纯编码实现Access数据库的建立或压缩 |
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| 2003-04-10 |
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纯编码实现Access数据库的建立或压缩!!
<%
'#######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<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)
'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<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
'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<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<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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