通过SQLDMO,我们可以实现SQL Server备份还原,下面就将为您详细介绍SQLDMO的概念及实现SQL Server备份还原的方法,供您参考。
SQLDMO(SQL Distributed Management Objects,SQL分布式管理对象)封装了Microsoft SQL Server数据库中的对象。
SQLDMO是Microsoft SQL Server中企业管理器所使用的应用程序接口,所以它可以执行很多功能,其中当然也包括对数据库的备份和恢复。
SQLDMO由Microsoft SQL Server自带的SQLDMO.dll提供,由于SQLDMO.dll是一个COM对象,所以大家在用之前必须在.NET项目中添加对它的引用,如下图所示:
在.NET项目中添加对SQLDMO的引用
下面是用C#语言书写的用于Microsoft SQL Server数据库备份和恢复的类:
- using System;
- namespace DbService
- {
- /// <summary>
- /// DbOper类,主要应用SQLDMO实现对Microsoft SQL Server数据库的备份和恢复
- /// </summary>
- public sealed class DbOper
- {
- /// <summary>
- /// DbOper类的构造函数
- /// </summary>
- private DbOper()
- {
- }
- /// <summary>
- /// 数据库备份
- /// </summary>
- public static void DbBackup()
- {
- SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
- SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
- try
- {
- oSQLServer.LoginSecure = false;
- oSQLServer.Connect("localhost", "sa", "1234");
- oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
- oBackup.Database = "Northwind";
- oBackup.Files = @"d:\Northwind.bak";
- oBackup.BackupSetName = "Northwind";
- oBackup.BackupSetDescription = "数据库备份";
- oBackup.Initialize = true;
- oBackup.SQLBackup(oSQLServer);
- }
- catch
- {
- throw;
- }
- finally
- {
- oSQLServer.DisConnect();
- }
- }
- /// <summary>
- /// 数据库恢复
- /// </summary>
- public static void DbRestore()
- {
- SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
- SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
- try
- {
- oSQLServer.LoginSecure = false;
- oSQLServer.Connect("localhost", "sa", "1234");
- oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
- oRestore.Database = "Northwind";
- oRestore.Files = @"d:\Northwind.bak";
- oRestore.FileNumber = 1;
- oRestore.ReplaceDatabase = true;
- oRestore.SQLRestore(oSQLServer);
- }
- catch
- {
- throw;
- }
- finally
- {
- oSQLServer.DisConnect();
- }
- }
- }
- }
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