BusinessLogicModule.DeleteHandler Metode

Referensi

Definisi

Ruang nama:: Microsoft.SqlServer.Replication.BusinessLogicSupport

Rakitan:: Microsoft.SqlServer.Replication.BusinessLogicSupport.dll

Penting

Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Metode opsional yang mengimplementasikan logika bisnis kustom yang dipanggil saat pernyataan DELETE sedang diunggah atau diunduh.

public:
 virtual Microsoft::SqlServer::Replication::BusinessLogicSupport::ActionOnDataDelete DeleteHandler(Microsoft::SqlServer::Replication::BusinessLogicSupport::SourceIdentifier deleteSource, System::Data::DataSet ^ deletedDataSet, int % historyLogLevel, System::String ^ % historyLogMessage);

public virtual Microsoft.SqlServer.Replication.BusinessLogicSupport.ActionOnDataDelete DeleteHandler (Microsoft.SqlServer.Replication.BusinessLogicSupport.SourceIdentifier deleteSource, System.Data.DataSet deletedDataSet, ref int historyLogLevel, ref string historyLogMessage);

abstract member DeleteHandler : Microsoft.SqlServer.Replication.BusinessLogicSupport.SourceIdentifier * System.Data.DataSet * int * string -> Microsoft.SqlServer.Replication.BusinessLogicSupport.ActionOnDataDelete
override this.DeleteHandler : Microsoft.SqlServer.Replication.BusinessLogicSupport.SourceIdentifier * System.Data.DataSet * int * string -> Microsoft.SqlServer.Replication.BusinessLogicSupport.ActionOnDataDelete

Public Overridable Function DeleteHandler (deleteSource As SourceIdentifier, deletedDataSet As DataSet, ByRef historyLogLevel As Integer, ByRef historyLogMessage As String) As ActionOnDataDelete

Parameter

deleteSource: SourceIdentifier

Menentukan apakah penghapusan dimulai di Penerbit atau di Pelanggan.

deletedDataSet: DataSet

Himpunan data yang berisi GUID baris yang dihapus.

historyLogLevel: Int32

Tingkat log pesan kustom yang dikembalikan oleh logika bisnis kustom.

historyLogMessage: String

Pesan log yang disediakan oleh logika bisnis kustom. Pesan log ditulis ke database distribusi.

Mengembalikan

ActionOnDataDelete

Tindakan ActionOnDataDelete yang akan diambil oleh proses setelah logika bisnis kustom dijalankan.

Contoh

using System;
using System.Text;
using System.Data;
using System.Data.Common;
using Microsoft.SqlServer.Replication.BusinessLogicSupport;
using Microsoft.Samples.SqlServer.BusinessLogicHandler;

namespace Microsoft.Samples.SqlServer.BusinessLogicHandler
{
    public class OrderEntryBusinessLogicHandler :
      Microsoft.SqlServer.Replication.BusinessLogicSupport.BusinessLogicModule
    {
        // Variables to hold server names.
        private string publisherName;
        private string subscriberName;

        public OrderEntryBusinessLogicHandler()
        {
        }

        // Implement the Initialize method to get publication 
        // and subscription information.
        public override void Initialize(
            string publisher,
            string subscriber,
            string distributor,
            string publisherDB,
            string subscriberDB,
            string articleName)
        {
            // Set the Publisher and Subscriber names.
            publisherName = publisher;
            subscriberName = subscriber;
        }

        // Declare what types of row changes, conflicts, or errors to handle.
        override public ChangeStates HandledChangeStates
        {
            get
            {
                // Handle Subscriber inserts, updates and deletes.
                return ChangeStates.SubscriberInserts |
                  ChangeStates.SubscriberUpdates | ChangeStates.SubscriberDeletes;
            }
        }

        public override ActionOnDataChange InsertHandler(SourceIdentifier insertSource,
          DataSet insertedDataSet, ref DataSet customDataSet, ref int historyLogLevel,
          ref string historyLogMessage)
        {
            if (insertSource == SourceIdentifier.SourceIsSubscriber)
            {
                // Build a line item in the audit message to log the Subscriber insert.
                StringBuilder AuditMessage = new StringBuilder();
                AuditMessage.Append(String.Format("A new order was entered at {0}. " +
                  "The SalesOrderID for the order is :", subscriberName));
                AuditMessage.Append(insertedDataSet.Tables[0].Rows[0]["SalesOrderID"].ToString());
                AuditMessage.Append("The order must be shipped by :");
                AuditMessage.Append(insertedDataSet.Tables[0].Rows[0]["DueDate"].ToString());

                // Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString();
                
                // Set the history log level to the default verbose level.
                historyLogLevel = 1;

                // Accept the inserted data in the Subscriber's data set and 
                // apply it to the Publisher.
                return ActionOnDataChange.AcceptData;
            }
            else
            {
                return base.InsertHandler(insertSource, insertedDataSet, ref customDataSet,
                  ref historyLogLevel, ref historyLogMessage);
            }
        }

        public override ActionOnDataChange UpdateHandler(SourceIdentifier updateSource,
          DataSet updatedDataSet, ref DataSet customDataSet, ref int historyLogLevel,
          ref string historyLogMessage)
        {
            if (updateSource == SourceIdentifier.SourceIsPublisher)
            {
                // Build a line item in the audit message to log the Subscriber update.
                StringBuilder AuditMessage = new StringBuilder();
                AuditMessage.Append(String.Format("An existing order was updated at {0}. " +
                  "The SalesOrderID for the order is ", subscriberName));
                AuditMessage.Append(updatedDataSet.Tables[0].Rows[0]["SalesOrderID"].ToString());
                AuditMessage.Append("The order must now be shipped by :");
                AuditMessage.Append(updatedDataSet.Tables[0].Rows[0]["DueDate"].ToString());

                // Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString();
                // Set the history log level to the default verbose level.
                historyLogLevel = 1;

                // Accept the updated data in the Subscriber's data set and apply it to the Publisher.
                return ActionOnDataChange.AcceptData;
            }
            else
            {
                return base.UpdateHandler(updateSource, updatedDataSet,
                  ref customDataSet, ref historyLogLevel, ref historyLogMessage);
            }
        }

        public override ActionOnDataDelete DeleteHandler(SourceIdentifier deleteSource,
          DataSet deletedDataSet, ref int historyLogLevel, ref string historyLogMessage)
        {
            if (deleteSource == SourceIdentifier.SourceIsSubscriber)
            {
                // Build a line item in the audit message to log the Subscriber deletes.
                // Note that the rowguid is the only information that is 
                // available in the dataset.
                StringBuilder AuditMessage = new StringBuilder();
                AuditMessage.Append(String.Format("An existing order was deleted at {0}. " +
                  "The rowguid for the order is ", subscriberName));
                AuditMessage.Append(deletedDataSet.Tables[0].Rows[0]["rowguid"].ToString());

                // Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString();
                // Set the history log level to the default verbose level.
                historyLogLevel = 1;

                // Accept the delete and apply it to the Publisher.
                return ActionOnDataDelete.AcceptDelete;
            }
            else
            {
                return base.DeleteHandler(deleteSource, deletedDataSet,
                  ref historyLogLevel, ref historyLogMessage);
            }
        }
    }
}

Imports System
Imports System.Text
Imports System.Data
Imports System.Data.Common
Imports Microsoft.SqlServer.Replication.BusinessLogicSupport

Namespace Microsoft.Samples.SqlServer.BusinessLogicHandler
    Public Class OrderEntryBusinessLogicHandler
        Inherits BusinessLogicModule

        ' Variables to hold server names.
        Private publisherName As String
        Private subscriberName As String

        ' Implement the Initialize method to get publication 
        ' and subscription information.
        Public Overrides Sub Initialize( _
        ByVal publisher As String, _
        ByVal subscriber As String, _
        ByVal distributor As String, _
        ByVal publisherDB As String, _
        ByVal subscriberDB As String, _
        ByVal articleName As String _
      )
            ' Set the Publisher and Subscriber names.
            publisherName = publisher
            subscriberName = subscriber
        End Sub

        ' Declare what types of row changes, conflicts, or errors to handle.
        Public Overrides ReadOnly Property HandledChangeStates() As ChangeStates
            Get
                ' Handle Subscriber inserts, updates and deletes.
                Return (ChangeStates.SubscriberInserts Or _
                 ChangeStates.SubscriberUpdates Or ChangeStates.SubscriberDeletes)
            End Get
        End Property

        Public Overrides Function InsertHandler(ByVal insertSource As SourceIdentifier, _
        ByVal insertedDataSet As DataSet, ByRef customDataSet As DataSet, _
        ByRef historyLogLevel As Integer, ByRef historyLogMessage As String) _
        As ActionOnDataChange

            If insertSource = SourceIdentifier.SourceIsSubscriber Then
                ' Build a line item in the audit message to log the Subscriber insert.
                Dim AuditMessage As StringBuilder = New StringBuilder()
                AuditMessage.Append(String.Format("A new order was entered at {0}. " + _
                 "The SalesOrderID for the order is :", subscriberName))
                AuditMessage.Append(insertedDataSet.Tables(0).Rows(0)("SalesOrderID").ToString())
                AuditMessage.Append("The order must be shipped by :")
                AuditMessage.Append(insertedDataSet.Tables(0).Rows(0)("DueDate").ToString())

                ' Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString()

                ' Set the history log level to the default verbose level.
                historyLogLevel = 1

                ' Accept the inserted data in the Subscriber's data set and 
                ' apply it to the Publisher.
                Return ActionOnDataChange.AcceptData
            Else
                Return MyBase.InsertHandler(insertSource, insertedDataSet, customDataSet, _
                 historyLogLevel, historyLogMessage)
            End If
        End Function
        Public Overrides Function UpdateHandler(ByVal updateSource As SourceIdentifier, _
        ByVal updatedDataSet As DataSet, ByRef customDataSet As DataSet, _
        ByRef historyLogLevel As Integer, ByRef historyLogMessage As String) _
        As ActionOnDataChange

            If updateSource = SourceIdentifier.SourceIsPublisher Then
                ' Build a line item in the audit message to log the Subscriber update.
                Dim AuditMessage As StringBuilder = New StringBuilder()
                AuditMessage.Append(String.Format("An existing order was updated at {0}. " + _
                 "The SalesOrderID for the order is ", subscriberName))
                AuditMessage.Append(updatedDataSet.Tables(0).Rows(0)("SalesOrderID").ToString())
                AuditMessage.Append("The order must now be shipped by :")
                AuditMessage.Append(updatedDataSet.Tables(0).Rows(0)("DueDate").ToString())

                ' Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString()
                ' Set the history log level to the default verbose level.
                historyLogLevel = 1

                ' Accept the updated data in the Subscriber's data set and apply it to the Publisher.
                Return ActionOnDataChange.AcceptData
            Else
                Return MyBase.UpdateHandler(updateSource, updatedDataSet, _
                 customDataSet, historyLogLevel, historyLogMessage)
            End If
        End Function
        Public Overrides Function DeleteHandler(ByVal deleteSource As SourceIdentifier, _
        ByVal deletedDataSet As DataSet, ByRef historyLogLevel As Integer, _
         ByRef historyLogMessage As String) As ActionOnDataDelete
            If deleteSource = SourceIdentifier.SourceIsSubscriber Then
                ' Build a line item in the audit message to log the Subscriber deletes.
                ' Note that the rowguid is the only information that is 
                ' available in the dataset.
                Dim AuditMessage As StringBuilder = New StringBuilder()
                AuditMessage.Append(String.Format("An existing order was deleted at {0}. " + _
                 "The rowguid for the order is ", subscriberName))
                AuditMessage.Append(deletedDataSet.Tables(0).Rows(0)("rowguid").ToString())

                ' Set the reference parameter to write the line to the log file.
                historyLogMessage = AuditMessage.ToString()
                ' Set the history log level to the default verbose level.
                historyLogLevel = 1

                ' Accept the delete and apply it to the Publisher.
                Return ActionOnDataDelete.AcceptDelete
            Else
                Return MyBase.DeleteHandler(deleteSource, deletedDataSet, _
                 historyLogLevel, historyLogMessage)
            End If
        End Function
    End Class
End Namespace

Berlaku untuk

Lihat juga

SourceIdentifier

Bagikan melalui