精华asp代码收集

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
" & 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
%>

现在已可以压缩有密码的数据库，代码如下，但是压缩之后的数据库密码就没有了！如何解决？

<%
Const JET_3X = 4

Function CompactDB(dbPath, boolIs97)
    Dim fso, Engine, strDBPath
    strDBPath = left(dbPath,instrrev(DBPath,"\"))
    Set fso = CreateObject("Scripting.FileSystemObject")

    If fso.FileExists(dbPath) Then    
        Set Engine = CreateObject("JRO.JetEngine")

        If boolIs97 = "True" Then
            Engine.CompactDatabase "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & dbpath, _
            "Provider=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Database Password='XXXXXXXX';Data Source=" & strDBPath & "temp.mdb;" _
            & "Jet OLEDB:Engine Type=" & JET_3X
        Else
        Engine.CompactDatabase "Provider=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Database Password='XXXXXXXX';Data Source=" & dbpath, _
        "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strDBPath & "temp.mdb"
        End If

        fso.CopyFile strDBPath & "temp.mdb",dbpath
        fso.DeleteFile(strDBPath & "temp.mdb")
        Set fso = nothing
        Set Engine = nothing

        CompactDB = "你的数据库, " & dbpath & ", 已经压缩成功!" & vbCrLf

    Else
        CompactDB = "数据库名称或路径不正确. 请重试!" & vbCrLf
    End If

End Function
%>

接着来，希望大家也参与近来
-------------------------------
asp编程有用的例子（二）
17. ASP与SQL数据库连接：

<%@ language=VBs cript%>
<%
dim conn
set conn=server.createobject("ADODB.connection")
con.open "PROVIDER=SQLOLEDB;DATA SOURCE=SQL服务器名称或IP地址;UID=sa;PWD=数据库密码;DATABASE=数据库名称
%>

建立记录集对象：

set rs=server.createobject("adodb.recordset")
rs.open SQL语句,conn,3,2

18. SQL常用命令使用方法：

(1) 数据记录筛选：

sql="select * from 数据表 where 字段名=字段值 order by 字段名 [desc]"

sql="select * from 数据表 where 字段名 like '%字段值%' order by 字段名 [desc]"

sql="select top 10 * from 数据表 where 字段名 order by 字段名 [desc]"

sql="select * from 数据表 where 字段名 in ('值1','值2','值3')"

sql="select * from 数据表 where 字段名 between 值1 and 值2"

(2) 更新数据记录：

sql="update 数据表 set 字段名=字段值 where 条件表达式"

sql="update 数据表 set 字段1=值1,字段2=值2 …… 字段n=值n where 条件表达式"

(3) 删除数据记录：

sql="delete from 数据表 where 条件表达式"

sql="delete from 数据表" (将数据表所有记录删除)

(4) 添加数据记录：

sql="insert into 数据表 (字段1,字段2,字段3 …) valuess (值1,值2,值3 …)"

sql="insert into 目标数据表 select * from 源数据表" (把源数据表的记录添加到目标数据表)

(5) 数据记录统计函数：

AVG(字段名) 得出一个表格栏平均值
COUNT(*

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