ASP编程：一个通俗的数据库例子源源法式

源代码保护方面其实现在考虑得没那么多了..NET也可以反编译.ASP写得复杂的话别人能看得懂的话.他也有能力自己写了.这方面担心的倒不太多. 纵观现在网上可以下载的那些所谓BBS还有什么网站等等的源代码    To assist in interfacing with databases. This script can format variables and return SQL formats.
Such as double quoting apposterphies and surrounding strings with quotes, Returning NULL for invalid data
types, trimming strings so they do not exceed maximum lengths. This also has some functions so that you
can open and close databases more conveiently with just one line of code. You can query a database and get
an Array as well with some code.


  
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    '**************************************
    ' for :Common Database Routines
    '**************************************
    Copyright (c) 1999 by Lewis Moten, All rights reserved.


code:
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    '**************************************
    ' Name: Common Database Routines
    ' Description:To assist in interfacing w
    '     ith databases. This script can format va
    '     riables and return SQL formats. Such as
    '     double quoting apposterphies and surroun
    '     ding strings with quotes, Returning NULL
    '     for invalid data types, trimming strings
    '     so they do not exceed maximum lengths. T
    '     his also has some functions so that you
    '     can open and close databases more convei
    '     ently with just one line of code. You ca
    '     n query a database and get an Array as w
    '     ell with some code.
    ' By: Lewis Moten
    '
    '
    ' Inputs:None
    '
    ' Returns:None
    '
    'Assumes:This script assumes that you at
    '     least have Microsoft ActiveX Data Object
    '     s 2.0 or Higher (ADODB). This script may
    '     get some getting used to at first until
    '     you go through and study what each routi
    '     ne can do.
    '
    'Side Effects:None
    '
    'Warranty:
    'code provided by Planet Source Code(tm)
    '     (www.Planet-Source-Code.com) 'as is', wi
    '     thout warranties as to performance, fitn
    '     ess, merchantability,and any other warra
    '     nty (whether expressed or implied).
    'Terms of Agreement:
    'By using this source code, you agree to
    '     the following terms...
    ' 1) You may use this source code in per
    '     sonal projects and may compile it into a
    '     n .exe/.dll/.ocx and distribute it in bi
    '     nary format freely and with no charge.
    ' 2) You MAY NOT redistribute this sourc
    '     e code (for example to a web site) witho
    '     ut written permission from the original
    '     author.Failure to do so is a violation o
    '     f copyright laws.
    ' 3) You may link to this code from anot
    '     her website, provided it is not wrapped
    '     in a frame.
    ' 4) The author of this code may have re
    '     tained certain additional copyright righ
    '     ts.If so, this is indicated in the autho
    '     r's description.
    '**************************************
   
    <!--METADATA Type="TypeLib" NAME="Microsoft ActiveX Data Objects 2.0 Library" UUID="{00000200-0000-
0010-8000-00AA006D2EA4}" VERSION="2.0"-->
    <%
    ' Setup the ConnectionString
    Dim sCONNECTION_STRING
    sCONNECTION_STRING = "DRIVER=Microsoft Access Driver
(*.mdb);DBQ=D:\inetpub\wwwroot\inc\data\database.mdb;"
    Dim oConn
    '---------------------------------------
    '     ----------------------------------------
    '     
    Function DBConnOpen(ByRef aoConnObj)
     ' This routine connects To a database and returns
     ' weather or Not it was successful
     ' Prepare For any errors that may occur While connecting To the database
     On Error Resume Next
     ' Create a connection object
     Set aoConnObj = Server.CreateObject("ADODB.Connection")
     ' Open a connection To the database
     Call aoConnObj.Open(sCONNECTION_STRING)
     ' If any errors have occured
     If Err Then
     ' Clear errors
     Err.Clear
     ' Release connection object
     Set aoConnObj = Nothing
     ' Return unsuccessful results
     DBConnOpen = False
     ' Else errors did Not occur
     Else
     ' Return successful results
     DBConnOpen = True
     End If ' Err
    End Function ' DBConnOpen
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function DBConnClose(ByRef aoConnObj)
     ' This routine closes the database connection and releases objects
     ' from memory
     ' If the connection variable has been defined as an object
     If IsObject(aoConnObj) Then
     ' If the connection is open
     If aoConnObj.State = adStateOpen Then
     ' Close the connection
     aoConnObj.Close
     ' Return positive Results
     DBConnClose = True
     End If ' aoConnObj.State = adStateOpen
     ' Release connection object
     Set aoConnObj = Nothing
     End If ' IsObject(aoConnObj)
    End Function ' DBConnClose
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SetData(ByRef asSQL, ByRef avDataAry)
     ' This routine acquires data from the database
     Dim loRS ' ADODB.Recordset Object
     ' Create Recordset Object
     Set loRS = Server.CreateObject("ADODB.Recordset")
     ' Prepare For errors when opening database connection
     On Error Resume Next
     ' If a connection object has been defined
     If IsObject(oConn) Then
     ' If the connection is open
     If oConn.State = adStateOpen Then
     ' Acquire data With connection object
     Call loRS.Open(asSQL, oConn, adOpenForwardOnly, adLockReadOnly)
     ' Else the connection is closed
     Else
     ' Set the ConnectionString
     Call SetConnectionString(csConnectionString)
     ' If atempt To open connection succeeded
     If DBConnOpen() Then
     ' Acquire data With connection object
     Call loRS.Open(asSQL, oConn, adOpenForwardOnly, adLockReadOnly)
     ' Return connection object To closed state
     Call DBConnClose()
     End If ' DBConnOpen()
     End If ' aoConn.State = adStateOpen
     ' Else active connection is the ConnectionString
     Else
     ' Acquire data With ConnectionString
     Call loRS.Open(asSQL, sCONNECTION_STRING, adOpenForwardOnly, adLockReadOnly)
     End If ' IsObject(oConn)
     ' If errors occured
     If Err Then
     response.write "<HR color=red>" & err.description & "<HR color=red>" & asSQL & "<HR
color=red>"
     ' Clear the Error
     Err.Clear
     ' If the recorset is open
     If loRS.State = adStateOpen Then
     ' Close the recorset
     loRS.Close
     End If ' loRS.State = adStateOpen
     ' Release Recordset from memory
     Set loRS = Nothing
     ' Return negative results
     SetData = False
     ' Exit Routine
     Exit Function
     End If ' Err
     ' Return positve results
     SetData = True
     ' If data was found
     If Not loRS.EOF Then
     ' Pull data into an array
     avDataAry = loRS.GetRows
     End If ' Not loRS.EOF
     ' Close Recordset
     loRS.Close
     ' Release object from memory
     Set loRS = Nothing
    End Function ' SetData
    '---------------------------------------
    '     ----------------------------------------
    '     
    ' SQL Preperations are used to prepare v
    '     ariables for SQL Queries. If
    ' invalid data is passed to these routin
    '     es, NULL values or Default Data
    ' is returned to keep your SQL Queries f
    '     rom breaking from users breaking
    ' datatype rules.
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SQLPrep_s(ByVal asExpression, ByRef anMaxLength)
     ' If maximum length is defined
     If anMaxLength > 0 Then
     ' Trim expression To maximum length
     asExpression = Left(asExpression, anMaxLength)
     End If ' anMaxLength > 0
     ' Double quote SQL quote characters
     asExpression = WordStr(asExpression, "'", "''")
     ' If Expression is Empty
     If asExpression = "" Then
     ' Return a NULL value
     SQLPrep_s = "NULL"
     ' Else expression is Not empty
     Else
     ' Return quoted expression
     SQLPrep_s = "'" & asExpression & "'"
     End If ' asExpression
    End Function ' SQLPrep_s
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SQLPrep_n(ByVal anExpression)
     ' If expression numeric
     If IsNumeric(anExpression) And Not anExpression = "" Then
     ' Return number
     SQLPrep_n = anExpression
     ' Else expression Not numeric
     Else
     ' Return NULL
     SQLPrep_n = "NULL"
     End If ' IsNumeric(anExpression) And Not anExpression = ""
    End Function ' SQLPrep_n
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SQLPrep_b(ByVal abExpression, ByRef abDefault)
     ' Declare Database Constants
     Const lbTRUE = -1 '1 = SQL, -1 = Access
     Const lbFALSE = 0
     Dim lbResult ' Result To be passed back
     ' Prepare For any errors that may occur
     On Error Resume Next
     ' If expression Not provided
     If abExpression = "" Then
     ' Set expression To default value
     abExpression = abDefault
     End If ' abExpression = ""
     ' Attempt To convert expression
     lbResult = CBool(abExpression)
     ' If Err Occured
     If Err Then
     ' Clear the Error
     Err.Clear
     ' Determine action based on Expression
     Select Case LCase(abExpression)
     ' True expressions
     Case "yes", "on", "true", "-1", "1"
     lbResult = True
     ' False expressions
     Case "no", "off", "false", "0"
     lbResult = False
     ' Unknown expression
     Case Else
     lbResult = abDefault
     End Select ' LCase(abExpression)
     End If ' Err
     ' If result is True
     If lbResult Then
     ' Return True
     SQLPrep_b = lbTRUE
     ' Else Result is False
     Else
     ' Return False
     SQLPrep_b = lbFALSE
     End If ' lbResult
    End Function ' SQLPrep_b
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SQLPrep_d(ByRef adExpression)
     ' If Expression valid Date
     If IsDate(adExpression) Then
     ' Return Date
     'SQLPrep_d = "'" & adExpression & "'" ' SQL Database
     SQLPrep_d = "#" & adExpression & "#" ' Access Database
     ' Else Expression Not valid Date
     Else
     ' Return NULL
     SQLPrep_d = "NULL"
     End If ' IsDate(adExpression)
    End Function ' SQLPrep_d
    '---------------------------------------
    '     ----------------------------------------
    '     
    Public Function SQLPrep_c(ByVal acExpression)
     ' If Empty Expression
     If acExpression = "" Then
     ' Return Null
     SQLPrep_c = "NULL"
     ' Else expression has content
     Else
     ' Prepare For Errors
     On Error Resume Next
     ' Attempt To convert expression to Currency
     SQLPRep_c = CCur(acExpression)
     ' If Error occured
     If Err Then
     ' Clear Error
     Err.Clear
     SQLPrep_c = "NULL"
     End If ' Err
     End If ' acExpression = ""
    End Function ' SQLPrep_c
    '---------------------------------------
    '     ----------------------------------------
    '     
    Function buildJoinStatment(sTable,sFldLstAry,rs,conn)
    Dim i,sSql,sTablesAry,sJnFldsAry,bJoinAry,sJoinDisplay
    ReDim sTablesAry(UBound(sFldLstAry))
    ReDim sJnFldsAry(UBound(sFldLstAry))
    ReDim bJoinAry(UBound(sFldLstAry))
    For i = 0 To UBound(sFldLstAry)
    sSql = "SELECT OBJECT_NAME(rkeyid),COL_NAME(rkeyid,rkey1)"
    sSql = sSql &" FROM sysreferences"
    sSql = sSql &" WHERE fkeyid = OBJECT_ID('"& sTable &"') "
    sSql = sSql &" AND col_name(fkeyid,fkey1) = '"& Trim(sFldLstAry(i)) &"'"
    rs.open sSql,conn
    If Not rs.eof Then
    sTablesAry(i) = rs(0)
    sJnFldsAry(i) = rs(1)
    End If
    rs.close
    Next
    If UBound(sFldLstAry) >= 0 Then
    For i = 0 To UBound(sFldLstAry)
    If sTablesAry(i) <> "" Then
    bJoinAry(i) = True
    Else
    bJoinAry(i) = False
    End If
    If i <> UBound(sFldLstAry) Then sSql = sSql &" +' - '+ "
    Next
    sSql = "FROM "& sTable
    For i = 0 To UBound(sFldLstAry)
    If bJoinAry(i) Then sSql = sSql &" LEFT JOIN "& sTablesAry(i) &" ON "& sTable &"."& sFldLstAry(i) &"
= "& sTablesAry(i) &"."& sJnFldsAry(i)
    Next
    End If
    buildJoinStatment = sSql
    End Function
    '---------------------------------------
    '     ----------------------------------------
    '     
    Function buildQuery(ByRef asFieldAry, ByVal asKeyWords)
     ' To find fields that may have a word in them
     ' OR roger
     ' | roger
     ' roger
     ' To find fields that must match a word
     ' AND roger
     ' + roger
     ' & roger
     ' To find fields that must Not match a word
     ' Not roger
     ' - roger
     ' Also use phrases
     ' +"rogers dog" -cat
     ' +(rogers dog)
     Dim loRegExp
     Dim loRequiredWords
     Dim loUnwantedWords
     Dim loOptionalWords
     Dim lsSQL
     Dim lnIndex
     Dim lsKeyword
     Set loRegExp = New RegExp
     loRegExp.Global = True
     loRegExp.IgnoreCase = True
     loRegExp.Pattern = "((AND|[+&])\s*[\(\[\{""].*[\)\]\}""])|((AND\s|[+&])\s*\b[-\w']+\b)"
     Set loRequiredWords = loRegExp.Execute(asKeywords)
     asKeywords = loRegExp.WordStr(asKeywords, "")
     loRegExp.Pattern = "(((NOT|[-])\s*)?[\(\[\{""].*[\)\]\}""])|(((NOT\s+|[-])\s*)\b[-\w']+\b)"
     Set loUnwantedWords = loRegExp.Execute(asKeywords)
     asKeywords = loRegExp.WordStr(asKeywords, "")
     loRegExp.Pattern = "(((OR|[|])\s*)?[\(\[\{""].*[\)\]\}""])|(((OR\s+|[|])\s*)?\b[-\w']+\b)"
     Set loOptionalWords = loRegExp.Execute(asKeywords)
     asKeywords = loRegExp.WordStr(asKeywords, "")
     If Not loRequiredWords.Count = 0 Then
     ' REQUIRED
     lsSQL = lsSQL & "("
     For lnIndex = 0 To loRequiredWords.Count - 1
     lsKeyword = loRequiredWords.Item(lnIndex).Value
     loRegExp.Pattern = "^(AND|[+&])\s*"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     loRegExp.Pattern = "[()""\[\]{}]"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     lsKeyword = WordStr(lsKeyword, "'", "''")
     If Not lnIndex = 0 Then
     lsSQL = lsSQL & " AND "
       End If
     lsSQL = lsSQL & "(" & Join(asFieldAry, " LIKE '%" & lsKeyword & "%' OR ")
& " LIKE '%" & lsKeyword & "%')"
     Next
     lsSQL = lsSQL & ")"
     End If
     If Not loOptionalWords.Count = 0 Then
     ' OPTIONAL
     If lsSQL = "" Then
     lsSQL = lsSQL & "("
     Else
     lsSQL = lsSQL & " AND ("
     End If
     For lnIndex = 0 To loOptionalWords.Count - 1
     lsKeyword = loOptionalWords.Item(lnIndex).Value
     loRegExp.Pattern = "^(OR|[|])\s*"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     loRegExp.Pattern = "[()""\[\]{}]"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     lsKeyword = WordStr(lsKeyword, "'", "''")
     If Not lnIndex = 0 Then
     lsSQL = lsSQL & " OR "
     End If
     lsSQL = lsSQL & "(" & Join(asFieldAry, " LIKE '%" & lsKeyword & "%' OR ")
& " LIKE '%" & lsKeyword & "%')"
     Next
     lsSQL = lsSQL & ")"
     End If
     If Not loUnwantedWords.Count = 0 Then
     ' UNWANTED
     If lsSQL = "" Then
     lsSQL = lsSQL & "NOT ("
     Else
     lsSQL = lsSQL & " AND Not ("
     End If
     For lnIndex = 0 To loUnwantedWords.Count - 1
     lsKeyword = loUnWantedWords.Item(lnIndex).Value
     loRegExp.Pattern = "^(NOT|[-])\s*"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     loRegExp.Pattern = "[()""\[\]{}]"
     lsKeyword = loRegExp.WordStr(lsKeyword, "")
     lsKeyword = WordStr(lsKeyword, "'", "''")
     If Not lnIndex = 0 Then
     lsSQL = lsSQL & " OR "
     End If
     lsSQL = lsSQL & "(" & Join(asFieldAry, " LIKE '%" & lsKeyword & "%' OR ")
& " LIKE '%" & lsKeyword & "%')"
     Next
     lsSQL = lsSQL & ")"
     End If
     If Not lsSQL = "" Then lsSQL = "(" & lsSQL & ")"
     buildQuery = lsSQL
    End Function
    '---------------------------------------
    '     ----------------------------------------
    '     
    %>
在实现ERP等高端的ASP应用时，用户需要提供核心的经营资料，需要ASP商有很高的信用度。楼上说交互性不好，太牵强了吧。在微软提供的一套框架中，利用asp做网站，开发效率高，使用人数少，减少不必要的开销。交互性是互动方式，是有开发人员决定的。

代码逻辑混乱，难于管理：由于ASP是脚本语言混合html编程，所以你很难看清代码的逻辑关系，并且随着程序的复杂性增加，使得代码的管理十分困难，甚至超出一个程序员所能达到的管理能力，从而造成出错或这样那样的问题。

如何更好的使自己的东西看上去很不错等等。其实这些都不是问题的实质，我们可以在实践中不断提升自己，不断充实自己。

运用ASP可将VBscript、javascript等脚本语言嵌入到HTML中，便可快速完成网站的应用程序，无需编译，可在服务器端直接执行。容易编写，使用普通的文本编辑器编写，如记事本就可以完成。由脚本在服务器上而不是客户端运行，ASP所使用的脚本语言都在服务端上运行。

Server:这个表示的服务器，操作服务器的一些东西使用这个，如Server.Mappath转换服务器路径,Server.CreateObject实例化一个组件

哪些内置对象是可以跳过的，或者哪些属性和方法是用不到的?

那么，ASP.Net有哪些改进呢？

我可以结合自己的经验大致给你说一说，希望对你有所帮助，少走些弯路。

学习ASP其实应该上升到如何学习程序设计这种境界，其实学习程序设计又是接受一种编程思想。比如ASP如何学习，你也许在以前的学习中碰到过。以下我仔细给你说几点:

ASP.Net和ASP的最大区别在于编程思维的转换，而不仅仅在于功能的增强。ASP使用VBS/JS这样的脚本语言混合html来编程，而那些脚本语言属于弱类型、面向结构的编程语言，而非面向对象，这就明显产生以下几个问题：

仓酷云

我就感觉到ASP和一些常用的数据库编程以及软件工程方面的思想是非常重要的。我现在也在尝试自己做网页，这其中就用到了ASP，我想它的作用是可想而知的。

ASP的语言不仅仅只是命令格式差不多，而是包含在<%%>之内的命令完全就是VB语法。虽然ASP也是做为单独的一个技术来提出的，但他就是完全继承了VB所有的功能。

我认为比较好的方法是找一些比较经典的例子，每个例子比较集中一种编程思想而设计的。

没有坚实的理论做基础，那么我们连踏入社会第一步的资本都没有，特别对于计算机专业的学生学好专业知识是置关重要的。在这里我侧重讲一下如何学习ASP，从平时的学习过程中。

哪些内置对象是可以跳过的，或者哪些属性和方法是用不到的?

我就感觉到ASP和一些常用的数据库编程以及软件工程方面的思想是非常重要的。我现在也在尝试自己做网页，这其中就用到了ASP，我想它的作用是可想而知的。

兴趣爱好，那么你无须学编程，申请一个域名和空间，在网上下载一些免费开源的CMS系统，你不用改代码，只须熟悉它们的后台操作，像office一样简单方便，很快就能建一个站点，很多站长都是这样做的

我想问如何掌握学习节奏(先学什么再学什么)最好详细点?

哪些内置对象是可以跳过的，或者哪些属性和方法是用不到的?

另外因为asp需要使用组件，所以了解一点组件的知识(ADODB也是组件)