Jquery.Form 异步提交表单的简单实例
http://www.vaikan.com/docs/jquery.form.plugin/jquery.form.plugin.html#
1. 在你的页面里写一个表单。一个普通的表单，不需要任何特殊的标记：
代码如下：
<form id="myForm" method="post" action="/Home/AjaxForm"> <div> Name:<input id="username" name="username" type="text" /> Password:<input id="password" name="password" type="text" /> <br /> <input type="submit" value="submit async" id="lnkSubmit" /> </div> </form>
在没有Jquery.Form组件的时候，提交表单，页面会进入阻塞模式，等待服务器端的响应。
2. 引入jQuery和Form Plugin Javascript脚本文件并且添加几句简单的代码让页面在DOM加载完成后初始化表单：
<head>
<script type="text/javascript" src="path/to/jquery.js"></script>
<script type="text/javascript" src="path/to/form.js"></script>
<script type="text/javascript">
// wait for the DOM to be loaded
$(document).ready(function() {
// bind 'myForm' and provide a simple callback function
// 为myform绑定ajaxForm异步提交事件，并提供一个简单的回调函数。
$('#myForm').ajaxForm(function() {
alert("Thank you for your comment!");
});
});
</script>
</head>
加上jquery.form组件后，提交表单时，页面不会再同步提交，而是由js做异步提交，因此提交后页面不会有刷新。
3. 加入能够与服务器端进行交互的回调函数。
代码如下：
$(document).ready(function () {
//options是一个ajaxForm的配置对象。?
var options = {
//target: '#output1', // target element(s) to be updated with server response
//beforeSubmit: showRequest, // pre-submit callback
<FONT color=#ff0000> success: callBackFunc // post-submit callback</FONT>
// other available options:
//url: url // override for form's 'action' attribute
//type: type // 'get' or 'post', override for form's 'method' attribute
//dataType: null // 'xml', 'script', or 'json' (expected server response type)
//clearForm: true // clear all form fields after successful submit
//resetForm: true // reset the form after successful submit
// $.ajax options can be used here too, for example:
//timeout: 3000
};
// bind form using 'ajaxForm'
$('#myForm').ajaxForm(options);
});
// responseText是服务端的响应值。statusText是页面
// 提交状态值，success表示成功。
function callBackFunc(responseText, statusText) {
if (statusText == 'success') {
alert(responseText);
}
else{
alert(“服务端错误！”);
}
}
如果返回的是json数据则回调函数可以这么写
function resultFunction(responseText,statusText) {
if (statusText == 'success') {
if (responseText.code == 1) {
alert(responseText.message);
}
else {
alert('error occurs!');
}
}
else {
alert('服务器错误！');
}
}服务端的代码如下：
代码如下：
[HttpPost]
public ActionResult AjaxForm(FormCollection form)
{
string message = "Name:" + form["username"] + " PWD: "+form["password"] ;
//return Content(message);
return Json(new { code = 1, message = message });
}4. 加入提交前的数据校验函数
为options对象添加 beforeSubmit属性
代码如下：
var options = {
//target: '#output1', // target element(s) to be updated with server response
<FONT color=#ff0000>beforeSubmit: checkData, // pre-submit callback
</FONT> success: callBackFunc // post-submit callback
// other available options:
//url: url // override for form's 'action' attribute
//type: type // 'get' or 'post', override for form's 'method' attribute
//dataType: null // 'xml', 'script', or 'json' (expected server response type)
//clearForm: true // clear all form fields after successful submit
//resetForm: true // reset the form after successful submit
// $.ajax options can be used here too, for example:
//timeout: 3000
};
// pre-submit callback
function checkData(formData, jqForm, options) {
// formData is an array; here we use $.param to convert it to a string to display it
// but the form plugin does this for you automatically when it submits the data
//var queryString = $.param(formData);
// jqForm is a jQuery object encapsulating the form element. To access the
// DOM element for the form do this:
var formElement = jqForm[0];
//alert('About to submit: \n\n' + queryString);
// here we could return false to prevent the form from being submitted;
// returning anything other than false will allow the form submit to continue
//return true;
if ($(formElement).find("#username").val() == "") {
alert("please enter username!");
return false;
} else {
return true;
}
}验证用户名是否为空，是则提示输入，并取消表单提交。
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