C#数据库备份及还原的实现代码

 // 1．在用户的配置时，我们需要列出当前局域网内所有的数据库服务器，并且要列出指定服务器的所有数据库，实现代码如下：

    //取得数据库服务器列表：
        public ArrayList GetServerList()
        {
            ArrayList alServers = new ArrayList();
            SQLDMO.Application sqlApp = new SQLDMO.ApplicationClass();
            try
            {
                SQLDMO.NameList serverList = sqlApp.ListAvailableSQLServers();
                for (int i = 1; i <= serverList.Count; i++)
                {
                    alServers.Add(serverList.Item(i));
                }
            }
            catch (Exception e)
            {
                throw (new Exception("取数据库服务器列表出错：" + e.Message));
            }
            finally { sqlApp.Quit(); }
            return alServers;
        }     
        //取得指定数据库服务器的数据库列表   
        public ArrayList GetDbList(string strServerName, string strUserName, string strPwd)
        {
            ServerName = strServerName;
            UserName = strUserName;
            Password = strPwd;

            ArrayList alDbs = new ArrayList();
            SQLDMO.Application sqlApp = new SQLDMO.ApplicationClass();
            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                foreach (SQLDMO.Database db in svr.Databases)
                {
                    if (db.Name != null)
                        alDbs.Add(db.Name);
                }
            }
            catch (Exception e)
            {
                throw (new Exception("连接数据库出错：" + e.Message));
            }
            finally
            {
                svr.DisConnect();
                sqlApp.Quit();
            }
            return alDbs;
        }
//     //2．数据库的备份和实时进度显示代码： 

        public bool BackUPDB(string strDbName, string strFileName, ProgressBar pgbMain)
        {
            PBar = pgbMain; SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                SQLDMO.Backup bak = new SQLDMO.BackupClass();
                bak.Action = 0;
                bak.Initialize = true;
                SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
                bak.PercentComplete += pceh;
                bak.Files = strFileName;
                bak.Database = strDbName;
                bak.SQLBackup(svr);
                return true;
            }
            catch (Exception err) 
            { 
                throw (new Exception("备份数据库失败" + err.Message));
            }
            finally 
            { 
                svr.DisConnect(); 
            }
        }
        private void Step(string message, int percent)
        {
            PBar.Value = percent;
        }     
      //其中，这两个语句实现了进度的实时显示：

     //SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new    
     //SQLDMO.BackupSink_PercentCompleteEventHandler(Step); 
     //bak.PercentComplete += pceh;

     //Step就是上面private void Step(string message,int percent) 的方法名称，它用来显示进度条的当前进度。

    //3．数据库的恢复和杀死进程的代码：

        public bool RestoreDB(string strDbName, string strFileName, ProgressBar pgbMain)
        {
            PBar = pgbMain;
            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                SQLDMO.QueryResults qr = svr.EnumProcesses(-1);
                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);
                }
                SQLDMO.Restore res = new SQLDMO.RestoreClass();
                res.Action = 0;
                SQLDMO.RestoreSink_PercentCompleteEventHandler pceh = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Step);
                res.PercentComplete += pceh;
                res.Files = strFileName;
                res.Database = strDbName; res.ReplaceDatabase = true; res.SQLRestore(svr);
                return true;
            }
            catch (Exception err)
            {
                throw (new Exception("恢复数据库失败,请关闭所有和该数据库连接的程序！" + err.Message));
            }
            finally
            {
                svr.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) ; 
             }  

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