主题:  如何插入新记录及更新记录中的数据?

数码狂人

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#12001/11/19 20:43:05
本人初学ASP,现已可以读出ODBC数据库中的任意数据,但不会写及更新数据,请高手给出简单例子,以供学习。谢!

编辑历史:[这消息被数码狂人编辑过(编辑时间2001-11-19 20:44:26)]


5D荣誉斑竹

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#22001/11/19 23:17:39
请看下面的两个例子,可以实现对数据库的插入和更新、删除:
1、insert.asp
<%@LANGUAGE="VBSCRIPT"%>
<%
' *** Logout the current user.
MM_Logout = CStr(Request.ServerVariables("URL")) & "?MM_Logoutnow=1"
If (CStr(Request("MM_Logoutnow")) = "1") Then
Session.Abandon
MM_logoutRedirectPage = "../index.asp"
' redirect with URL parameters (remove the "MM_Logoutnow" query param).
if (MM_logoutRedirectPage = "") Then MM_logoutRedirectPage = CStr(Request.ServerVariables("URL"))
If (InStr(1, UC_redirectPage, "?", vbTextCompare) = 0 And Request.QueryString <> "") Then
MM_newQS = "?"
For Each Item In Request.QueryString
If (Item <> "MM_Logoutnow") Then
If (Len(MM_newQS) > 1) Then MM_newQS = MM_newQS & "&"
MM_newQS = MM_newQS & Item & "=" & Server.URLencode(Request.QueryString(Item))
End If
Next
if (Len(MM_newQS) > 1) Then MM_logoutRedirectPage = MM_logoutRedirectPage & MM_newQS
End If
Response.Redirect(MM_logoutRedirectPage)
End If
%>
<%
' *** Restrict Access To Page: Grant or deny access to this page
MM_authorizedUsers="admin"
MM_authFailedURL="index.asp"
MM_grantAccess=false
If Session("MM_Username") <> "" Then
If (false Or CStr(Session("MM_UserAuthorization"))="") Or _
(InStr(1,MM_authorizedUsers,Session("MM_UserAuthorization"))>=1) Then
MM_grantAccess = true
End If
End If
If Not MM_grantAccess Then
MM_qsChar = "?"
If (InStr(1,MM_authFailedURL,"?") >= 1) Then MM_qsChar = "&"
MM_referrer = Request.ServerVariables("URL")
if (Len(Request.QueryString()) > 0) Then MM_referrer = MM_referrer & "?" & Request.QueryString()
MM_authFailedURL = MM_authFailedURL & MM_qsChar & "accessdenied=" & Server.URLEncode(MM_referrer)
Response.Redirect(MM_authFailedURL)
End If
%>

<%
' *** Edit Operations: declare variables

MM_editAction = CStr(Request("URL"))
If (Request.QueryString <> "") Then
MM_editAction = MM_editAction & "?" & Request.QueryString
End If

' boolean to abort record edit
MM_abortEdit = false

' query string to execute
MM_editQuery = ""
%>
<%
' *** Insert Record: set variables

If (CStr(Request("MM_insert")) <> "") Then

MM_editConnection = MM_wincheer_STRING
MM_editTable = "content"
MM_editRedirectUrl = "admin.asp"
MM_fieldsStr = "type|value|addtime|value|title|value|author|value|content|value|keyword|value"
MM_columnsStr = "type|',none,''|addtime|',none,''|title|',none,''|author|',none,''|content|',none,''|keyword|',none,''"

' create the MM_fields and MM_columns arrays
MM_fields = Split(MM_fieldsStr, "|")
MM_columns = Split(MM_columnsStr, "|")

' set the form values
For i = LBound(MM_fields) To UBound(MM_fields) Step 2
MM_fields(i+1) = CStr(Request.Form(MM_fields(i)))
Next

' append the query string to the redirect URL
If (MM_editRedirectUrl <> "" And Request.QueryString <> "") Then
If (InStr(1, MM_editRedirectUrl, "?", vbTextCompare) = 0 And Request.QueryString <> "") Then
MM_editRedirectUrl = MM_editRedirectUrl & "?" & Request.QueryString
Else
MM_editRedirectUrl = MM_editRedirectUrl & "&" & Request.QueryString
End If
End If

End If
%>
<%
' *** Insert Record: construct a sql insert statement and execute it

If (CStr(Request("MM_insert")) <> "") Then

' create the sql insert statement
MM_tablevalues = ""
MM_dbvalues = ""
For i = LBound(MM_fields) To UBound(MM_fields) Step 2
FormVal = MM_fields(i+1)
MM_typeArray = Split(MM_columns(i+1),",")
Delim = MM_typeArray(0)
If (Delim = "none") Then Delim = ""
AltVal = MM_typeArray(1)
If (AltVal = "none") Then AltVal = ""
EmptyVal = MM_typeArray(2)
If (EmptyVal = "none") Then EmptyVal = ""
If (FormVal = "") Then
FormVal = EmptyVal
Else
If (AltVal <> "") Then
FormVal = AltVal
ElseIf (Delim = "'") Then ' escape quotes
FormVal = "'" & Replace(FormVal,"'","''") & "'"
Else
FormVal = Delim + FormVal + Delim
End If
End If
If (i <> LBound(MM_fields)) Then
MM_tablevalues = MM_tablevalues & ","
MM_dbvalues = MM_dbvalues & ","
End if
MM_tablevalues = MM_tablevalues & MM_columns(i)
MM_dbvalues = MM_dbvalues & FormVal
Next
MM_editQuery = "insert into " & MM_editTable & " (" & MM_tablevalues & ") values (" & MM_dbvalues & ")"

If (Not MM_abortEdit) Then
' execute the insert
Set MM_editCmd = Server.CreateObject("ADODB.Command")
MM_editCmd.ActiveConnection = MM_editConnection
MM_editCmd.CommandText = MM_editQuery
MM_editCmd.Execute
MM_editCmd.ActiveConnection.Close

If (MM_editRedirectUrl <> "") Then
Response.Redirect(MM_editRedirectUrl)
End If
End If

End If
%>


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2、edit.asp
<%@LANGUAGE="VBSCRIPT"%>
<%
' *** Logout the current user.
MM_Logout = CStr(Request.ServerVariables("URL")) & "?MM_Logoutnow=1"
If (CStr(Request("MM_Logoutnow")) = "1") Then
Session.Abandon
MM_logoutRedirectPage = ""
' redirect with URL parameters (remove the "MM_Logoutnow" query param).
if (MM_logoutRedirectPage = "") Then MM_logoutRedirectPage = CStr(Request.ServerVariables("URL"))
If (InStr(1, UC_redirectPage, "?", vbTextCompare) = 0 And Request.QueryString <> "") Then
MM_newQS = "?"
For Each Item In Request.QueryString
If (Item <> "MM_Logoutnow") Then
If (Len(MM_newQS) > 1) Then MM_newQS = MM_newQS & "&"
MM_newQS = MM_newQS & Item & "=" & Server.URLencode(Request.QueryString(Item))
End If
Next
if (Len(MM_newQS) > 1) Then MM_logoutRedirectPage = MM_logoutRedirectPage & MM_newQS
End If
Response.Redirect(MM_logoutRedirectPage)
End If
%>

<%
' *** Restrict Access To Page: Grant or deny access to this page
MM_authorizedUsers="admin"
MM_authFailedURL="../index.asp"
MM_grantAccess=false
If Session("MM_Username") <> "" Then
If (false Or CStr(Session("MM_UserAuthorization"))="") Or _
(InStr(1,MM_authorizedUsers,Session("MM_UserAuthorization"))>=1) Then
MM_grantAccess = true
End If
End If
If Not MM_grantAccess Then
MM_qsChar = "?"
If (InStr(1,MM_authFailedURL,"?") >= 1) Then MM_qsChar = "&"
MM_referrer = Request.ServerVariables("URL")
if (Len(Request.QueryString()) > 0) Then MM_referrer = MM_referrer & "?" & Request.QueryString()
MM_authFailedURL = MM_authFailedURL & MM_qsChar & "accessdenied=" & Server.URLEncode(MM_referrer)
Response.Redirect(MM_authFailedURL)
End If
%>
<%
set upd = Server.CreateObject("ADODB.Recordset")
upd.ActiveConnection = MM_wincheer_STRING
upd.Source = "SELECT addtime, author, content, id_content, keyword, title, type FROM content"
upd.CursorType = 0
upd.CursorLocation = 2
upd.LockType = 3
upd.Open()
upd_numRows = 0
%>
<%
' *** Recordset Stats, Move To Record, and Go To Record: declare stats variables

' set the record count
upd_total = upd.RecordCount

' set the number of rows displayed on this page
If (upd_numRows < 0) Then
upd_numRows = upd_total
Elseif (upd_numRows = 0) Then
upd_numRows = 1
End If

' set the first and last displayed record
upd_first = 1
upd_last = upd_first + upd_numRows - 1

' if we have the correct record count, check the other stats
If (upd_total <> -1) Then
If (upd_first > upd_total) Then upd_first = upd_total
If (upd_last > upd_total) Then upd_last = upd_total
If (upd_numRows > upd_total) Then upd_numRows = upd_total
End If
%>
<%
' *** Move To Record and Go To Record: declare variables

Set MM_rs = upd
MM_rsCount = upd_total
MM_size = upd_numRows
MM_uniqueCol = ""
MM_paramName = ""
MM_offset = 0
MM_atTotal = false
MM_paramIsDefined = false
If (MM_paramName <> "") Then
MM_paramIsDefined = (Request.QueryString(MM_paramName) <> "")
End If
%>
<%
' *** Move To Record: handle 'index' or 'offset' parameter

if (Not MM_paramIsDefined And MM_rsCount <> 0) then

' use index parameter if defined, otherwise use offset parameter
r = Request.QueryString("index")
If r = "" Then r = Request.QueryString("offset")
If r <> "" Then MM_offset = Int(r)

' if we have a record count, check if we are past the end of the recordset
If (MM_rsCount <> -1) Then
If (MM_offset >= MM_rsCount Or MM_offset = -1) Then ' past end or move last
If ((MM_rsCount Mod MM_size) > 0) Then ' last page not a full repeat region
MM_offset = MM_rsCount - (MM_rsCount Mod MM_size)
Else
MM_offset = MM_rsCount - MM_size
End If
End If
End If

' move the cursor to the selected record
i = 0
While ((Not MM_rs.EOF) And (i < MM_offset Or MM_offset = -1))
MM_rs.MoveNext
i = i + 1
Wend
If (MM_rs.EOF) Then MM_offset = i ' set MM_offset to the last possible record

End If
%>
<%
' *** Move To Record: if we dont know the record count, check the display range

If (MM_rsCount = -1) Then

' walk to the end of the display range for this page
i = MM_offset
While (Not MM_rs.EOF And (MM_size < 0 Or i < MM_offset + MM_size))
MM_rs.MoveNext
i = i + 1
Wend

' if we walked off the end of the recordset, set MM_rsCount and MM_size
If (MM_rs.EOF) Then
MM_rsCount = i
If (MM_size < 0 Or MM_size > MM_rsCount) Then MM_size = MM_rsCount
End If

' if we walked off the end, set the offset based on page size
If (MM_rs.EOF And Not MM_paramIsDefined) Then
If (MM_offset > MM_rsCount - MM_size Or MM_offset = -1) Then
If ((MM_rsCount Mod MM_size) > 0) Then
MM_offset = MM_rsCount - (MM_rsCount Mod MM_size)
Else
MM_offset = MM_rsCount - MM_size
End If
End If
End If

' reset the cursor to the beginning
If (MM_rs.CursorType > 0) Then
MM_rs.MoveFirst
Else
MM_rs.Requery
End If

' move the cursor to the selected record
i = 0
While (Not MM_rs.EOF And i < MM_offset)
MM_rs.MoveNext
i = i + 1
Wend
End If
%>
<%
' *** Move To Record: update recordset stats

' set the first and last displayed record
upd_first = MM_offset + 1
upd_last = MM_offset + MM_size
If (MM_rsCount <> -1) Then
If (upd_first > MM_rsCount) Then upd_first = MM_rsCount
If (upd_last > MM_rsCount) Then upd_last = MM_rsCount
End If

' set the boolean used by hide region to check if we are on the last record
MM_atTotal = (MM_rsCount <> -1 And MM_offset + MM_size >= MM_rsCount)
%>
<%
' *** Go To Record and Move To Record: create strings for maintaining URL and Form parameters

' create the list of parameters which should not be maintained
MM_removeList = "&index="
If (MM_paramName <> "") Then MM_removeList = MM_removeList & "&" & MM_paramName & "="
MM_keepURL="":MM_keepForm="":MM_keepBoth="":MM_keepNone=""

' add the URL parameters to the MM_keepURL string
For Each Item In Request.QueryString
NextItem = "&" & Item & "="
If (InStr(1,MM_removeList,NextItem,1) = 0) Then
MM_keepURL = MM_keepURL & NextItem & Server.URLencode(Request.QueryString(Item))
End If
Next

' add the Form variables to the MM_keepForm string
For Each Item In Request.Form
NextItem = "&" & Item & "="
If (InStr(1,MM_removeList,NextItem,1) = 0) Then
MM_keepForm = MM_keepForm & NextItem & Server.URLencode(Request.Form(Item))
End If
Next

' create the Form + URL string and remove the intial '&' from each of the strings
MM_keepBoth = MM_keepURL & MM_keepForm
if (MM_keepBoth <> "") Then MM_keepBoth = Right(MM_keepBoth, Len(MM_keepBoth) - 1)
if (MM_keepURL <> "") Then MM_keepURL = Right(MM_keepURL, Len(MM_keepURL) - 1)
if (MM_keepForm <> "") Then MM_keepForm = Right(MM_keepForm, Len(MM_keepForm) - 1)

' a utility function used for adding additional parameters to these strings
Function MM_joinChar(firstItem)
If (firstItem <> "") Then
MM_joinChar = "&"
Else
MM_joinChar = ""
End If
End Function
%>
<%
' *** Move To Record: set the strings for the first, last, next, and previous links

MM_keepMove = MM_keepBoth
MM_moveParam = "index"

' if the page has a repeated region, remove 'offset' from the maintained parameters
If (MM_size > 0) Then
MM_moveParam = "offset"
If (MM_keepMove <> "") Then
params = Split(MM_keepMove, "&")
MM_keepMove = ""
For i = 0 To UBound(params)
nextItem = Left(params(i), InStr(params(i),"=") - 1)
If (StrComp(nextItem,MM_moveParam,1) <> 0) Then
MM_keepMove = MM_keepMove & "&" & params(i)
End If
Next
If (MM_keepMove <> "") Then
MM_keepMove = Right(MM_keepMove, Len(MM_keepMove) - 1)
End If
End If
End If

' set the strings for the move to links
If (MM_keepMove <> "") Then MM_keepMove = MM_keepMove & "&"
urlStr = "edit.asp?offset="
MM_moveFirst = urlStr & "0"
MM_moveLast = urlStr & "-1"
MM_moveNext = urlStr & Cstr(MM_offset + MM_size)
prev = MM_offset - MM_size
If (prev < 0) Then prev = 0
MM_movePrev = urlStr & Cstr(prev)
%>
<%
if request.form("doit")="editdate" and request.form("edit")<>"" then    
    MM_rs.find "id_content="&request.form("id_content")
    iwanttodo=request.form("edit")
    select case iwanttodo
        case "upd"
            MM_rs("type")=request.form("type")
            MM_rs("title")=request.form("title")
            MM_rs("author")=request.form("author")
            MM_rs("addtime")=request.form("addtime")
            MM_rs("keyword")=request.form("keyword")
            MM_rs("content")=request.form("content")
            MM_rs.update
        case "del"
            MM_rs.delete
            MM_rs.movefirst
    end select
end if
%>


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Id_content:
" size="32">
Type:
" size="32">

Title:
" size="32">
Author:
" size="32">
Addtime:
">
Keyword:
" size="32">
Content:

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<% If MM_offset <> 0 Then %>
第一条
<% End If ' end MM_offset <> 0 %>

<% If MM_offset <> 0 Then %>
上一条
<% End If ' end MM_offset <> 0 %>

<% If Not MM_atTotal Then %>
下一条
<% End If ' end Not MM_atTotal %>

<% If Not MM_atTotal Then %>
最后一条
<% End If ' end Not MM_atTotal %>



<%
upd.Close()
%>
上面的例子是用ud制作的,并且加入了部分手工代码。其中
MM_wincheer_STRING = "provider=microsoft.jet.oledb.4.0;data source="&server.mappath("/mydata/data.mdb")

编辑历史:[这消息被wincheer编辑过(编辑时间2001-11-19 23:18:51)]