本篇內(nèi)容介紹了“C#怎么備份及還原數(shù)據(jù)庫(kù)”的有關(guān)知識(shí),在實(shí)際案例的操作過(guò)程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
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C#數(shù)據(jù)庫(kù)備份及還原1.在用戶的配置時(shí),我們需要列出當(dāng)前局域網(wǎng)內(nèi)所有的數(shù)據(jù)庫(kù)服務(wù)器,并且要列出指定服務(wù)器的所有數(shù)據(jù)庫(kù),實(shí)現(xiàn)代碼如下:
取得數(shù)據(jù)庫(kù)服務(wù)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("取數(shù)據(jù)庫(kù)服務(wù)器列表出錯(cuò):"+e.Message)) ; } finally { sqlApp.Quit() ; } return alServers ; } 取得指定數(shù)據(jù)庫(kù)服務(wù)器的數(shù)據(jù)庫(kù)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("連接數(shù)據(jù)庫(kù)出錯(cuò):"+e.Message)) ; } finally { svr.DisConnect() ; sqlApp.Quit() ; } return alDbs ; }
C#數(shù)據(jù)庫(kù)備份及還原2.?dāng)?shù)據(jù)庫(kù)的備份和實(shí)時(shí)進(jìn)度顯示代碼:
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("備份數(shù)據(jù)庫(kù)失敗"+err.Message)) ; } finally { svr.DisConnect() ; } } private void Step(string message,int percent) { PBar.Value = percent ; }
其中,這兩個(gè)語(yǔ)句實(shí)現(xiàn)了進(jìn)度的實(shí)時(shí)顯示:
SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
bak.PercentComplete += pceh;
Step就是上面private void Step(string message,int percent) 的方法名稱,它用來(lái)顯示進(jìn)度條的當(dāng)前進(jìn)度。
C#數(shù)據(jù)庫(kù)備份及還原3.?dāng)?shù)據(jù)庫(kù)的恢復(fù)和殺死進(jìn)程的代碼:
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("恢復(fù)數(shù)據(jù)庫(kù)失敗,請(qǐng)關(guān)閉所有和該數(shù)據(jù)庫(kù)連接的程序!"+err.Message)) ; } finally { svr.DisConnect() ; } }
其中這個(gè)語(yǔ)句取得了所有的進(jìn)程列表:
SQLDMO.QueryResults qr = svr.EnumProcesses(-1) ;
下面的語(yǔ)句找到和要恢復(fù)數(shù)據(jù)庫(kù)相關(guān)的進(jìn)程并殺死:
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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