SQLDMO(SQL Distributed Management Objects,SQL分布式管理對象)封裝了Microsoft SQL Server資料庫中的對象。SQLDMO是Microsoft SQL Server中企業管理器所使用的應用程式接口,是以它可以執行很多功能,其中當然也包括對資料庫的備份和恢複。
SQLDMO由Microsoft SQL Server自帶的SQLDMO.dll提供,由于SQLDMO.dll是一個COM對象(有關COM的概念,請參看我的COM與COM+技術那篇文章),是以大家在用之前必須在.Net項目中添加對它的引用。
下面是用C#語言書寫的用于Microsoft SQL Server資料庫備份和恢複的類:
public sealed class DbOper
{
///<summary>
/// DbOper類的構造函數
///作者:Shadow
///</summary>
private DbOper()
{
}
/// 資料庫備份
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 = "資料庫備份";
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);
}
catch
throw;
finally
oSQLServer.DisConnect();
/// 資料庫恢複
public static void DbRestore()
SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
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);
}