在C#中运用SQLDMO备份和恢复SQL Server数据库(转)

在C#中运用SQLDMO备份和恢复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(有关COM的概念,请参看我的COM与COM+技术那篇文章),所以大家在用之前必须在.NET项目中添加对它的引用。

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:

public  sealed  class  DbOper
{
     ///<summary>
     /// DbOper类的构造函数
///作者:Shadow
     ///</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();
         }
     }
其中这个语句取得了所有的进程列表:
SQLDMO.QueryResults qr = svr.EnumProcesses(-1) ;
下面的语句找到和要恢复数据库相关的进程并杀死:
int iColPIDNum = -1 ;
int iColDbName = -1 ;
for(int i=1;i<=qr.Columns;i++)
{
string strName = qr.get_ColumnName(i) ;
if (strName.ToUpper().Trim() == "SPID")
{
iColPIDNum = i ;
}
else if (strName.ToUpper().Trim() == "DBNAME")
{
iColDbName = i ;
}
if (iColPIDNum != -1 && iColDbName != -1)
break ;
}

for(int i=1;i<=qr.Rows;i++)
{
int lPID = qr.GetColumnLong(i,iColPIDNum) ;
string strDBName = qr.GetColumnString(i,iColDbName) ;
if (strDBName.ToUpper() == strDbName.ToUpper())
svr.KillProcess(lPID) ;
}
 
     ///<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();
         }
     }
}

注册SQLDMO.dll用到的组件

SQLDMO.DLL
SQLDMO.rll
sqlresld.dl
sqlsvc.dll
sqlsvc.rll
Sqlwid.dll
Sqlwoa.dll
w95scm.dll

注:如果注册不成功请更新MDAC版本至2.8

posted @ 2008-04-28 14:56  古道轻风  阅读(316)  评论(0编辑  收藏  举报