Question

retrieve information into webpage upon choosing item from combo box

Asked by: limhodav

Hi,

I have a combo box in my webpage which contains names of people in a Access database which also contains other information about that person.

When I choose an item in the combo box, I wish to be able to lookup the database and retrieve the remainin details about that person and display it on the webpage.  For example, if I choose Alex from the combobox, the webpage should display his email address and tel no on the SAME page.  No submit button.

I know I should be using the OnChange property but I don't know how to combine Javascript with ASP.

Thanks  

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Asked On
2006-05-19 at 00:35:46ID21856430
Topics

Active Server Pages (ASP)

,

Macromedia Homesite

Participating Experts
3
Points
250
Comments
7

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Answers

 

by: vincent_figoPosted on 2006-05-19 at 02:19:29ID: 16716350

You need AJAX to do that, and you'll have to build a webservice... I suggest you dig in into these topics... you can find lots of tutorials on the net regarding these options... Explaining them here would be quite hard... :)

 

by: chisholmdPosted on 2006-05-19 at 07:30:56ID: 16718407

You could also do this with an iframe which should be easier.


The outline of your page would be sort of like this.

---------------------------------------------------------------------------
<script>
function fetchuserinfo(uid){
  vIframe = document.getElementById('myiframe')
  vIframe.src = '/fetchuser.asp?uid=' + uid
}
</script>

<select name='userlist' onchange='fetchuserinfo(this.options[this.selectedIndex].value)'>
    <option value='1'>Bob</option>
    <option value='2'>Doug</option>
</select>


<iframe width='100%' height='350px' id='myiframe' src='' frameborder='0' scrolling='auto' />
---------------------------------------------------------------------------

fetchuser.asp would contain your call to the db and return the HTML to disply the user details.

 

by: shaggy_the_sheepPosted on 2006-05-19 at 11:30:25ID: 16720365

Hi

If you want to do this using AJAX its not too difficult.

Insert this between your <head> tags

<script language="javascript" type="text/javascript" src="ajax.js"></script>
Heres a link to download the AJAX include file from my website...
www.fast-chat.co.uk/_private/ajax.js You can download it to your server if you like.
<script language="javascript" type="text/javascript">
function getDetails(name){//i am assuming that the value of the selectbox will be the person's name.
var request = getNewXMLHttpRequest();
request.open('GET','getDetails.asp?name=' + escape(name), false);
request.send(false);

document.getElementById('person_details').innerHTML = request.responseText
}
</script>

Change you select box to this
<select name..... onchange="getDetails(this.value)">

Now for getDetails.asp

<%
Response.Expires = -1000
Response.Buffer = True

name = Replace(Request.QueryString("Name"),"'","''")

'Connect to your database as usual
sql = "SELECT * FROM YourTable WHERE TheirName = " & name
'Open your recordset

if not rs.Eof then

'create a the page as you would if it was a totally separate page. You can control the layout as you wish. You do not need to include <HTML>, <HEAD> or <BODY> tags.

end if
'Close recordset
%>

I'm pretty sure this should work straight away..let me know if you get any errors

Richard

 

by: shaggy_the_sheepPosted on 2006-05-19 at 11:31:36ID: 16720373

sorry, forgot to add the last but...

you need to create a <span> or <div> where you would like the user's info to appear. Its id need to be "person_details"

Richard

 

by: limhodavPosted on 2006-05-21 at 22:05:37ID: 16731613

Hi Chrisholmd,

I have tried your method. It does work but after inserting the frame and data within the frame (inside a table cell), contents below the frame disappears.  Does it mean there cannot be anything below the frame? Don't think so  ....

What can i do then?
 

As for AJAX, I have not tried the method yet. Will do so if this method fails

 

by: chisholmdPosted on 2006-05-21 at 22:30:10ID: 16731667

Do a view source and see what it says at the bottom. Sometimes an error is thrown but for some reason is not displaying.

If there is an error message let me know what it is, also if this is a public page, send the link.

 

by: limhodavPosted on 2006-05-22 at 12:00:05ID: 16736916

Dear Chris,

In the meantime, I went to take a look at the codes on XMLHTTP and tried them myself. After some modifications, it does work.  Just have to be careful to take into account both Mozilla and IE browsers.  

So I decide to split the points between u and shaggy since I have tried both set of codes and they worked.  

20120131-EE-VQP-002

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