利用SQLDMO对数据库进行备份与还原

    首先添加对sqldmo.dll的引用，位置在C:\Program Files\Microsoft SQL Server\80\Tools\Binn目录下，然后在程序中加入using SQLDMO；引用
注意(SQLDOM必须运行在SQL Server SP2或以上版本)
//备份数据库
private void BeginBackUp(string FileName,string uid,string pwd)
{

string Path =FileName;
   
   //实例化SQLDMO的各个对象
   SQLDMO.Backup backup = new SQLDMO.BackupClass();
   SQLDMO.SQLServer server = new SQLDMO.SQLServerClass();

   try
   {
    //设置安全验证
    server.LoginSecure=false;
    //设置连接数据库
    server.Connect("(local)",uid,pwd);
    backup.Action=0;

    //方法绑定
    SQLDMO.BackupSink_PercentCompleteEventHandler percent = new SQLDMO.BackupSink_PercentCompleteEventHandler(ShowProcessBar);
    backup.PercentComplete +=percent;
    
    //设置备份的数据库
    backup.Database="LibraryClass";
    //设置备份文件名
    backup.BackupSetName="LibraryClassbackup";
    //设置备份文件描述
    backup.BackupSetDescription="BackUp";
    Path = Path + backup.BackupSetName.ToString() ;
    //设置存储路径
    backup.Files=@Path;
    backup.Initialize=true;
    //设置备份服务器--与server关联
    backup.SQLBackup(server);

    MessageBox.Show("备份成功!");
   catch(Exception ex)
   {
    MessageBox.Show("备份失败，请检查！" +"\n" + ex.Message.ToString() );
   }
   finally
   {
    //释放对象
    server.DisConnect();
    server=null;
    backup=null;
   }
}
private void ShowProcessBar(string message,int percent)
  {
   //显示进度条
   this.pbProcess.Value=percent;
  }

//还原数据库

//实例SQLDMO还原对象
private void RealeaseBD(string FileName,string uid,string pwd)
{
   SQLDMO.Restore restore = new SQLDMO.RestoreClass();
   SQLDMO.SQLServer server = new SQLDMO.SQLServerClass();
   try
   {
    server.LoginSecure=false;

    //设置连接数据库
    server.Connect("(local)",uid,pwd);

    //触发还原数据库方法
    SQLDMO.RestoreSink_PercentCompleteEventHandler percent = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Show);
    restore.PercentComplete +=percent;

    restore.Action =SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;

    //设置需还原的数据库
    restore.Database="LibraryClass";
    //备份文件存放路径
    restore.Files=FileName
    restore.ReplaceDatabase=true;
    restore.FileNumber=1;
    //设置还原服务器
    restore.SQLRestore(server);
    MessageBox.Show("还原成功!");
   }
    //异常处理
   catch(Exception ex)
   {
    MessageBox.Show("还原数据库出错" + "\n" + ex.Message);
   }
    //释放对象
   finally
   {
    server.DisConnect();
    restore=null;
    server=null;
   }
}
  private void Show(string Message,int percent)
  {
   this.pBarProcess.Value=percent;
  }