Question

Ajax Code

Asked by: stmani2005

When i click combobox that particular value stored with database using Ajax with Jsp and DB2


Could you Give me the correct way for that

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Asked On
2007-02-07 at 01:27:20ID22152717
Tags

ajax

Topic

JavaScript

Participating Experts
1
Points
250
Comments
6

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Answers

 

by: pD_EOPosted on 2007-02-07 at 06:05:58ID: 18484826

 

by: pD_EOPosted on 2007-02-07 at 06:07:05ID: 18484834

Link should have been...

http://www.webreference.com/programming/javascript/ncz/column3/index.html

..also links to part 1 and 2 from that page :)

 

by: pD_EOPosted on 2007-02-07 at 06:08:30ID: 18484847

So sorry, was meant to post this for another question, but had the wrong tab up.

Sorry about that.

 

by: pD_EOPosted on 2007-02-07 at 06:11:55ID: 18484871

Since I'm here...

So you want the selected options values to be sent to the server via AJAX? :)

 

by: stmani2005Posted on 2007-02-07 at 06:32:46ID: 18485068

Yes with jsp

 

by: pD_EOPosted on 2007-02-07 at 06:47:49ID: 18485194

I don't know the JSP language, so can only offer an example.  The Javascript would be basically like this...

<html>
<head>
<title>Combobox Ajax</title>
<script type="text/javascript">
<!--

function XHR(url, params, open){
      this.url = url;
      this.open = open || "GET";
      this.params = params || "";
      this.request = null;
}

XHR.prototype.ready = function(){
      return (this.request.readyState == 4 && this.request.status == 200)? true : false;
}

XHR.prototype.make_request = function(func){
      this.request = (window.XMLHttpRequest)? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
      
      if(this.request){
            this.request.onreadystatechange = func;
            this.request.open(this.open, this.url, true);
            
            if(this.open.toLowerCase() == "post"){
                  this.request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                  this.request.setRequestHeader("Content-length", this.params.length);
                  this.request.setRequestHeader("Connection", "close");
            }

            this.request.send(this.params);
      }
}

function save(){

      // Change GET variable here

      var params = "food=";

      var food = document.getElementById("food").options;

      for(o = 0; o < food.length; o ++){
            if(food.item(o).selected){
                  params += food.item(o).value + ",";
            }
      }

      params = params.substring(0, (params.length - 1));

      // Point to your JSP file here

      var XHRObj = new XHR("food.php?" + params, null, "GET");

      XHRObj.make_request(
            function(){
                  if(XHRObj.ready()){
                        alert(XHRObj.request.responseText);
                  }
            }
      );
}

//-->
</script>
</head>
<body>
<select name="food" id="food" multiple>
      <option value="pizza">Pizza</option>
      <option value="chips">Chips</option>
      <option value="fish">Fish</option>
      <option value="toast">Toast</option>
</select>
<input type="button" value=" Save " onclick="save()" />
</body>
</html>

Have included support for POST incase you can't use GET.

And for me, I use PHP, so all I need to do is split the commas up to make an array which I could then store in a database...

<?php

$food = explode(",", $_GET["food"]);

print_r($food);

?>

Only yours would be JSP.

20120131-EE-VQP-002

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