Problem retrieving data from dynamic input field

li_ping · #1 (**permalink**) 12-31-06, 09:45 AM

How can I get the selected and entered values of a set of radio buttons, checkboxes and textbox? The names of the input fields are generated by using the value in the database and therefore the name is dynamic. I’m not sure of how I can get the values using JS. Any suggestion? The language I’m using is JSP.

Thanks.

King Coder · #2 (**permalink**) 12-31-06, 11:23 AM

The name being dynamic could pose a problem, but you *should* have the name stored somewhere. How are you dynamically creating the textfield names? If the names are all stored in an array, then you shouldn't have to many problems. You can retreive the value with getParmeter:

<%= request.getParameter("name") %>

li_ping · #3 (**permalink**) 01-01-07, 02:39 AM

I've tried to store the names in an array and it works but how can I pass the JSP array's values into a hidden input using JS? I've tried to store it but I didn't get any value.

li_ping · #4 (**permalink**) 01-01-07, 02:56 AM

FYI, I need to pass the names to servlet

King Coder · #5 (**permalink**) 01-01-07, 08:27 AM

Quote:

Originally Posted by li_ping

I've tried to store the names in an array and it works but how can I pass the JSP array's values into a hidden input using JS? I've tried to store it but I didn't get any value.

Why would you need javascript? Stick with JSP.

Quote:

FYI, I need to pass the names to servlet

<FORM METHOD=POST ACTION="http://localhost:8080/test/yourservlet">

Get the methods in the servlet via doPost()

li_ping · #6 (**permalink**) 01-01-07, 09:17 AM

I'm not sure on how I can pass the array from my JSP page to servlet.
I've tried <%= request.getParameter("name") %> but it returned null.
I've printed out the values in the array in JSP and made sure that there is some value in it.
I've tried the following in my doPost but to no avail:

Code:

    String name = "";
    String[] nm = new String[100];
    
    survey_id = req.getParameter("survey_id");
    System.out.println("servletParticipate.java.getParameter(): survey_id >>> " +survey_id);
    
    nm[0] = req.getParameter("name[0]");
    System.out.println("servletParticipate.java.getParameter(): nm >>> " +nm[0]);
    
    name = req.getParameter("name");
    System.out.println("servletParticipate.java.getParameter(): name >>> " +name);

Any idea on what's happening?
Thank you.