在C#中运用SQLDMO备份和恢复Microsoft SQL Server数据库

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：

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();

}

}

}

}