Jump to content
Sign in to follow this  
Followers 0
Imoddedu

XML Viewing

By Imoddedu, in XML

Recommended Posts

Imoddedu    0

Imoddedu
Posted

The problem is that only "Latest News" shows, the rest doesn't, and I have no idea what to do >.< Here is the code

<script type="text/javascript">if (window.XMLHttpRequest)  {  xhttp=new XMLHttpRequest();  }else // for older IE 5/6  {  xhttp=new ActiveXObject("Microsoft.XMLHTTP");  }xhttp.open("GET","news.xml",false);xhttp.send("");xmlDoc=xhttp.responseXML;document.write("<h3>Latest News</h3>");document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[0].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[0].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[0].childNodes[0].nodeValue;</script>

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted (edited)

WHERE is the script? The code is in the global space, so it runs as soon as that section of the page loads. If this script is in your <head> element, it will fail, because "author" and all those other elements don't exist yet.For this to work as it is written, the script must be physically placed BELOW "author" and those other elements.Otherwise, the code should all be placed in a function to be called on page load.If that is not the problem, then you might try alerting the value of your XML nodes just to see if they have values.Note that if you try to access the value of a text node and the node is empty, you will throw an error and the script will terminate. It is good practice to test the length of any childNodes collection before trying to access its members. The simplest thing is to write your own getNodeValue function to automate this, and have it return an empty string if no child elements exist.

Edited by Deirdre's Dad

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted (edited)

FWIW, I pulled this out of an old project. I think it still works (the project is still running) but it's been a while since I really looked at it:

function get_node_value (n) {   if (!n) return "err";   return n.childNodes[0] ? n.childNodes[0].nodeValue : "";}// use it like this:function populate ()   var myNode = xmlDoc.getElementsByTagName("author")[0];   var val = get_node_value (myNode);   document.getElementById("author").innerHTML = val;   // or combine all that and use it more tersely:   document.getElementById("author").innerHTML = get_node_value (xmlDoc.getElementsByTagName("author")[0]);}

Edited by Deirdre's Dad

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted (edited)

Ah Ok, I see the problem now thanks for the help!EDIT***I got it to display 1 item, how can I display all three items of the XML file?

Edited by Imoddedu

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

I tried changing the number in childNodes[0] but that didn't do anything.

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

Ok, here is the javascript code:

<!-- Start of XML Feed (News) -->	<script type="text/javascript">if (window.XMLHttpRequest)  {  xhttp=new XMLHttpRequest();  }else // for older IE 5/6  {  xhttp=new ActiveXObject("Microsoft.XMLHTTP");  }xhttp.open("GET","news.xml",false);xhttp.send("");xmlDoc=xhttp.responseXML;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[0].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[0].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[0].childNodes[0].nodeValue;</script><!-- End XML Feed (News) -->

and the XML

<?xml version="1.0"?><news>	<author>Name</author>	<date>Wednesday, May 25th, 2010</date>	<title>Reminder</title>	<description>Don't forget to edit this!</description>		<author>Name_01</author>	<date>Wednesday, May 27th, 2010</date>	<title>Title goes here</title>	<description>Should Edit this!</description>	</news>

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted

Each element only has one childNode. Using a childNodes index greater than 0 will throw an error. To get a different element, you need to change the index of the collection returned by getElementsByTagName:xmlDoc.getElementsByTagName("author")[change me]

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

Thanks! I can't believe I didn't see that! *facepalm*

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted (edited)

Now what happens is that it shows the last XML thing.XML Code:

<?xml version="1.0"?><news>	<author>name</author>	<date>Wednesday, May 25th, 2010</date>	<title>Reminder</title>	<description>Don't forget to edit this!</description>		<author>name</author>	<date>Wednesday, May 26th, 2010</date>	<title>You...</title>	<description>Should Edit this!</description>		<author>name</author>	<date>Wednesday, May 27th, 2010</date>	<title>Me!</title>	<description>I'm on your wall!</description> ----That is what it shows, that entry	</news>

and the javascript

<script type="text/javascript">if (window.XMLHttpRequest)  {  xhttp=new XMLHttpRequest();  }else // for older IE 5/6  {  xhttp=new ActiveXObject("Microsoft.XMLHTTP");  }xhttp.open("GET","news.xml",false);xhttp.send("");xmlDoc=xhttp.responseXML;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[0].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[0].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[0].childNodes[0].nodeValue;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[1].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[1].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[1].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[1].childNodes[0].nodeValue;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[2].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[2].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[2].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[2].childNodes[0].nodeValue;</script>

Edited by Imoddedu

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted

Yup. It actually does display the contents of all three, but each time you change the index you are erasing the contents of the HTML elements and replacing it with the new contents.What would you like the HTML to look like when all the content has been added?

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

I just want the 3 like "blocks" of content to be displayed.

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted (edited)

If you mean something like this:authordatetitledescriptionauthordatetitledescriptionauthordatetitledescriptionthen you will need 3 sets of HTML elements, and each element will need a unique id, like author0, author1, author2, and so on.

Edited by Deirdre's Dad

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

Now the page just has:By: ,By: ,By: , Here it is:HTML w/ JavaScript

<ul>	<li>By: <span id="author0"></span>, <span id="date0"></span><br /><b><span id="title0"></b></span><br /><span id="description0"></span></li>	<li>By: <span id="author1"></span>, <span id="date1"></span><br /><b><span id="title1"></b></span><br /><span id="description1"></span></li>	<li>By: <span id="author2"></span>, <span id="date2"></span><br /><b><span id="title2"></b></span><br /><span id="description2"></span></li>	</ul><!-- Start of XML Feed (News) -->	<script type="text/javascript">if (window.XMLHttpRequest)  {  xhttp=new XMLHttpRequest();  }else // for older IE 5/6  {  xhttp=new ActiveXObject("Microsoft.XMLHTTP");  }xhttp.open("GET","news.xml",false);xhttp.send("");xmlDoc=xhttp.responseXML;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[0].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[0].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[0].childNodes[0].nodeValue;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[1].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[1].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[1].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[1].childNodes[0].nodeValue;document.getElementById("author").innerHTML=xmlDoc.getElementsByTagName("author")[2].childNodes[0].nodeValue;document.getElementById("date").innerHTML=xmlDoc.getElementsByTagName("date")[2].childNodes[0].nodeValue;document.getElementById("title").innerHTML=xmlDoc.getElementsByTagName("title")[2].childNodes[0].nodeValue;document.getElementById("description").innerHTML=xmlDoc.getElementsByTagName("description")[2].childNodes[0].nodeValue;</script><!-- End XML Feed (News) -->

and the XML

<?xml version="1.0"?><news>	<author>name</author>	<date>Wednesday, May 25th, 2010</date>	<title>Reminder</title>	<description>Don't forget to edit this!</description>		<author>name</author>	<date>Wednesday, May 26th, 2010</date>	<title>You...</title>	<description>Should Edit this!</description>		<author>name</author>	<date>Wednesday, May 27th, 2010</date>	<title>Me!</title>	<description>I'm on your wall!</description>	</news>

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted (edited)

I assumed you would understand that you would have to change these references to correspond:document.getElementById("author")becomesdocument.getElementById("author0")and so on. I am sorry if that was not clear.

Edited by Deirdre's Dad

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

Nah it's fine, it takes me a while to realize some things! haha :) Again, the same problem.

	<script type="text/javascript">if (window.XMLHttpRequest)  {  xhttp=new XMLHttpRequest();  }else // for older IE 5/6  {  xhttp=new ActiveXObject("Microsoft.XMLHTTP");  }xhttp.open("GET","news.xml",false);xhttp.send("");xmlDoc=xhttp.responseXML;document.getElementById("author0").innerHTML=xmlDoc.getElementsByTagName("author0")[0].childNodes[0].nodeValue;document.getElementById("date0").innerHTML=xmlDoc.getElementsByTagName("date0")[0].childNodes[0].nodeValue;document.getElementById("title0").innerHTML=xmlDoc.getElementsByTagName("title0")[0].childNodes[0].nodeValue;document.getElementById("description0").innerHTML=xmlDoc.getElementsByTagName("description0")[0].childNodes[0].nodeValue;document.getElementById("author1").innerHTML=xmlDoc.getElementsByTagName("author1")[0].childNodes[0].nodeValue;document.getElementById("date1").innerHTML=xmlDoc.getElementsByTagName("date1")[0].childNodes[0].nodeValue;document.getElementById("title1").innerHTML=xmlDoc.getElementsByTagName("title1")[0].childNodes[0].nodeValue;document.getElementById("description1").innerHTML=xmlDoc.getElementsByTagName("description1")[0].childNodes[0].nodeValue;document.getElementById("author2").innerHTML=xmlDoc.getElementsByTagName("author2")[0].childNodes[0].nodeValue;document.getElementById("date2").innerHTML=xmlDoc.getElementsByTagName("date2")[0].childNodes[0].nodeValue;document.getElementById("title2").innerHTML=xmlDoc.getElementsByTagName("title2")[0].childNodes[0].nodeValue;document.getElementById("description2").innerHTML=xmlDoc.getElementsByTagName("description2")[0].childNodes[0].nodeValue;</script><!-- End XML Feed (News) -->

and again, the XML :)

<?xml version="1.0"?><news>	<author0>name</author0>	<date0>Wednesday, May 25th, 2010</date0>	<title>Reminder</title>	<description>Don't forget to edit this!</description>		<author1>name</author1>	<date1>Wednesday, May 26th, 2010</date1>	<title1>You...</title1>	<description1>Should Edit this!</description1>		<author2>name</author2>	<date2>Wednesday, May 27th, 2010</date2>	<title2>Me!</title2>	<description2>I'm on your wall!</description2>	</news>

Share this post

Link to post
Share on other sites

jeffman    86

jeffman
Posted

I must have missed your reply. Sorry about that. :) The immediate problem is that when you changed your XML, you did not do it completely. So you have no element called <title0>, and that is where your script terminates.The bigger problem is that you changed your XML!!! There was no need for that. I have revised your code (it did not take long) to show you what will work. Please notice how I change the index values that we discussed in Post #8.XML

<author>name</author><date>Wednesday, May 25th, 2010</date><title>Reminder</title><description>Don't forget to edit this!</description><author>name</author><date>Wednesday, May 26th, 2010</date><title>You...</title><description>Should Edit this!</description><author>name</author><date>Wednesday, May 27th, 2010</date><title>Me!</title><description>I'm on your wall!</description>

JavaScript

document.getElementById("author0").innerHTML=xmlDoc.getElementsByTagName("author")[0].childNodes[0].nodeValue;document.getElementById("date0").innerHTML=xmlDoc.getElementsByTagName("date")[0].childNodes[0].nodeValue;document.getElementById("title0").innerHTML=xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;document.getElementById("description0").innerHTML=xmlDoc.getElementsByTagName("description")[0].childNodes[0].nodeValue;document.getElementById("author1").innerHTML=xmlDoc.getElementsByTagName("author")[1].childNodes[0].nodeValue;document.getElementById("date1").innerHTML=xmlDoc.getElementsByTagName("date")[1].childNodes[0].nodeValue;document.getElementById("title1").innerHTML=xmlDoc.getElementsByTagName("title")[1].childNodes[0].nodeValue;document.getElementById("description1").innerHTML=xmlDoc.getElementsByTagName("description")[1].childNodes[0].nodeValue;document.getElementById("author2").innerHTML=xmlDoc.getElementsByTagName("author")[2].childNodes[0].nodeValue;document.getElementById("date2").innerHTML=xmlDoc.getElementsByTagName("date")[2].childNodes[0].nodeValue;document.getElementById("title2").innerHTML=xmlDoc.getElementsByTagName("title")[2].childNodes[0].nodeValue;document.getElementById("description2").innerHTML=xmlDoc.getElementsByTagName("description")[2].childNodes[0].nodeValue;

Share this post

Link to post
Share on other sites

Imoddedu    0

Imoddedu
Posted

Thanks so much! I finally understand this now! Amazing stuff man, thanks for all the help. P.S., it works. :)

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
Sign in to follow this  
Followers 0
Go To Topic Listing
×
×
  • Create New...