilterTypes.JoinFilter
    filter12.JoinFilterClause = filterClause12

    ' Add the join filter to the child article.
    article2.AddMergeJoinFilter(filter12)

    ' Parent article.
    filter23.JoinArticleName = articleName2
    ' Child article.
    filter23.ArticleName = articleName3
    filter23.FilterName = filterName23
    filter23.JoinUniqueKey = True
    filter23.FilterTypes = FilterTypes.JoinFilter
    filter23.JoinFilterClause = filterClause23

    ' Add the join filter to the child article.
    article3.AddMergeJoinFilter(filter23)

Catch ex As Exception
    ' Do error handling here and rollback the transaction.
    Throw New ApplicationException( _
        "The filtered articles could not be created", ex)
Finally
    conn.Disconnect()
End Try


This example changes and existing merge article to associate a business logic handler with the article. For more information, see How to: Implement a Business Logic Handler for a Merge Article (RMO Programming).

			// Define the Publisher, publication, and article names.
			string publisherName = publisherInstance;
			string publicationName = "AdvWorksSalesOrdersMerge";
			string publicationDbName = "AdventureWorks";
			string articleName = "SalesOrderHeader";
			
			// Set the friendly name of the business logic handler.
			string customLogic = "OrderEntryLogic";

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

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

				// Set the required properties for the article.
				article.ConnectionContext = conn;
				article.Name = articleName;
				article.DatabaseName = publicationDbName;
				article.PublicationName = publicationName;

				// Load the article properties.
				if (article.LoadProperties())
				{
					article.ArticleResolver = customLogic;
				}
				else
				{
					// Throw an exception of the article does not exist.
					throw new ApplicationException(String.Format(
					"{0} is not published in {1}", articleName, publicationName));
				}
				
			}
			catch (Exception ex)
			{
				// Do error handling here and rollback the transaction.
				throw new ApplicationException(String.Format(
					"The business logic handler {0} could not be associated with " +
					" the {1} article.",customLogic,articleName), ex);
			}
			finally
			{
				conn.Disconnect();
			}


' Define the Publisher, publication, and article names.
Dim publisherName As String = publisherInstance
Dim publicationName As String = "AdvWorksSalesOrdersMerge"
Dim publicationDbName As String = "AdventureWorks"
Dim articleName As String = "SalesOrderHeader"

' Set the friendly name of the business logic handler.
Dim customLogic As String = "OrderEntryLogic"

Dim article As MergeArticle = New MergeArticle()

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

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

    ' Set the required properties for the article.
    article.ConnectionContext = conn
    article.Name = articleName
    article.DatabaseName = publicationDbName
    article.PublicationName = publicationName

    ' Load the article properties.
    If article.LoadProperties() Then
        article.ArticleResolver = customLogic
    Else
        ' Throw an exception of the article does not exist.
        Throw New ApplicationException(String.Format( _
         "{0} is not published in {1}", articleName, publicationName))
    End If

Catch ex As Exception
    ' Do error handling here and rollback the transaction.
    Throw New ApplicationException(String.Format( _
     "The business logic handler {0} could not be associated with " + _
     " the {1} article.", customLogic, articleName), ex)
Finally
    conn.Disconnect()
End Try


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