纯编码实现数据库的建立或压缩 -pc6资讯

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纯编码实现数据库的建立或压缩 时间：2004/11/7 3:02:00来源：本站整理作者：蓝点我要评论(0): <%

'#######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

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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