Member Avatar for Lu5ck

Hi all,

How do you read specific <div> tag from responsetext?
And also, is it possible to count how many <div> tag are there in responsetext?

I have been googling for quite sometime but didn't find any tutorial or explanation nor answer.

Thanks for the help.

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  • 2 Weeks Discussion Span
  • Latest Post Latest Post by langsor

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Member Avatar for langsor

Okay, here's the situation ...

I thought this would be a handy thing to know and am planning on rebuilding my javascript ajax class soon anyway.

What you need to do is two-fold

1. On the server-side script that returns the results you need to set the 'Content-type" to "application/xml" -- this varies by server-side language, but in PHP it looks like this

<?php
header( 'Content-type: application/xml; charset="utf-8"');
print <<<ENDHTML
<html>
  <div>
    <div>Some block content goes here</div>
  </div>
  <div>Some more content goes here</div>
</html>
ENDHTML;
?>

Remember that xml requires a single enclosing container, so I used <html>, but it could be anything -- so long as you do NOT do this ...

<?php
header( 'Content-type: application/xml; charset="utf-8"');
print <<<ENDHTML
<div>
  <div>Some block content goes here</div>
</div>
<div>Some more content goes here</div>
ENDHTML;
?>

... which creates two root-level enclosing containers (the two <div> tags)

2. You need to grab your Ajax results as responseXML and not responseText, so ...

respXML = httpAgent.responseXML;
var divs = respXML.getElementsByTagName('div');
alert( divs.length );

... inside your Ajax function/method.

From here you can do any JavaScript DOM methods on the responseXML.

Hope this helps

Member Avatar for langsor

I so lied !

I can't seem to get elements of the XML using javascript DOM methods in other ways than using getElementsByTagName('tag');

but I'm still working on it, will post back here with any updates.

Ciao

Member Avatar for langsor

Right-O,

It's not as handy as being able to use getElementById() but this sort of thing is working and can be used to get the same results.

var divs = respXML.getElementsByTagName('div');
for ( i = 0; i < divs.length; i ++ ) {
  if ( divs.item(i).getAttribute('id') == 'last_div' ) {
    alert( divs.item(i).firstChild.nodeValue );
  } else {
    alert( divs.item(i).nodeName + ' :: ' + divs.item(i).getAttribute('id') );
  }
}

Here's my altered PHP code

<?php
header( 'Content-type: application/xml; charset="utf-8"' );
print <<<ENDHTML
<html>
  <div id="first_div">
    <div id="nested_div">Some block content goes here</div>
  </div>
  <div id="last_div">Some more content goes here</div>
</html>
ENDHTML;
?>

*Note: All of my dev was done in FF 3 and then verified in IE 7

Hope this helps

Member Avatar for Lu5ck

Hi,

Just for future reference. The solution for this is by using createElement("div")

First declare a variable by using createElement

var tempEle = document.createElement("div");

Then, store the responsetext into the innerHTML of that element variable

tempEle.innerHTML = html;

From there, you can use any getElement command and retrieve information from that variable.

var someID = tempEle.getElementById("hello");
alert(someID.innerHTML);

No server-side code is needed for this.

Member Avatar for langsor

Hi,

Just for future reference. The solution for this is by using createElement("div")

First declare a variable by using createElement

var tempEle = document.createElement("div");

Then, store the responsetext into the innerHTML of that element variable

tempEle.innerHTML = html;

From there, you can use any getElement command and retrieve information from that variable.

var someID = tempEle.getElementById("hello");
alert(someID.innerHTML);

No server-side code is needed for this.

Wanted to thank you for that piece of information. It's good to know and will certainly come in handy ...

Thanks

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