Passing variables from Javascript to ASP

[ernesto]

Please help.
I use ASP and java script in my programs.
I need to read the URL direction and then store it in an ASP session object so I can read it at any time later.
I have no problem to get the URL with java using (location.href), but I just cannot find the way to pass that variable to my session object.

I already spent too much time looking for an answer to my question.

[bakpao]

Not entirely sure with what you need and the interaction required but you can pass in the value of a texbox as a parameter for asp page.

<input type="button" id="cmdNextPage" class="Button" value="NextPage" 
onclick="javascript:window.location='mypage.asp?ItemToSave='+document.getElementById('sometextinput').value" />
 

And in mypage.asp:

Session("MyValue") = Request("ItemToSave")
 

[pbmods]

Heya, Ernesto. Welcome to TSDN!

Do you need to store the URL to a session, variable, or can you use a cookie for that?

[ernesto]

Heya, Ernesto. Welcome to TSDN!

Do you need to store the URL to a session, variable, or can you use a cookie for that?

Hi pbmods, I know I wasn't too clear in my question, but if you have a moment I'll try to explain this better; here it goes...

I have a link (not a textbox) on one ASP page that takes me to a second one
(response.write "<a href=ASP2.asp?" & (photoID) & ">Click here to go to second ASP page</a>"
this link is a field photoID in a record read from a data base, displayed as a link, and then goes back in a "for-next" loop to read the next record.

ASP2
On this second ASP page I need to read the field photoID and put it in a session object - session("photoID") -
so I thought that the easiest way to do it was by sending the userID field attached at the end of the URL and then I can extract it from the URL string.
The thing is that the variable photoID is read from a data base and displayed in a for-next loop as a link to the second ASP page, so when it finishes reading the table from the data base I only have available the last record read from the DB, and what I need is to be able to click on any photoID link displayed and somehow retrieve that photoID value.
I know I'm not so good at explaining but if you understand my problem and have a second to help me I will appreciate it very much.
Thank you,
Ernesto

[pbmods]

Heya, Ernesto.

So the value of the session variable depends on which link the User clicks?

[ernesto]

Heya, Ernesto.

So the value of the session variable depends on which link the User clicks?

Hi, thank you for taking the time to write me.
Yes, the value I need to give the variable is exactly the link the user clicks.

[pbmods]

Heya, Ernesto.

I'm going to go ahead and move this thread to the ASP forum, where our resident Experts will be better able to help you out.

[jhardman]

Ernesto,

syntax for the URL with a querystring in it should be [html]<a href="ASP2.asp?photoID=234">Click here to go to second ASP page</a>"[/html]It looks like you are generating this with javascript, so I'm betting you already know enough to handle that part (putting the link in the right syntax) by yourself. Accessing the data and storing it in a session variable is very easy:

session("photoID") = request.querystring("photoID")

Let me know if this helps.

Jared

[markrawlingson]

I have a link (not a textbox) on one ASP page that takes me to a second one
(response.write "<a href=ASP2.asp?" & (photoID) & ">Click here to go to second ASP page</a>"
this link is a field photoID in a record read from a data base, displayed as a link, and then goes back in a "for-next" loop to read the next record.

So in other words you have something like the following...

<%
For i = 0 To AmountOfLinks
%>
     <a href="link1.asp?id=<%=rs("PhotoID")"%>link1</a>
<%
Next
%>
 

You want to pass PHOTOID into the session...

There's a number of ways you can do this.

If you send the PhotoID through the QueryString you could then pull it down on the next page, and simply set it into the Session.

Session("PhotoID") = Request.QueryString("PhotoId")

So if you have a set of 10 pages, put this at the top of each of them. That way, when the user clicks on any of your links, the photoid pertaining to that link is passed, pulled down on whichever page they click on, and then set into your session.

A more complicated way of doing it would be to have a hidden text field imbedded in your page that displays the links. When a user clicks one of the links a javascript could place the photoID in the text field (hidden from the user) and subsequently submit a form. On the next page you could Request.Form("iPhotoID") to retrieve it, and set it into a session variable.

An even more complicated way of doing it would be to write an AJAX function and invoke it using the OnClick event in javascript. The ajax would call an ASP script in the background and set the session id in a microfraction of a second whilst sending the user to the next page.

It depends on the scenario really.

[ernesto]

So in other words you have something like the following...

<%
For i = 0 To AmountOfLinks
%>
     <a href="link1.asp?id=<%=rs("PhotoID")"%>link1</a>
<%
Next
%>
 

You want to pass PHOTOID into the session...

There's a number of ways you can do this.

If you send the PhotoID through the QueryString you could then pull it down on the next page, and simply set it into the Session.

Session("PhotoID") = Request.QueryString("PhotoId")

So if you have a set of 10 pages, put this at the top of each of them. That way, when the user clicks on any of your links, the photoid pertaining to that link is passed, pulled down on whichever page they click on, and then set into your session.

A more complicated way of doing it would be to have a hidden text field imbedded in your page that displays the links. When a user clicks one of the links a javascript could place the photoID in the text field (hidden from the user) and subsequently submit a form. On the next page you could Request.Form("iPhotoID") to retrieve it, and set it into a session variable.

An even more complicated way of doing it would be to write an AJAX function and invoke it using the OnClick event in javascript. The ajax would call an ASP script in the background and set the session id in a microfraction of a second whilst sending the user to the next page.

It depends on the scenario really.

Thank you so much markrawlingson and jhardman for your help. My problem is solved. I was looking for an answer to my problem in the wrong place. Thanks again.
Ernesto