ajax之post数据提交
1/17/2014 12:18:57 AM
--------------------案例1---------------------------------
Javascript
var Ajax=function(option){
var request;
var CreateRquest=function(){
var httpRequest;
try{
httpRequest=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
httpRequest=new ActiveXObject("Microsoft.XMLHTTP");
}catch(e1){
httpRequest=new XMLHttpRequest();
}
}
return httpRequest;
}
var SendRequest=function(){
request=CreateRquest();
request.open("post",option.Url,true);
request.onreadystatechange=ResponseRequest;
request.send(option.Param);
}
var ResponseRequest=function(){
if(request.readystate==4){
if(request.status==200){
option.Success(request);
}
else{
option.Failure(request);
}
}
}
SendRequest();
}
var OnBlur=function(el)
{
var option={
Url:"Handler.ashx",
Param:"text=abv",
Success:function(request){
alert(request.responseText);
},
Failure:function(request){
alert(false);
}
};
new Ajax(option);
}
后台代码如下：
Handler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
context.Response.ContentType = "text/plain"
context.Response.Write(context.Request.QueryString.Count)
Dim text As String = context.Request.Form("text")
context.Response.Write(text)
End Sub
测试的时候发现，后台怎么也获取不到前台传来的数据，真是百思不得其解。翻了一下书，都是只说get不说post方法的，然后在百度上狂找资料，真是功夫不负有心人啊，终于找到了，原来要在open方法的后面加上一句话：
var SendRequest=function(){
request=CreateRquest();
request.open("post",option.Url,true);
request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
request.onreadystatechange=ResponseRequest;
request.send(option.Param);
}
OK，事情就这么简单的搞定了，真是踏破铁鞋无觅处，得来全不废功夫啊。
本人具体也没研究过为什么要加上这句话：
request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
来源：cnblogs.com 作者：真的骄傲
--------------------案例2---------------------------------
以下AJAX post 传值
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script language="javascript">
function saveUserInfo()
{
//获取接受返回信息层
var msg = document.getElementById("msg");
//获取表单对象和用户信息值
var f = document.user_info;
var userName = f.user_name.value;
var userAge = f.user_age.value;
var userSex = f.user_sex.value;
//接收表单的URL地址
var url = "/ajax_output.php";
//需要POST的值，把每个变量都通过&来联接
var postStr = "user_name="+ userName +"&user_age="+ userAge +"&user_sex="+ userSex;
//实例化Ajax
//var ajax = InitAjax();
var ajax = false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest) { //Mozilla 浏览器
ajax = new XMLHttpRequest();
if (ajax.overrideMimeType) {//设置MiME类别
ajax.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) { // IE浏览器
try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!ajax) { // 异常，创建对象实例失败
window.alert("不能创建XMLHttpRequest对象实例.");
return false;
}
//通过Post方式打开连接
ajax.open("POST", url, true);
//定义传输的文件HTTP头信息
ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
//发送POST数据
ajax.send(postStr);
//获取执行状态
ajax.onreadystatechange = function() {
//如果执行状态成功，那么就把返回信息写到指定的层里
if (ajax.readyState == 4 && ajax.status == 200) {
msg.innerHTML = ajax.responseText;
}
}
}
</script>
<body >
<div id="msg"></div>
<form name="user_info" method="post" action="">
姓名：<input type="text" name="user_name" /><br />
年龄：<input type="text" name="user_age" /><br />
性别：<input type="text" name="user_sex" /><br />
<input type="button" value="提交表单" onClick="saveUserInfo()">
</form>
</body>
以下是AJAX get传值
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<script language="javascript">
function saveUserInfo()
{
//获取接受返回信息层
var msg = document.getElementById("msg");
//获取表单对象和用户信息值
var f = document.user_info;
var userName = f.user_name.value;
var userAge = f.user_age.value;
var userSex = f.user_sex.value;
//接收表单的URL地址
var url = "/ajax_output.php? user_name="+ userName +"&user_age="+ userAge +"&user_sex="+ userSex";
//实例化Ajax
//var ajax = InitAjax();
var ajax = false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest) { //Mozilla 浏览器
ajax = new XMLHttpRequest();
if (ajax.overrideMimeType) {//设置MiME类别
ajax.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) { // IE浏览器
try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!ajax) { // 异常，创建对象实例失败
window.alert("不能创建XMLHttpRequest对象实例.");
return false;
}
//通过Post方式打开连接
ajax.open("GET", url, true);
//发送GET数据,已经在URL中赋了值所以send那里只要加个空参.
ajax.send(null);
//获取执行状态
ajax.onreadystatechange = function() {
//如果执行状态成功，那么就把返回信息写到指定的层里
if (ajax.readyState == 4 && ajax.status == 200) {
msg.innerHTML = ajax.responseText;
}
}
}
</script>
<body >
<div id="msg"></div>
<form name="user_info" method="post" action="">
姓名：<input type="text" name="user_name" /><br />
年龄：<input type="text" name="user_age" /><br />
性别：<input type="text" name="user_sex" /><br />
<input type="button" value="提交表单" onClick="saveUserInfo()">
</form>
</body>