Question

我需要更新现有数据或将客户数据库中的新数据说成DB1到中央数据库说DB2，两者都持有相同的模式，两个数据库都驻留在同一台机器上。
更新是不是双向的。我只是希望将更改从客户端（DB1）反映到服务器（DB2）客户端数据库（DB1）只是DB2的备份数据库（由mdf和ldf文件组成的完整数据库备份）。备份数据库（DB1）已经具有修改后的数据同步。

那么我如何以编程方式使用C＃.NET？您能提供任何示例代码吗？
我用Google搜索并看到了Microsoft Syn Framework，但我不知道如何在C＃中以编程方式使用它。你能帮我解决一下示例代码吗？对不起我的英文。
提前谢谢。

Answer 1

使用下面的数据库镜像概念我提到了实现镜像的步骤，下面是步骤

Step 1: Create encryption key, certificate and end-points on Principal Instance

/* Execute this against the Principal Instance */
USE MASTER
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Password!'
GO
CREATE CERTIFICATE HOST_PRIN_cert
    WITH SUBJECT = 'HOST_PRIN certificate',
    START_DATE = '01/07/2009'
GO
CREATE ENDPOINT End_Mirroring
    STATE = STARTED
    AS TCP (LISTENER_PORT = 5022, LISTENER_IP = ALL)
    FOR DATABASE_MIRRORING
    (
        AUTHENTICATION = CERTIFICATE HOST_PRIN_cert,
        ENCRYPTION = REQUIRED ALGORITHM RC4,
        ROLE = ALL
    )
GO
BACKUP CERTIFICATE HOST_PRIN_cert
    TO FILE = 'D:\certificate\HOST_PRIN_cert.cer'
GO

Step 2: Create encryption key, certificate and end-points on Mirror Instance

/* Execute this against the Mirror Instance */
USE master
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Password!'
GO
CREATE CERTIFICATE HOST_MIRR_cert
    WITH SUBJECT = 'HOST_MIRR certificate',
    START_DATE = '01/07/2009'
GO
CREATE ENDPOINT End_Mirroring
    STATE = STARTED
    AS TCP (LISTENER_PORT = 5023, LISTENER_IP = ALL)
    FOR DATABASE_MIRRORING
    (
        AUTHENTICATION = CERTIFICATE HOST_MIRR_cert,
        ENCRYPTION = REQUIRED ALGORITHM RC4,
        ROLE = ALL
    )
GO
BACKUP CERTIFICATE HOST_MIRR_cert 
    TO FILE = 'D:\certificate\HOST_MIRR_cert.cer';
GO

Step 3: Create login, user and associate certificate with user on Principal Instance

/* 
*  Execute this against the Principal Instance. The HOST_MIRR_cert.cer
*  needs to be copied on the Principal Server.
*/
USE MASTER
GO
/*
*  We are creating a SQL Login here. For Windows logins,
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_MIRR_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_MIRR_user FOR LOGIN HOST_MIRR_login
GO
CREATE CERTIFICATE HOST_MIRR_cert
    AUTHORIZATION HOST_MIRR_user
    FROM FILE = 'D:\certificate\HOST_MIRR_cert.cer'
GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_MIRR_login]
GO


Step 4: Create login, user and associate certificate with user on Mirror Instance

/* 
*  Execute this against the Mirror Instance. The HOST_PRIN_cert.cer
*  needs to be copied on the Mirror Server.
*/
USE MASTER
GO
/*
*  We are creating a SQL Login here. For Windows logins, 
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_PRIN_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_PRIN_user FOR LOGIN HOST_PRIN_login
GO
CREATE CERTIFICATE HOST_PRIN_cert
    AUTHORIZATION HOST_PRIN_user
    FROM FILE = 'D:\certificate\HOST_PRIN_cert.cer'
    GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_PRIN_login]
GO

Step 5: Create encryption key, certificate and end-points on Witness Instance

/* Execute this against the Witness Instance */
USE MASTER
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Password!'
GO
CREATE CERTIFICATE HOST_WITT_cert
    WITH SUBJECT = 'HOST_WITT certificate',
    START_DATE = '01/07/2009'
GO
CREATE ENDPOINT End_Mirroring
    STATE = STARTED
    AS TCP (LISTENER_PORT = 5024, LISTENER_IP = ALL)
    FOR DATABASE_MIRRORING
    (
        AUTHENTICATION = CERTIFICATE HOST_WITT_cert,
        ENCRYPTION = REQUIRED ALGORITHM RC4,
        ROLE = Witness
    )
GO
BACKUP CERTIFICATE HOST_WITT_cert
    TO FILE = 'D:\certificate\HOST_WITT_cert.cer'
GO

Step 6: Create login, user and associate certificate with user on Principal Instance

/*
*  Execute this against the Principal Instance. The HOST_WITT_cert.cer
*  needs to be copied on the Principal Server.
*/
USE MASTER
GO
/*
*  We are creating a SQL Login here. For Windows logins,
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_WITT_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_WITT_user FOR LOGIN HOST_WITT_login
GO
CREATE CERTIFICATE HOST_WITT_cert
    AUTHORIZATION HOST_WITT_user
    FROM FILE = 'D:\certificate\HOST_WITT_cert.cer'
GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_WITT_login]
GO

Step 7: Create login, user and associate certificate with user on Mirror Instance

/*
*  Execute this against the Mirror Instance. The HOST_WITT_cert.cer
*  needs to be copied on the Mirror Server.
*/
USE MASTER
GO
/*
*  We are creating a SQL Login here. For Windows logins,
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_WITT_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_WITT_user FOR LOGIN HOST_WITT_login
GO
CREATE CERTIFICATE HOST_WITT_cert
    AUTHORIZATION HOST_WITT_user
    FROM FILE = 'D:\certificate\HOST_WITT_cert.cer'
GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_WITT_login]
GO

Step 8: Create login, user and associate certificate with user on Witness Instance

/*
*  Execute this against the Witness Instance. The HOST_PRIN_cert.cer
*  and HOST_MIRR_cert.cer needs to be copied on the Witness Server.
*/
USE MASTER
GO
/*
*  We are creating a SQL Login here. For Windows logins,
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_PRIN_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_PRIN_user FOR LOGIN HOST_PRIN_login
GO
CREATE CERTIFICATE HOST_PRIN_cert
    AUTHORIZATION HOST_PRIN_user
    FROM FILE = 'D:\certificate\HOST_PRIN_cert.cer'
GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_PRIN_login]
GO
/*
*  We are creating a SQL Login here. For Windows logins,
*  use the Grant Login instead of Create Login
*/
CREATE LOGIN HOST_MIRR_login WITH PASSWORD = 'Password!'
GO
CREATE USER HOST_MIRR_user FOR LOGIN HOST_MIRR_login
GO
CREATE CERTIFICATE HOST_MIRR_cert
AUTHORIZATION HOST_MIRR_user
FROM FILE = 'D:\certificate\HOST_MIRR_cert.cer'
GO
GRANT CONNECT ON ENDPOINT::End_Mirroring TO [HOST_MIRR_login]
GO

Step 9: Create the Mirrored Database on the Mirror Server using backups from the Principal Server

/*
*  Execute this against the Principal Instance.
*/
USE MASTER
GO
BACKUP DATABASE MirrorDB
    TO DISK = 'D:\Backups\MirrorDB_FullBackup.bak'
GO
BACKUP LOG MirrorDB
    TO DISK = 'D:\Backups\MirrorDB_LogBackup.trn'
GO
/*
*  Copy MirrorDB_FullBackup.bak and MirrorDB_LogBackup.trn to the
*  Mirror Server.
*  Execute this against the Mirror Instance.
*/
USE MASTER
GO
RESTORE DATABASE MirrorDB
    FROM DISK = 'D:\Backups\MirrorDB_FullBackup.bak'
    WITH NORECOVERY
GO
RESTORE LOG MirrorDB
    FROM DISK = 'D:\Backups\MirrorDB_LogBackup.trn'
    WITH NORECOVERY
GO

Step 10: Setup Mirroring

/*
*  Execute this against the Mirror Instance.
*/
ALTER DATABASE MirrorDB
    SET PARTNER = 'TCP://<<your principal server name here>>:5022'
GO
/*
*  Execute this against the Principal Instance.
*/
ALTER DATABASE MirrorDB
    SET PARTNER = 'TCP://<<your mirror server name here>>:5023'
GO
ALTER DATABASE MirrorDB
    SET WITNESS = 'TCP://<<your witness server name here>>:5024'
GO

At this point your Database Mirroring should be up and running. You can use the Database Mirroring Monitor to verify the setup as well as to monitor the Synchronization status.

使用以下链接清楚了解 http://blogs.msdn.com/b/suhde/archive/2009/07/13/step-by-step-guide-to-configure-database-mirroring-between-sql-server-instances-in-a-workgroup.aspx

Answer 2

这应该向您展示如何在Sync Framework中执行此操作：Tutorial: Synchronizing SQL Server and SQL Express

但我并不完全相信为什么你必须以编程方式或点击按钮完成此操作。

取决于您可以承受多少延迟/延迟来实现对其他数据库的影响以及您需要的更多内容，您可以查看其他选项，如镜像，复制，触发器等......

以编程方式使用C＃同步两个数据库

2 个答案: