Determining List Box Contents in ASP 2

adknbvi · Jul 17, 2001

Hello,
I have a listbox of "selected items" that is dynamically filled by the user (by choosing items off an "Everything that's available" listbox). You've seen these with the "<" and ">" buttons to put things on the user's personal list and then remove them later.

Via ASP, how do I know the contents of the listbox when I have posted the form and am trying to read the contents via Request.Form().

If I can't do it, should I build a comma-delimited list in a hidden input box prior to leaving the first page?

Thanks in advance,
Valerie

vasah20 · Jul 17, 2001

I'm assuming that this is a multiple selection input box, so there is an easy way to do this.

a multiple selection input box is a collection, so all you need to do is iterate through the collection to get everything you need.

ex:
<%
Dim myinput(), i
redim myinput(request.form("myinput&quot

.count)
i = 0
for each item in request.form("myinput&quot

myinput(i) = item.value
i = i + 1
next
%>

this should build you an array, called myinput, containing all the selections from your multiple input box.

hope this helps
leo

adknbvi · Aug 28, 2001

Leo,
I'm sorry to bother you again. I should have mentioned in my first post that I am working in JavaScript. What is the JavaScript equivalent for "for each item in...."? I have tried assuming the results were a string and using the .split method to form an array, but that hasn't worked.

Any help would be greatly appreciated!
Valerie

JoliM · Aug 28, 2001

Since the list now resides only client side and in Javascript, you need to send it back to ASP. Here is an example of one we've used:
//create the list as comma delimited
var listtext = "";
var i;
var j = document.FormList.list1.options.length;
for(var i=0; i<j; i++) {
listtext += document.FormList.list1.options.value;
if ( i +1 < j ) {
listtext += ",";
}
}

URL += "page.asp?listboxinfo="+listtext;
//now sending the page with the list back to the page.asp with the list in the query string
self.location = URL;

You can pull the data from the query string.

Hope that helps,
Joli

adknbvi · Aug 29, 2001

Joli,
Thank you! That was very helpful! I am now moving forward again!
Valerie

shaddow · Aug 29, 2001

My fellow colegs are right...
but...
This is a server side example of getting the values of
multiple selections in JScript

Here is an example of JScript asp side

process.asp
<%@ Language=JScript %>
<%
nrval=Request.Form("options&quot

.Count;
for(i=1;i<=nrval;i++)
{
%>
Request.Form("txt&quot

(<%=i%>)=<%=Request.Form("txt&quot

(i)%><br>
<%
};
%>

and the
page.htm

<HTML>
<BODY>
<form action="process.asp" method="post">
<select name="options" multiple>
<option value="1">1
<option value="2">2
<option value="3">3
<option value="4">4
<option value="5">5
</select>
<INPUT type="submit" value="Submit" id=submit1 name=submit1></form>
</BODY>
</HTML>

This is used without an hidden text to pass the multiple select from page.htm
________
George, M
email : shaddow11_ro@yahoo.com

shaddow · Aug 29, 2001

Sorry one error
Replace the line
Request.Form("txt&quot

(<%=i%>)=<%=Request.Form("txt&quot

(i)%><br>

With
Request.Form("options&quot

(<%=i%>)=<%=Request.Form("options&quot

(i)%><br>

________
George, M
email : shaddow11_ro@yahoo.com

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Determining List Box Contents in ASP 2

adknbvi

Programmer

vasah20

Programmer

adknbvi

Programmer

JoliM

Programmer

adknbvi

Programmer

shaddow

Programmer

shaddow

Programmer

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