Populating dropdown dynamically

Hi,

I have an arraylist(al) in which I have some values. I want to populate these values in my dropdown list. I have used the following code

Expand|Select|Wrap|Line Numbers

 <select name="select">

<%for(int i=0;i<al.size();i++){%>

<Option value="<%al.get(i);%>"><%=al.get(i)%></Option>

<%}%>

</select>

I gets populaated but when i want to print its value it shows blank.
Can anybody tell me the reason and some other alternative to populate the dropdown so that i can get the selected value.

Thanks

Oct 26 '07 #1

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17917

r035198x

13,262

8TB

Hi,

I have an arraylist(al) in which I have some values. I want to populate these values in my dropdown list. I have used the following code

Expand|Select|Wrap|Line Numbers

<select name="select">

<%for(int i=0;i<al.size();i++){%>

<Option value="<%al.get(i);%>"><%=al.get(i)%></Option>

<%}%>

</select>

I gets populaated but when i want to print its value it shows blank.
Can anybody tell me the reason and some other alternative to populate the dropdown so that i can get the selected value.

Thanks

Your value is not set properly.
You should have it as

Expand|Select|Wrap|Line Numbers

value="<%=al.get(i)%>"

Oct 26 '07 #2

itgaurav198

Your value is not set properly.
You should have it as

Expand|Select|Wrap|Line Numbers

value="<%=al.get(i)%>"

Hi,
Now i am able to display its value but when I want to get its value on a servlet that is called from this jsp it shows blank.

Please tell me the reason.

Thanks

Oct 26 '07 #3

r035198x

13,262

8TB

Hi,
Now i am able to display its value but when I want to get its value on a servlet that is called from this jsp it shows blank.

Please tell me the reason.

Thanks

How are you retrieving this value from the servlet?
Can you post the code that'd displaying the blank values?

Oct 26 '07 #4

itgaurav198

How are you retrieving this value from the servlet?
Can you post the code that'd displaying the blank values?

Hi,

I am using

Expand|Select|Wrap|Line Numbers

 String str=request.getParameter("name value od dropdown");

PrintWriter pw=response.getWriter();

pw.println("<html><body>");

pw.println(str);

pw.println("</body></html>");

Is it ok to get the selected value of dropdown using request.getParameter()?

Thanks

Oct 26 '07 #5

r035198x

13,262

8TB

Hi,

I am using

Expand|Select|Wrap|Line Numbers

String str=request.getParameter("name value od dropdown");

PrintWriter pw=response.getWriter();

pw.println("<html><body>");

pw.println(str);

pw.println("</body></html>");

Is it ok to get the selected value of dropdown using request.getParameter()?

Thanks

Yes it's OK (correct) to use request.getParameter for select values.
What is the name of the select that you are passing to the getParameter method? It has to match exactly (case sensitive) with the name that you used on your form for the select.
I also suggest that you change the name of your select from "select" to something else that describes the values stored by the select.

Oct 26 '07 #6

itgaurav198

Yes it's OK (correct) to use request.getParameter for select values.
What is the name of the select that you are passing to the getParameter method? It has to match exactly (case sensitive) with the name that you used on your form for the select.
I also suggest that you change the name of your select from "select" to something else that describes the values stored by the select.

Hi,
Thanx for ur response.
I am using the dropdown name as location.

Actually first i change one dropdown and call a servlet in which i fetch the values for another dropdown and passes it to the same jsp using request dispatcher.
But when i submit this jsp to another servlet i am not getting the values of fields.
Please help.

Thanks

Oct 26 '07 #7

r035198x

13,262

8TB

Hi,
Thanx for ur response.
I am using the dropdown name as location.

Actually first i change one dropdown and call a servlet in which i fetch the values for another dropdown and passes it to the same jsp using request dispatcher.
But when i submit this jsp to another servlet i am not getting the values of fields.
Please help.

Thanks

When you pass the values from the servlet to the JSP are they displaying properly on that JSP?

Oct 26 '07 #8

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