我有一个PHP表单,可以在jQuery的帮助下发送数据。每当我点击“提交”时,我看到它会发送两次数据,导致双重数据库条目,依此类推。
此外,我还在研究如何在try / catch块中显示“错误”和异常。
注意:此表单适用于其他网站,我只更改字段以及发送数据但无法使其生效。
感谢您的帮助。
<div id="registration" class="representativeForm">
<div class="result">
</div>
<div class="formbody">
<div class="left">
<input required="required" type="text" name="name" placeholder="Your name" />
<input required="required" type="text" name="surname" placeholder="Your surname" />
<input required="required" type="text" name="birthdate" placeholder="Your birth date" />
<input required="required" type="text" name="nationality" placeholder="Your nationality" />
<?php countriesSelection($con, $_LANG, "country"); ?>
<input required="required" type="email" name="email" placeholder="Your Email adress" />
<input required="required" type="text" name="position" placeholder="Your title or job position" />
<div class="schoolSelectionfields">
<?php schoolSelection($con, $_LANG, "schools"); ?>
</div>
<input type="checkbox" id="schoolnotlisted" name="schoolnotlisted" value="1">Your school is not listed? Register school here.<br />
</div>
<div class="right">
<div class="school_register">
<?php schoolRepresentativeRegistration($_LANG, $con); ?>
</div>
</div>
</div>
<input type="hidden" name="form" value="representativeForm">
<input type="submit" value="Register" id="representativeSubmit" />
</div>
$("#representativeSubmit").click(function() {
var proceed = true;
//simple validation at client's end
//loop through each field and we simply change border color to red for invalid fields
$("#registration.representativeForm input[required=true]").each(function(){
$(this).css('border-color','');
if(!$.trim($(this).val())){ //if this field is empty
$(this).css('border-color','red'); //change border color to red
proceed = false; //set do not proceed flag
}
//check invalid email
var email_reg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
if($(this).attr("type")=="email" && !email_reg.test($.trim($(this).val()))) {
$(this).css('border-color','red'); //change border color to red
proceed = false; //set do not proceed flag
}
});
if(proceed) //everything looks good! proceed...
{
//get input field values data to be sent to server
post_data = {
'form' : $('input[name=form]').val(),
'name' : $('input[name=name]').val(),
'surname' : $('input[name=surname]').val(),
'birthdate' : $('input[name=birthdate]').val(),
'nationality' : $('input[name=nationality]').val(),
'email' : $('input[name=email]').val(),
'position' : $('input[name=position]').val(),
'country' : $('select[name=country]').val(),
};
if($("#schoolnotlisted").prop('checked') == true) {
post_data += {
'schoolName' : $('input[name=schoolName]').val(),
'schoolAddress' : $('input[name=schoolAddress]').val(),
'schoolZipcode' : $('input[name=schoolZipcode]').val(),
'schoolCity' : $('input[name=schoolCity]').val(),
'schoolCountry' : $('select[name=schoolCountry]').val()
};
}
else {
post_data += {
'schools' : $('select[name=schools]').val()
};
}
//Ajax post data to server
$.post('registration.php', post_data, function(response){
if(response.type == 'error'){ //load json data from server and output message
output = '<div class="error">'+response.text+'</div>';
}else{
output = '<div class="success">'+response.text+'</div>';
//reset values in all input fields
$("#registration.representativeForm input[required=true]").val('');
$("#registration.representativeForm .formbody").slideUp(); //hide form after success
}
$("#registration .result").hide().html(output).slideDown();
}, 'json');
}
});
//reset previously set border colors and hide all message on .keyup()
$("#registration.representativeForm input[required=true]").keyup(function() {
$(this).css('border-color','');
$(".result").slideUp();
});
答案 0 :(得分:0)
尝试将事件处理程序更改为表单本身,而不是更改为提交按钮,并在其中放置event.preventDefault()
语句。由于您没有发布您的表单代码,我只是将其命名为#34; form&#34;。
$( "#form" ).submit(function( event ) {
event.preventDefault();
// here comes everything from the click handler attached to "#representativeSubmit"
});
你的发布量增加一倍的原因是你执行了附加到提交功能的功能,之后也会将提交事件提供给表单。
答案 1 :(得分:0)
它会发送重复数据,因为您绑定了提交按钮的click
事件。绑定函数完成后,表单会提交 - 触发submit
事件,但您没有绑定到此事件,因此它会发送另一个请求。
您没有在代码中包含form
,因此我假设它存在于您的代码中的上方
更改行
$("#representativeSubmit").click(function() {
到
$("#representativeSubmit").closest('form').submit(function() {
这将选择换行表单,并将您的例程绑定到该表单的提交事件。
另外,您是否可以在浏览器的开发者工具中确认是否实际有2个AJAX调用?如果您使用的是Chrome,请按F12并转到“网络”标签,然后按XHR过滤。在点击任何内容之前执行此操作。
答案 2 :(得分:0)
单击
时修复重复请求ajax$('#representativeSubmit').unbind().bind('click', function(event){
event.preventDefault();
//.....
});