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纯编码实现Access数据库的建立或压缩
2003:5:20
·来源：网络红尘 karry |
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<%
'#######以下是一个类文件，下面的注解是调用类的方法################################################
'# 注意：如果系统不支持建立Scripting.FileSystemObject对象，那么数据库压缩功能将无法使用
'# Access
数据库类
'# CreateDbFile 建立一个Access 数据库文件
'# CompactDatabase 压缩一个Access
数据库文件
'# 建立对象方法:
'# Set a = New DatabaseTools
'# by (萧寒雪) s.f.
'#########################################################################################
Class DatabaseTools
Public function CreateDBfile(byVal
dbFileName,byVal DbVer,byVal SavePath)
'建立数据库文件
'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 ("对不起，该数据库已经存在!")
CreateDBfile =
False
Else
Dim Ca
Set Ca = Server.CreateObject("ADOX.Catalog")
If Err.number<>0 Then
Response.Write ("无法建立，请检查错误信息
" &
Err.number & "
" & 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)
'压缩数据库文件
'0 为access 97
'1 为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 ("对不起，该数据库已经存在!")
CompactDatabase =
False
Else
Dim Cd
Set Cd =Server.CreateObject("JRO.JetEngine")
If Err.number<>0 Then
Response.Write ("无法压缩，请检查错误信息
" &
Err.number & "
" & 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
'删除旧的数据库文件
call DeleteFile(SavePath &
dbFileName)
'将压缩后的数据库文件还原
call RenameFile(SavePath & dbFileName
& ".bak.mdb",SavePath & dbFileName)
Set Cd = False
CompactDatabase = True
End If
end function
Public
function DbExists(byVal dbPath)
'查找数据库文件是否存在
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()
'取当前真实路径
AppPath =
Server.MapPath("./")
End function
Public function AppName()
'取当前程序名称
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)
'删除一个文件
Dim fso
Set
fso = CreateObject("Scripting.FileSystemObject")
If Err.number<>0
Then
Response.Write("删除文件发生错误!请查看错误信息
" & Err.number & "
"
& Err.Description)
Err.Clear
DeleteFile = False
End If
call fso.DeleteFile(filespec)
Set fso = Nothing
DeleteFile = True
End function
Public function RenameFile(filespec1,filespec2)
'修改一个文件
Dim fso
Set fso =
CreateObject("Scripting.FileSystemObject")
If Err.number<>0 Then
Response.Write("修改文件名时发生错误!请查看错误信息
" & Err.number & "
" &
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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