jQuery AJAX post submission to a PHP script multiple times

StackOverflow https://stackoverflow.com/questions/7382995

문제

I am trying to do a form submission without having the page reload. It works the first time, but when I try and do a second submission the page is refreshed.

I would like to be able to do several submissions with the new data propagating into the current element. What am I missing.

Here is my first page form.php

<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN">
  <html>
    <head>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
    <script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.min.js"></script>

<script type="text/javascript">
    //<![CDATA[
    jQuery.noConflict();
    jQuery(document).ready(function () {
        jQuery("#form").validate({
            debug: false,
            submitHandler: function (form) {
                jQuery.post('formPost.php',
                    jQuery("#form").serialize(), function (data) {
                    jQuery('#Box').html(data);
                });
            }
        });
    });
    // ]]>
</script>

  </head>
  <body>
    <div id="Box">
      <form id="form" name="form" method="POST" action="">
        <select name="color">
          <option>red</option>
          <option>white</option>
          <option>blue</option>
        </select>
        <input type="submit" name="submit" value="submit" /><br />
      </form>
    </div>
  </body>
</html>

and here is my second page formPost.php

<?php

  switch ($_POST['color'])
  {
    case 'red':
      echo 'you chose red<br /><br />';
      break;

    case 'blue':
      echo 'you chose blue<br /><br />';
      break;

    case 'white':
      echo 'you chose white<br /><br />';
      break;
  }
?>
<form id="form" name="form" method="POST" action="">
  <select name="color">
    <option>red</option>
    <option>white</option>
    <option>blue</option>
  </select>
  <input type="submit" name="submit" value="submit" /><br />
</form>

I want to be able to reuse the same form for multiple form submissions while staying on the same page and having the data apprear in the same div without refreshing the page. Any ideas

도움이 되었습니까?

해결책

Try this:

<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN">
  <html>
    <head>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
    <script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.min.js"></script>

<script type="text/javascript">
    //<![CDATA[
    jQuery.noConflict();
    jQuery(document).ready(function () {
        initializeForm();
    });

    function initializeForm() {
        jQuery("#form").validate({
            debug: false,
            submitHandler: function (form) {
                jQuery.post('formPost.php',
                    jQuery("#form").serialize(), function (data) {
                    jQuery('#Box').html(data);
                    initializeForm();
                });
            }

        });
    }

    // ]]>
</script>

  </head>
  <body>
    <div id="Box">
      <form id="form" name="form" method="POST" action="">
        <select name="color">
          <option>red</option>
          <option>white</option>
          <option>blue</option>
        </select>
        <input type="submit" name="submit" value="submit" /><br />
      </form>
    </div>
  </body>
</html>

I tested this out and it works locally for me. I hope this helps!

다른 팁

You validate action is being bound to the form that exists when the document is ready (since it's in document.ready). However, your PHP script is replacing that form with a different form, so the form that validate is bound to no longer exists. When you you're binding events, you can use something like a live binding to get around this. You probably can't use that with the validate plugin, though. What you should really be doing is writing your response to a different element.

So, something like this:

<html>
  <head>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
    <script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.min.js"></script>
    <script type="text/javascript">
    //<![CDATA[
    jQuery.noConflict ();
    jQuery(document).ready(function(){
      jQuery("#form").validate({
        debug: false,
        submitHandler: function(form) {
        jQuery.post('formPost.php', 
                     jQuery("#form").serialize(), 
                     function(data) {
                       jQuery('#result').html(data); // Note that this modifies #result instead of #Box.
                     });
        }
      });
    });
    // ]]>
  </script>
</head>
<body>
  <div id="Box">
    <form id="form" name="form" method="POST" action="">
      <select name="color">
        <option>red</option>
        <option>white</option>
        <option>blue</option>
      </select>
      <input type="submit" name="submit" value="submit" /><br />
    </form>
  </div>
  <div id="result" /> <!-- Here is where we put out result. -->
</body>
</html>

and then just

<?php

  switch ($_POST['color'])
  {
    case 'red':
      echo 'you chose red<br /><br />';
      break;

    case 'blue':
      echo 'you chose blue<br /><br />';
      break;

    case 'white':
      echo 'you chose white<br /><br />';
      break;
  }
?>
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