Populating dropdown dynamically

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • itgaurav198
    New Member
    • Oct 2007
    • 41
    #1

    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


    Code:
    <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
    Tags: None
    • r035198x
      MVP
      • Sep 2006
      • 13225
      #2
      Originally posted by itgaurav198
      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


      Code:
      <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 [CODE=java]value="<%=al.ge t(i)%>"[/CODE]

        Comment

        • itgaurav198
          New Member
          • Oct 2007
          • 41
          #3
          Originally posted by r035198x
          Your value is not set properly.
          You should have it as [CODE=java]value="<%=al.ge t(i)%>"[/CODE]
          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

            Comment

            • r035198x
              MVP
              • Sep 2006
              • 13225
              #4
              Originally posted by itgaurav198
              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?

                Comment

                • itgaurav198
                  New Member
                  • Oct 2007
                  • 41
                  #5
                  Originally posted by r035198x
                  How are you retrieving this value from the servlet?
                  Can you post the code that'd displaying the blank values?
                  Hi,

                  I am using

                  Code:
                  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.getPara meter()?

                  Thanks

                    Comment

                    • r035198x
                      MVP
                      • Sep 2006
                      • 13225
                      #6
                      Originally posted by itgaurav198
                      Hi,

                      I am using

                      Code:
                      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.getPara meter()?

                      Thanks
                      Yes it's OK (correct) to use request.getPara meter 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.

                        Comment

                        • itgaurav198
                          New Member
                          • Oct 2007
                          • 41
                          #7
                          Originally posted by r035198x
                          Yes it's OK (correct) to use request.getPara meter 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

                            Comment

                            • r035198x
                              MVP
                              • Sep 2006
                              • 13225
                              #8
                              Originally posted by itgaurav198
                              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?

                                Comment

                                Previous template Next
                                Working...