利用XMLHTTP無刷新添加數(shù)據(jù)之Post篇.

前兩篇主要寫了從獲取數(shù)據(jù).接下來,我們講講如何添加數(shù)據(jù).
我們傳統(tǒng)的提交數(shù)據(jù)的方法都是用<Form>來實(shí)現(xiàn)的.
<Form>標(biāo)記中的Method屬性確定了表單元素的數(shù)據(jù)在發(fā)送到服務(wù)器時(shí),
如何對(duì)HTTP請(qǐng)求信息進(jìn)行打包.

Method 屬性可以使用的方法
Method屬性 發(fā)送表單元素的方式 讀取數(shù)據(jù)的Request集合
Get 標(biāo)識(shí)在URL的最后 QueryString
Post 在HTTP請(qǐng)求的主體內(nèi)(HTTP請(qǐng)求的自由區(qū)域) Form

這篇文章用XMLHTTP來實(shí)現(xiàn)Form的Method=Post.

ClientPost.htm

<script language="JavaScript">
function AddDataPost(sUserId,sUserName)
{
/*
*--------------- AddDataPost(sUserId,sUserName) -----------------
* AddDataPost(sUserId,sUserName)
* 功能:通過XMLHTTP添加數(shù)據(jù).相當(dāng)于Form的Method=Post.
* 參數(shù):sUserId,字符串,發(fā)送條件.
* 參數(shù):sUserName,字符串,發(fā)送條件.
* 實(shí)例:AddDataPost(document.all.userid.value,document.all.username.value);
* author:wanghr100(灰豆寶寶.net)
* update:2004-5-30 14:46
*--------------- AddDataPost(sUserId,sUserName) -----------------
*/
var oBao = new ActiveXObject("Microsoft.XMLHTTP");
//特殊字符：+,%,&,=,?等的傳輸解決辦法.
//Update:2004-6-1 12:22
//escape(sUserId),escape(sUserName);
sUserId = escape(sUserId);
sUserName = escape(sUserName);
var userInfo = "userid="+sUserId+"&username="+sUserName;
oBao.open("POST","Server.asp",false);
oBao.setRequestHeader("Content-Type","application/x-www-form-urlencoded")
oBao.send(userInfo);
//清空輸入框數(shù)據(jù).
document.all.userid.value="";
document.all.username.value="";
//服務(wù)器端處理返回的是經(jīng)過escape編碼的字符串.
alert(unescape(oBao.responseText))
}
</script>
<input type="button" onclick="AddDataPost(document.all.userid.value,document.all.username.value)" value="AddDataPost"><br>
userid:<input type="text" name="userid"><br>
username:<input type="text" name="username">

Server.asp 服務(wù)器端處理.

<% @Language="JavaScript" %>
<%
function OpenDB(sdbname)
{
/*
*--------------- OpenDB(sdbname) -----------------
* OpenDB(sdbname)
* 功能:打開數(shù)據(jù)庫sdbname,返回conn對(duì)象.
* 參數(shù):sdbname,字符串,數(shù)據(jù)庫名稱.
* 實(shí)例:var conn = OpenDB("database.mdb");
* author:wanghr100(灰豆寶寶.net)
* update:2004-5-12 8:18
*--------------- OpenDB(sdbname) -----------------
*/
var connstr = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath(sdbname);
var conn = Server.CreateObject("ADODB.Connection");
conn.Open(connstr);
return conn;
}
var sResult = "";
var oConn = OpenDB("data.mdb");
//相當(dāng)于Form的Method=Post.
//相當(dāng)于Form的Method=Post.
//特殊字符：+,%,&,=,?等的傳輸解決辦法.客戶端傳輸過來是經(jīng)過escape編碼的.
//所以服用器端應(yīng)該先unescape解碼.
//Update:2004-6-1 12:22
//unescape(Request.Form("userid")).....
var userid = unescape(Request.Form("userid"));
var username = unescape(Request.Form("username"));
sResult = "userid:"+userid+"\nusername:"+username+"\n 添加成功."
var sql = "Insert into users(userid,username)Values('"+userid+"','"+username+"')";
oConn.Execute(sql);
Response.Write(escape(sResult));
%>

數(shù)據(jù)庫設(shè)計(jì)
data.mdb
表users.
字段
id 自動(dòng)編號(hào)
userid 文本
username 文本

表:users 數(shù)據(jù):
id userid username
1 wanghr100 灰豆寶寶.net

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