C#数据库备份及还原的实现代码

【转载】http://www.codesky.net/article/200908/128600.html

 

C#数据库备份及还原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 ;   
}  

C#数据库备份及还原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。

C#数据库备份及还原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) ;   
}  

 

 

C#数据库备份及还原的实现代码【转载】,古老的榕树,5-wow.com

郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。