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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