純編碼實現Access數據庫的建立或壓縮

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'#######以下是一個類文件，下面的注解是調用類的方法##################################
'# 注意：如果系統不支持建立Scripting.FileSystemObject對象，那么數據庫壓縮功能將無法使用
'# Access 數據庫類
'# CreateDbFile 建立一個Access 數據庫文件
'# CompactDatabase 壓縮一個Access 數據庫文件
'# 建立對象方法:
'# Set a = New DatabaseTools
'# by (蕭寒雪) s.f.
'##################################

Class DatabaseTools

Public function CreateDBfile(byVal dbFileName,byVal DbVer,byVal SavePath)
'建立數據庫文件
'If DbVer is 0 Then Create Access97 dbFile
'If DbVer is 1 Then Create Access2000 dbFile
On error resume Next
If Right(SavePath,1)<>"\" Or Right(SavePath,1)<>"/" Then SavePath = Trim(SavePath) & "\"
If Left(dbFileName,1)="\" Or Left(dbFileName,1)="/" Then dbFileName = Trim(Mid(dbFileName,2,Len(dbFileName)))
If DbExists(SavePath & dbFileName) Then
Response.Write ("對不起，該數據庫已經存在!")
CreateDBfile = False
Else
Dim Ca
Set Ca = Server.CreateObject("ADOX.Catalog")
If Err.number<>0 Then
Response.Write ("無法建立，請檢查錯誤信息<br>" & Err.number & "<br>" & Err.Description)
Err.Clear
Exit function
End If
If DbVer=0 Then
call Ca.Create("Provider=Microsoft.Jet.OLEDB.3.51;Data Source=" & SavePath & dbFileName)
Else
call Ca.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & SavePath & dbFileName)
End If
Set Ca = Nothing
CreateDBfile = True
End If
End function

Public function CompactDatabase(byVal dbFileName,byVal DbVer,byVal SavePath)
'壓縮數據庫文件
'0 為access 97
'1 為access 2000
On Error resume next
If Right(SavePath,1)<>"\" Or Right(SavePath,1)<>"/" Then SavePath = Trim(SavePath) & "\"
If Left(dbFileName,1)="\" Or Left(dbFileName,1)="/" Then dbFileName = Trim(Mid(dbFileName,2,Len(dbFileName)))
If DbExists(SavePath & dbFileName) Then
Response.Write ("對不起，該數據庫已經存在!")
CompactDatabase = False
Else
Dim Cd
Set Cd =Server.CreateObject("JRO.JetEngine")
If Err.number<>0 Then
Response.Write ("無法壓縮，請檢查錯誤信息<br>" & Err.number & "<br>" & Err.Description)
Err.Clear
Exit function
End If
If DbVer=0 Then
call Cd.CompactDatabase("Provider=Microsoft.Jet.OLEDB.3.51;Data Source=" & SavePath & dbFileName,"Provider=Microsoft.Jet.OLEDB.3.51;Data
Source=" & SavePath & dbFileName & ".bak.mdb;Jet OLEDB;Encrypt Database=True")
Else
call Cd.CompactDatabase("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" &
SavePath & dbFileName,"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" &
SavePath & dbFileName & ".bak.mdb;Jet OLEDB;Encrypt Database=True")
End If
'刪除舊的數據庫文件
call DeleteFile(SavePath & dbFileName)
'將壓縮后的數據庫文件還原
call RenameFile(SavePath & dbFileName & ".bak.mdb",SavePath & dbFileName)
Set Cd = False
CompactDatabase = True
End If
end function

Public function DbExists(byVal dbPath)
'查找數據庫文件是否存在
On Error resume Next
Dim c
Set c = Server.CreateObject("ADODB.Connection")
c.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & dbPath
If Err.number<>0 Then
Err.Clear
DbExists = false
else
DbExists = True
End If
set c = nothing
End function

Public function AppPath()
'取當前真實路徑
AppPath = Server.MapPath("./")
End function

Public function AppName()
'取當前程序名稱
AppName = Mid(Request.ServerVariables("SCRIPT_NAME"),(InStrRev(Request.ServerVariables("SCRIPT_NAME") ,"/",-1,1))+1,Len(Request.ServerVariables("SCRIPT_NAME")))
End Function

Public function DeleteFile(filespec)
'刪除一個文件
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
If Err.number<>0 Then
Response.Write("刪除文件發生錯誤!請查看錯誤信息<br>" & Err.number & "<br>" & Err.Description)
Err.Clear
DeleteFile = False
End If
call fso.DeleteFile(filespec)
Set fso = Nothing
DeleteFile = True
End function

Public function RenameFile(filespec1,filespec2)
'修改一個文件
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
If Err.number<>0 Then
Response.Write("修改文件名時發生錯誤!請查看錯誤信息<br>" & Err.number & "<br>" & Err.Description)
Err.Clear
RenameFile = False
End If
call fso.CopyFile(filespec1,filespec2,True)
call fso.DeleteFile(filespec1)
Set fso = Nothing
RenameFile = True
End function

End Class
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