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WHEN PAGE SUBMITS how to retrieve checked value in servlet;;selected radio button value should come in servlet

Posted on 2006-10-30
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Last Modified: 2011-09-20
for(int i=0;i<list.size();i++)
{
<td><input type="radio" id="empCheck<%=i%>" name="empCheck" onClick="selectEmp('<%=empHeader.empId%>',<%=i%>)"></td>
<td><input type=hidden id='empId<%=i%>' name="empId" value='<%= empHeader.empId%>'> </td>
}
function selectEmp(refId,i)
{
     
     if(document.getElementById('empCheck'+i).checked)
          document.getElementById('empId'+i).value=refId;
     else
          document.getElementById('empId'+i).value="";    
     var len=document.forms[0].empId.length;

   for(var i=0;i<len;i++)
   {
    if(document.forms[0].empId[i].checked  == true)  
    document.getElementById('empId'+i).value=refId;
   }

   
}

function ex()
                        {
                        Url      =      'empservlet';
                              document.forms[0].action = Url;
                        
                        document.forms[0].submit();
                        }

<input type="button" name="b1" VALUE="submit" class = 'input' onClick="ex()">

                        
WHEN PAGE SUBMITS how to retrieve checked value in servlet;;selected radio button value should come in servlet.

if i use request.getParameter("empId") then " " is coming and if i use request.getParameterValues("empId") all values r coming instead of checked one.



see this another sample jsp;

second_page.jsp

from the DB iterate the loop and display the results.presently i hardcoded the values.

when user clicked particular radio button its empId and corresponding empseqno values should come ..

<script>

function ex()
{
                        Url      =      'second_page.jsp';
                        document.forms[0].action = Url;
                        document.forms[0].submit();
}
</script>

<form action="second_page.jsp" method="post">
<table border="0" width="820" cellpadding="2" cellspacing="1" >
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId" name="empId" value="11111">111111
<input type="hidden" id="empseqno" name="empseqno" value="aaaa">
</td>
</tr>
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId" name="empId" value="222222">22222
<input type="hidden" id="empseqno" name="empseqno" value="bbbb">
</td>
</tr>

</table>
<input type="button" value="Submit" onclick="ex()">

</form>


At second_page.jsp, you do this to retrieve and display:

<%
out.println(request.getParameter("empId"));
out.println(request.getParameter("empseqno"));

%>


0
Comment
Question by:chaitu chaitu
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9 Comments
 
LVL 9

Expert Comment

by:matthew016
ID: 17838321
Use attribute value in your html :

<input value="M" name="gender" type="radio">Male
<input value="F" name="gender" type="radio">Female

And in your servlet the usual thing :

String sexe = request.getParameter("gender");

U will retrieve the value of attribute value

0
 
LVL 20

Author Comment

by:chaitu chaitu
ID: 17839842
see this another sample jsp;



from the DB iterate the loop and display the results.presently i hardcoded the values.

when user clicked particular radio button its empId and corresponding empseqno values should come ..

second_page.jsp
*************
<script>

function ex()
{
                    Url     =     'second_page.jsp';
                    document.forms[0].action = Url;
                    document.forms[0].submit();
}
</script>

<form action="second_page.jsp" method="post">
<table border="0" width="820" cellpadding="2" cellspacing="1" >
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId" name="empId" value="11111">111111
<input type="hidden" id="empseqno" name="empseqno" value="aaaa">
</td>
</tr>
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId" name="empId" value="222222">22222
<input type="hidden" id="empseqno" name="empseqno" value="bbbb">
</td>
</tr>

</table>
<input type="button" value="Submit" onclick="ex()">

</form>


At second_page.jsp, you do this to retrieve and display:

<%
out.println(request.getParameter("empId"));
out.println(request.getParameter("empseqno"));

%>
0
 
LVL 9

Expert Comment

by:matthew016
ID: 17840986
the value of empId is ok now ?
0
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LVL 20

Author Comment

by:chaitu chaitu
ID: 17841160
its ok but corresponding empseqno how will i get??
0
 
LVL 19

Expert Comment

by:Kuldeepchaturvedi
ID: 17844585
you will have to change the names of hidden fields as well, otherwise you will keep on getting all the values..

<form action="second_page.jsp" method="post">
<table border="0" width="820" cellpadding="2" cellspacing="1" >
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId1" name="empId1" value="11111">111111
<input type="hidden" id="empseqno1" name="empseqno1" value="aaaa">
</td>
</tr>
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId2" name="empId2" value="222222">22222
<input type="hidden" id="empseqno2" name="empseqno2" value="bbbb">
</td>
</tr>

in your servlet
if(request.getParemeter("empId1")!=null)
request.getParameter("empseqno2");
you can get all the parameter names in a enumeration and iterate it thru to make it generic
0
 
LVL 20

Author Comment

by:chaitu chaitu
ID: 17847865
how do i know that which radio button value is clicked??

execute the below sample jsp;

this is a sample jsp ;when i select one radio button and enter submit how to capture the empNO to the corresponding empId;

<script>

function ex()
{
                    Url     =     'second_page.jsp';
                    document.forms[0].action = Url;
                    document.forms[0].submit();
}
</script>

<form action="second_page.jsp" method="post">
<table border="0" width="820" cellpadding="2" cellspacing="1" >

<%
for(int i=0;i<10;i++)
{%>
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId<%=i%>" name="empId" value="<%=i%>"><%=i%>
<input type="hidden" id="empNO<%=i%>" name="empNO" value="AAA<%=i%>">
</td>
</tr>
<%}%>

</table>
<input type="button" value="Submit" onclick="ex()">

</form>


At second_page.jsp, you do this to retrieve and display:

<%
out.println(request.getParameter("empId"));
out.println(request.getParameter("empNO"));

%>

0
 
LVL 19

Accepted Solution

by:
Kuldeepchaturvedi earned 500 total points
ID: 17849224
for(int i=0;i<10;i++)
{%>
<tr class='formheader' align=center>
<td>
<input type="radio" id="empId<%=i%>" name="empId<%=i%>" value="<%=i%>"><%=i%>
<input type="hidden" id="empNO<%=i%>" name="empNO<%=i%>" value="AAA<%=i%>">
</td>
</tr>
<%}%>

</table>
<input type="button" value="Submit" onclick="ex()">

</form>


At second_page.jsp, you do this to retrieve and display:

<%
for(int i=0;i<10;i++)
{
if(request.getParameter("empId"+i)!=null)
{
out.println(request.getParameter("empId"+i));
out.println(request.getParameter("empNO"+i));
}
}

%>
0
 
LVL 20

Author Comment

by:chaitu chaitu
ID: 17849292
with the above code i will get all empid's not exactly checked one
0
 
LVL 19

Expert Comment

by:Kuldeepchaturvedi
ID: 17849302
unless the radio button is checked, the value is not sent to the server... so rest all you empid values will be null... thats why I have placed that if condition in the loop
0

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