VB实现SQL Server数据库备份/恢复----from http://blog.csdn.net/zjcxc/

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

'**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 db" & 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