我有一个类似于以下的表格：
<form method="post" action="mail.php" id="myForm">
<input type="text" name="fname">
<input type="text" name="lname">
<input type="text" name="email">
<input type="submit">
</form>
我是 AJAX 新手，我想要完成的是当用户单击提交按钮时，我希望mail.php脚本在不刷新页面的情况下在幕后运行。
我尝试了类似下面的代码，但是，它似乎仍然像以前一样提交表单，而不是像我需要的那样（在幕后）：
$.post('mail.php', $('#myForm').serialize());
如果可能的话，我想获得使用 AJAX 实现此功能的帮助，
提前谢谢了
您需要阻止默认操作（实际提交）。
$(function() {
$('form#myForm').on('submit', function(e) {
$.post('mail.php', $(this).serialize(), function (data) {
// This is executed when the call to mail.php was succesful.
// 'data' contains the response from the request
}).error(function() {
// This is executed when the call to mail.php failed.
});
e.preventDefault();
});
});
您还没有提供完整的代码，但听起来问题是因为您正在执行$.post()表单的提交，但没有停止默认行为。试试这个：
$('#myForm').submit(function(e) {
e.preventDefault();
$.post('mail.php', $('#myForm').serialize());
});
/**
* it's better to always use the .on(event, context, callback) instead of the .submit(callback) or .click(callback)
* for explanation why, try googling event delegation.
*/
//$("#myForm").on('submit', callback) catches the submit event of the #myForm element and triggers the callbackfunction
$("#myForm").on('submit', function(event, optionalData){
/*
* do ajax logic -> $.post is a shortcut for the basic $.ajax function which would automatically set the method used to being post
* $.get(), $.load(), $.post() are all variations of the basic $.ajax function with parameters predefined like 'method' used in the ajax call (get or post)
* i mostly use the $.ajax function so i'm not to sure extending the $.post example with an addition .error() (as Kristof Claes mentions) function is allowed
*/
//example using post method
$.post('mail.php', $("#myForm").serialize(), function(response){
alert("hey, my ajax call has been complete using the post function and i got the following response:" + response);
})
//example using ajax method
$.ajax({
url:'mail.php',
type:'POST',
data: $("#myForm").serialize(),
dataType: 'json', //expects response to be json format, if it wouldn't be, error function will get triggered
success: function(response){
alert("hey, my ajax call has been complete using the ajax function and i got the following response in json format:" + response);
},
error: function(response){
//as far as i know, this function will only get triggered if there are some request errors (f.e: 404) or if the response is not in the expected format provided by the dataType parameter
alert("something went wrong");
}
})
//preventing the default behavior when the form is submit by
return false;
//or
event.preventDefault();
})
试试这个：
$(function () {
$('form').submit(function () {
if ($(this).valid()) {
$.ajax({
url: this.action,
type: this.method,
data: $(this).serialize(),
success: function (result) {
$('#result').html(result);
}
});
}
return false;
});
});
执行此操作的现代方法（也不需要 jquery）是使用fetch API。较旧的浏览器将不支持它，但如果这是一个问题，则有一个polyfill。例如：
var form = document.getElementById('myForm');
var params = {
method: 'post',
body: new FormData(form),
headers: {
'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
}
};
form.addEventListener('submit', function (e) {
window.fetch('mail.php', params).then(function (response) {
console.log(response.text());
});
e.preventDefault();
});
试试这个..
<form method="post" action="mail.php" id="myForm" onsubmit="return false;">
或者
添加
e.preventDefault();在你的click功能中
$(#yourselector).click(function(e){
$.post('mail.php', $(this).serialize());
e.preventDefault();
})
如果您将输入类型用作 submit ，则需要防止默认操作<input type="submit" name="submit" value="Submit">。
通过将$("form").submit(...)您附加提交处理程序，这将提交表单（这是默认操作）。
如果不想要这个默认操作使用preventDefault()方法。
如果您使用的不是提交，则无需阻止默认值。
$("form").submit(function(e) {
e.preventDefault();
$.ajax({
type: 'POST',
url: 'save.asmx/saveData',
dataType: 'json',
contentType:"application/json;charset=utf-8",
data: $('form').serialize(),
async:false,
success: function() {
alert("success");
}
error: function(request,error) {
console.log("error");
}
查看JQuery Post文档。它应该可以帮助你。