saving the details in when i click next and previous buttons

[kesava chaitanya]

hi

in my application i have one scenario like this

i will create 3 rows like this

eno ename sal
textbox textbox textbox
textbox textbox textbox
textbox textbox textbox

Next



eno ename sal
textbox textbox textbox
textbox textbox textbox
textbox textbox textbox

Previous

i will enter details in textboxes and then i will click next button
i will call same page again this time i will enter details in 3 rows again like i did previously this time i will put Previous button when i click previous button The details be populated in the first that i have entered in the first page and when i click next button the details should be displayed that i have entered in the second page;

How can i do this any idea??

[Balan Raj]

Name your textboxes in a fashion that they do not over-write when the pages change.
Prefix the page number to the fields, so on submit, u can submit the form & the bean can save it in some data structure & store it in session with the key as the page number.

when u get back to the page, try to see if the session has the value for a given page number, if yes, get the values & populate the text fields, if not, show them blank

doesnt seem too complicated for me

[kesava chaitanya]

hi balram

can u elaborate bit more i didnt understand completely;

[Balan Raj]

Donno which part was unclear, I'll try to restate what I said,probably with more clarity

Name your textboxes in a fashion that they do not over-write when the pages change. Prefix the page number to the fields, so on submit, u can submit the form & the bean can save it in some data structure & store it in session with the key as the page number.

In your JSP, make sure the text boxes are not having harcoded names.
They would look something like :

 
row 1
<input type=text name="mytextbox00_<%=pageNumber%>" value ="" >
<input type=text name="mytextbox01_<%=pageNumber%>" value ="" >
<input type=text name="mytextbox02_<%=pageNumber%>" value ="" >
 
row 2
<input type=text name="mytextbox11_<%=pageNumber%>" value ="" >
<input type=text name="mytextbox12_<%=pageNumber%>" value ="" >
<input type=text name="mytextbox13_<%=pageNumber%>" value ="" >
 
<input type=hidden name="pageNumber" value = "<%=pageNumber%>">
<input type=hidden name="rows" value = "<%=rows%>">
<input type=hidden name="cols" value = "<%=cols%>">
 

When you submit the form,
in your bean you will iterate throught the request & collect the matrix of the form data into some kind of 2 dimensional array.

String pageNumber = request.getParameter("pageNumber");
String rows= request.getParameter("rows");
String cols= request.getParameter("cols");

//NOTE : convert row & col to integers
iterate rows :
iterate cols :
formData[rowItr][colItr] = request.getParameter("mytextbox+<%=row+col+"_"+pageNumber%>");

So u loop thru & get all the form elements into the 2d array.

Now put that into session, with a simple
session.putValue("myFormDataForPage"+pageNumber, formData);

Now, comes the intersting part of setting the values..
your form will post to itself, with the correct pageNumber incremented or decremented.
So, I will rewrite my input box with something like

In the JSP
// Try to get the array from session,
 formData = session.get("myFormDataForPage"+pageNumber);
if null, then all elemens are blnked.
 
if there is value, set it to the appropriate text field.
you need to manipulate it appropriately
 
<input type=text name="mytextbox11_<%=pageNumber%>" value ="<%=formData[1][1]%>" >

Well, hope this helps

[kesava chaitanya]

thank u for ur reply