您好我正在对我的php端进行ajax调用以在数据库中添加或编辑。我根据完成的内容返回三个选项。用firebug调试之后我看到每次提交后添加/编辑/删除有多个调用到php端（每次都加倍）我已经做了很多关于尝试取消绑定和绑定的内容，只允许事件处理程序执行一次，但一旦我这样做，提交按钮不起作用，直到页面重新加载，这不是我想要的。请帮忙！
Javascript页面：
//$('#addAgeGroupForm').trigger("reset");
//$(document).ready(function() {
$(function() {
$("#dialog").dialog({
autoOpen:false,
maxWidth:600,
maxHeight: 500,
width: 500,
height: 350,
async: false,
close: function(){
$('#addAgeGroupForm').trigger("reset");
$.ajax({
type: "GET",
url: "/Ajax/ajax_reset_id.php",
async: false,
success: function(html){
$("#responce_event").html(html);
}
});
}
});
$("#addAgeGroup").on("click", function()
{
$("#dialog").dialog("open");
});
$("#addAgeGroupForm").submit(function(e)
{
e.preventDefault();
var postData = jQuery(this).serialize();
var data = "";
$("#dialog").dialog("close")
$.ajax({
type: "POST",
url: "/Add/AddAgeGroups.php",
dataType: 'json',
async: false,
data: postData,
success: function(result){
data = result;
$('#ageGroups').load('Tables/agegroupTable.php').fadeIn("slow");
if (data==1)
{
alert("Error: Please fill in all fields");
}
else if(data==2)
{
alert("Error: Duplicate Age Group entry for this Meet");
}
else
{
alert(data);
//alert("success");
$('#ageGroups').load('Tables/agegroupTable.php').fadeIn("slow");
}
},
error: function(jqXHR, exception) {
if (jqXHR.status === 0) {
alert('Not connect.\n Verify Network.');
} else if (jqXHR.status == 404) {
alert('Requested page not found. [404]');
} else if (jqXHR.status == 500) {
alert('Internal Server Error [500].');
} else if (exception === 'parsererror') {
alert('Requested JSON parse failed.');
} else if (exception === 'timeout') {
alert('Time out error.');
} else if (exception === 'abort') {
alert('Ajax request aborted.');
} else {
alert('Uncaught Error.\n' + jqXHR.responseText);
}
}
});
});
$('[id^="editAgeGroup"]').submit(function(e)
{
e.preventDefault();
var editData = jQuery(this).serialize();
$.ajax({
type: "POST",
url: "/Get/GetAgeGroup.php",
async: false,
dataType: 'json',
data: editData,
success: function(data){
var form = document.forms['addAgeGroupForm'];
form.id.value=data.id;
form.agegroup.value=data.agegroup;
form.abbrev.value=data.abbrev;
form.sort.value=data.sort;
}
});
$("#dialog").dialog("open");
});
$("#dialog2").dialog({
autoOpen:false,
maxWidth:600,
maxHeight: 500,
width: 500,
height: 300,
async: false,
close: function(){
$('#deleteAgeGroupForm').trigger("reset");
$.ajax({
type: "GET",
url: "/Ajax/Delete/ajax_delete_ageGroup.php",
async: false,
success: function(html){
$("#responce_delete").html(html);
}
});
}
});
$('[id^="deleteAgeGroup"]').submit(function(e)
{
e.preventDefault();
var deleteData = jQuery(this).serialize();
$.ajax({
type: "POST",
url: "/Get/GetAgeGroup.php",
dataType: 'json',
data: deleteData,
success: function(data){
var form = document.forms['deleteAgeGroupForm'];
var id = data.id;
var name = data.agegroup;
form.age_group_id.value = data.id;
$.ajax({
type: "GET",
url: "/Ajax/Delete/ajax_delete_ageGroup.php?id="+id+"&name="+name,
async: false,
success: function(html){
$("#responce_delete").html(html);
}
});
}
});
$("#dialog2").dialog("open");
});
$("#deleteAgeGroupForm").submit(function(e)
{
e.preventDefault();
var postData = jQuery(this).serialize();
var editData = jQuery(this).serialize();
$("#dialog2").dialog("close")
$.ajax({
type: "POST",
url: "/Get/GetAgeGroup.php",
dataType: 'json',
async: false,
data: editData,
success: function(data){
var id = data.id;
//alert(data.id);
//alert(data.schoolname);
$.ajax({
type: "Get",
url: "Delete/DeleteAgeGroup.php?id="+id,
dataType: 'json',
async: false,
data: postData,
success: function(data){
//alert(data);
//alert("success");
$('#ageGroups').load('Tables/agegroupTable.php').fadeIn("slow");
},
error: function(jqXHR, exception) {
if (jqXHR.status === 0) {
alert('Not connect.\n Verify Network.');
} else if (jqXHR.status == 404) {
alert('Requested page not found. [404]');
} else if (jqXHR.status == 500) {
alert('Internal Server Error [500].');
} else if (exception === 'parsererror') {
alert('Requested JSON parse failed.');
} else if (exception === 'timeout') {
alert('Time out error.');
} else if (exception === 'abort') {
alert('Ajax request aborted.');
} else {
alert('Uncaught Error.\n' + jqXHR.responseText);
}
}
});
}});
});
/******************/
})
function updateTable()
{
$('#ageGroups').load('Tables/agegroupTable.php').fadeIn("slow");
}
PHP方面：
session_start();
if($_SESSION["logged_in"] == 0)
header("Location: ****");
else if($_SESSION["type"] == "general")
header("Location: ****");
else
{
$agegroup = addslashes($_POST['agegroup']);
$abbrev = addslashes($_POST['abbrev']);
$sort = addslashes($_POST['sort']);
$id = $_POST['id'];
$managerID = $_SESSION["manager_id"];
$meetID = $_SESSION["meet_id"];
$db = mysqli_connect("****", "****", "****","****");
if(!$db){
exit("Error in database connection");
}
else
{
$exists = mysqli_query($db,"SELECT * FROM `AgeGroup` WHERE `AgeGroupLong` = '$agegroup' AND `AgeGroupShort` = '$abbrev' AND `ManagerID` = $managerID AND `MeetID` = $meetID ");
$row = mysqli_fetch_array($exists);
if($_POST['agegroup']=="" || $_POST['abbrev']=="" || $meetID=="")
{
//exit(json_encode(1));
echo json_encode(1);
}
else if($id == "" && $row > 0)
{
echo json_encode(2);
}
else
{
$result = mysqli_query($db, "SELECT * FROM `AgeGroup` WHERE `AgeGroupLong`='$agegroup' AND `AgeGroupShort` = '$abbrev'");
//$row = mysqli_fetch_array($result);
if($id == "")
{
mysqli_query($db, "INSERT INTO `AgeGroup` (`AgeGroupLong`,`AgeGroupShort`,`Sort`, `ManagerID`, `MeetID`) VALUES ('$agegroup', '$abbrev', $sort, $managerID, $meetID)");
}
else
{
$AgeGroup_id = $row['AgeGroupID'];
mysqli_query($db, "UPDATE `AgeGroup` SET `AgeGroupLong`='$agegroup',`AgeGroupShort` = '$abbrev', `Sort`=$sort WHERE `AgeGroupID`=$id");
}
$ageGroup = array
(
'agegroup' => stripslashes($agegroup),
'abbrev' => stripslashes($abbrev),
'sort' => stripslashes($sort)
);
echo json_encode($ageGroup);
}
}
}
mysql_close($db);
答案 0 :(得分：0)
声明全局变量并进行一次ajax请求： -
var is_request_sent = false;
function like_post(wall_post,obj)
{
if(is_request_sent == false)
{
$.ajax({
type: "POST",
dataType: "json",
url: base_url+"ajax_timeline/like_post",
data: "action=like_post&wall_post_id="+wall_post,
success: function(result){//alert(result);alert('here');
is_request_sent = false;
},
error: function(a,b,c)
{
is_request_sent = false;
//fbalert('Error', 'Error occured. Please try again.');
},
beforeSend: function(jqXHR, plain_jqXHR){
is_request_sent = jqXHR;
// Handle the beforeSend event
},
complete: function(){
is_request_sent = false;
// Handle the complete event
}
});
}
}
我希望这会对你有所帮助