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VB实现SQL Server数据库备份/恢复

来源:互联网网民  宽屏版  评论
2006-12-16 17:28:38

'*************************************************************************

'**模 块 名:fBackupDatabase_a

'**描 述:备份数据库,返回出错信息,正常恢复,返回""

'**调 用:fBackupDatabase_a "备份文件名","数据库名"

'**参数说明:

'** sBackUpfileName 恢复后的数据库存放目录

'** sDataBaseName 备份的数据名

'** sIsAddBackup 是否追加到备份文件中

'**说 明:引用Microsoft ActiveX Data Objects 2.x Library

'**创 建 人:邹建

'**日 期:2003年12月09日

'*************************************************************************

Public Function fBackupDatabase_a(ByVal sBackUpfileName$ _

, ByVal sDataBaseName$ _

, Optional ByVal sIsAddBackup As Boolean = False _

) As String

Dim iDb As ADODB.Connection

Dim iConcStr$, iSql$, iReturn$

On Error GoTo lbErr

'创建对象

Set iDb = New ADODB.Connection

'连接数据库服务器,根据你的情况修改连接字符串

iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj"

iDb.Open iConcStr

'生成数据库备份语句

iSql = "backup database [" & sDataBaseName & "]" & vbCrLf & _

"to disk='" & sBackUpfileName & "'" & vbCrLf & _

"with description='" & "zj-backup at:" & Date & "(" & Time & ")'" & vbCrLf & _

IIf(sIsAddBackup, "", ",init")

iDb.Execute iSql

GoTo lbExit

lbErr:

iReturn = Error

lbExit:

fBackupDatabase_a = iReturn

End Function

'*************************************************************************

'**模 块 名:frestoredatabase_a

'**描 述:恢复数据库,返回出错信息,正常恢复,返回""

'**调 用:frestoredatabase_a "备份文件名","数据库名"

'**参数说明:

'** sDataBasePath 恢复后的数据库存放目录

'** sBackupNumber 是从那个备份号恢复

'** sReplaceExist 指定是否覆盖已经存在的数据

'**说 明:引用Microsoft ActiveX Data Objects 2.x Library

'**创 建 人:邹建

'**日 期:2003年12月09日

'*************************************************************************

Public Function fRestoreDatabase_a(ByVal sBackUpfileName$ _

, ByVal sDataBaseName$ _

, Optional ByVal sDataBasePath$ = "" _

, Optional ByVal sBackupNumber& = 1 _

, Optional ByVal sReplaceExist As Boolean = False _

) As String

Dim iDb As ADODB.Connection, iRe As ADODB.Recordset

Dim iConcStr$, iSql$, iReturn$, iI&

On Error GoTo lbErr

'创建对象

Set iDb = New ADODB.Connection

Set iRe = New ADODB.Recordset

'连接数据库服务器,根据你的情况修改连接字符串

iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj"

iDb.Open iConcStr

'得到还原后的数据库存放目录,如果没有指定,存放到SQL SERVER的DATA目录

If sDataBasePath = "" Then

iSql = "select filename from master..sysfiles"

iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly

iSql = iRe(0)

iRe.Close

sDataBasePath = Left(iSql, InStrRev(iSql, "\"))

End If

'检查数据库是否存在

If sReplaceExist = False Then

iSql = "select 1 from master..sysdatabases where name='" & sDataBaseName & "'"

iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly

If iRe.EOF = False Then

iReturn = "数据库已经存在!"

iRe.Close

GoTo lbExit

End If

iRe.Close

End If

'关闭用户进程,防止其它用户正在使用数据库,导致数据恢复失败

iSql = "select spid from master..sysprocesses where dbid=db_id('" & sDataBaseName & "')"

iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly

While iRe.EOF = False

iSql = "kill " & iRe(0)

iDb.Execute iSql

iRe.MoveNext

Wend

iRe.Close

'获取数据库恢复信息

iSql = "restore filelistonly from disk='" & sBackUpfileName & "'" & vbCrLf & _

"with file=" & sBackupNumber

iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly

'生成数据库恢复语句

iSql = "restore database [" & sDataBaseName & "]" & vbCrLf & _

"from disk='" & sBackUpfileName & "'" & vbCrLf & _

"with file=" & sBackupNumber & vbCrLf

With iRe

While Not .EOF

iReturn = iRe("PhysicalName")

iI = InStrRev(iReturn, ".")

iReturn = IIf(iI = 0, "", Mid(iReturn, iI)) & "'"

iSql = iSql & ",move '" & iRe("LogicalName") & _

"' to '" & sDataBasePath & sDataBaseName & iReturn & vbCrLf

.MoveNext

Wend

.Close

End With

iSql = iSql & IIf(sReplaceExist, ",replace", "")

iDb.Execute iSql

iReturn = ""

GoTo lbExit

lbErr:

iReturn = Error

lbExit:

fRestoreDatabase_a = iReturn

End Function

 
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'************************************************************************* '**模 块 名:fBackupDatabase_a '**描 述:备份数据库,返回出错信息,正常恢复,返回"" '**调 用:fBackupDatabase_a "备份文件名","数据库名" '**参数说明: '** sBackUpfileName 恢复后的数据库存放目录 '** sDataBaseName 备份的数据名 '** sIsAddBackup 是否追加到备份文件中 '**说 明:引用Microsoft ActiveX Data Objects 2.x Library '**创 建 人:邹建 '**日 期:2003年12月09日 '************************************************************************* Public Function fBackupDatabase_a(ByVal sBackUpfileName$ _ , ByVal sDataBaseName$ _ , Optional ByVal sIsAddBackup As Boolean = False _ ) As String Dim iDb As ADODB.Connection Dim iConcStr$, iSql$, iReturn$ On Error GoTo lbErr '创建对象 Set iDb = New ADODB.Connection '连接数据库服务器,根据你的情况修改连接字符串 iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj" iDb.Open iConcStr '生成数据库备份语句 iSql = "backup database [" & sDataBaseName & "]" & vbCrLf & _ "to disk='" & sBackUpfileName & "'" & vbCrLf & _ "with description='" & "zj-backup at:" & Date & "(" & Time & ")'" & vbCrLf & _ IIf(sIsAddBackup, "", ",init") iDb.Execute iSql GoTo lbExit lbErr: iReturn = Error lbExit: fBackupDatabase_a = iReturn End Function '************************************************************************* '**模 块 名:frestoredatabase_a '**描 述:恢复数据库,返回出错信息,正常恢复,返回"" '**调 用:frestoredatabase_a "备份文件名","数据库名" '**参数说明: '** sDataBasePath 恢复后的数据库存放目录 '** sBackupNumber 是从那个备份号恢复 '** sReplaceExist 指定是否覆盖已经存在的数据 '**说 明:引用Microsoft ActiveX Data Objects 2.x Library '**创 建 人:邹建 '**日 期:2003年12月09日 '************************************************************************* Public Function fRestoreDatabase_a(ByVal sBackUpfileName$ _ , ByVal sDataBaseName$ _ , Optional ByVal sDataBasePath$ = "" _ , Optional ByVal sBackupNumber& = 1 _ , Optional ByVal sReplaceExist As Boolean = False _ ) As String Dim iDb As ADODB.Connection, iRe As ADODB.Recordset Dim iConcStr$, iSql$, iReturn$, iI& On Error GoTo lbErr '创建对象 Set iDb = New ADODB.Connection Set iRe = New ADODB.Recordset '连接数据库服务器,根据你的情况修改连接字符串 iConcStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Data Source=zj" iDb.Open iConcStr '得到还原后的数据库存放目录,如果没有指定,存放到SQL SERVER的DATA目录 If sDataBasePath = "" Then iSql = "select filename from master..sysfiles" iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly iSql = iRe(0) iRe.Close sDataBasePath = Left(iSql, InStrRev(iSql, "\")) End If '检查数据库是否存在 If sReplaceExist = False Then iSql = "select 1 from master..sysdatabases where name='" & sDataBaseName & "'" iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly If iRe.EOF = False Then iReturn = "数据库已经存在!" iRe.Close GoTo lbExit End If iRe.Close End If '关闭用户进程,防止其它用户正在使用数据库,导致数据恢复失败 iSql = "select spid from master..sysprocesses where dbid=db_id('" & sDataBaseName & "')" iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly While iRe.EOF = False iSql = "kill " & iRe(0) iDb.Execute iSql iRe.MoveNext Wend iRe.Close '获取数据库恢复信息 iSql = "restore filelistonly from disk='" & sBackUpfileName & "'" & vbCrLf & _ "with file=" & sBackupNumber iRe.Open iSql, iDb, adOpenKeyset, adLockReadOnly '生成数据库恢复语句 iSql = "restore database [" & sDataBaseName & "]" & vbCrLf & _ "from disk='" & sBackUpfileName & "'" & vbCrLf & _ "with file=" & sBackupNumber & vbCrLf With iRe While Not .EOF iReturn = iRe("PhysicalName") iI = InStrRev(iReturn, ".") iReturn = IIf(iI = 0, "", Mid(iReturn, iI)) & "'" iSql = iSql & ",move '" & iRe("LogicalName") & _ "' to '" & sDataBasePath & sDataBaseName & iReturn & vbCrLf .MoveNext Wend .Close End With iSql = iSql & IIf(sReplaceExist, ",replace", "") iDb.Execute iSql iReturn = "" GoTo lbExit lbErr: iReturn = Error lbExit: fRestoreDatabase_a = iReturn End Function
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