http://www.vaikan.com/docs/jquery.form.plugin/jquery.form.plugin.html#
1. 在你的頁面裡寫一個表單。一個普通的表單，不需要任何特殊的標記：
. 代碼如下:
<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>
在沒有Jquery.Form組件的時候，提交表單，頁面會進入阻塞模式，等待服務器端的響應。
2. 引入jQuery和Form Plugin Javascript腳本文件並且添加幾句簡單的代碼讓頁面在DOM加載完成後初始化表單：
<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
// 為myform綁定ajaxForm異步提交事件，並提供一個簡單的回調函數。
$('#myForm').ajaxForm(function() {
alert("Thank you for your comment!");
});
});
</script>
</head>
加上jquery.form組件後，提交表單時，頁面不會再同步提交，而是由js做異步提交，因此提交後頁面不會有刷新。
3. 加入能夠與服務器端進行交互的回調函數。
. 代碼如下:
$(document).ready(function () {
//options是一個ajaxForm的配置對象。?
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是服務端的響應值。statusText是頁面
// 提交狀態值，success表示成功。
function callBackFunc(responseText, statusText) {
if (statusText == 'success') {
alert(responseText);
}
else{
alert(“服務端錯誤！”);
}
}
如果返回的是json數據則回調函數可以這麼寫
function resultFunction(responseText,statusText) {
if (statusText == 'success') {
if (responseText.code == 1) {
alert(responseText.message);
}
else {
alert('error occurs!');
}
}
else {
alert('服務器錯誤！');
}
}
服務端的代碼如下：
. 代碼如下:
[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. 加入提交前的數據校驗函數
為options對象添加 beforeSubmit屬性
. 代碼如下:
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;
}
}
驗證用戶名是否為空，是則提示輸入，並取消表單提交。