HTMLB- Button Event CASE Dyn Nav problem

Question

Hi,
I am prototyping a solution in BSP which has a page with two buttons at the bottom, a BACK button and a SUBMIT button which both send the User to different pages, and I can't make the re-directs work.
I am trying to stick to HTMLB and not get lazy and use HTML.
I have a page call it page1.htm, at the bottom there is a submit button and back button with htmlb code as follows:
<htmlb:button       text         = "Back"
                    onClick      = "event_1" />
<htmlb:button       text         = "Submit Request"
                    onClick      = "event_2" />
in the EVENT HANDLER for the OnInputProcessing Event I have the following CASE statement:
CASE event_id.
  WHEN 'event_1':.
  navigation->goto_page( 'default.htm' ).
  WHEN 'event_2':.
  navigation->goto_page( 'submitresult.htm' ).
ENDCASE.
the idea is that when the BACK button is pressed the OnInputProcessing event handler will pick this up and using the value of the EVENT_ID which can be either event_1 or event_2 the CASE statement will re-direct the User to the correct page.
Problem -> it doesn't work.
Does anyone have any ideas where I am going wrong.
Thanks for your time,
Milan.

Answer 1

Hallo Milan, (interesting name, English?)
Somehow we are just overlooking something. I quickly built a very small cut-and-paste example.
Create a new BSP application, and add into it three pages called page1.htm, page2.htm and page3.htm. The source is below. (Note all three has the same event handler:).
<b><u>onInputProcessing for all three pages</u></b>
DATA: event TYPE REF TO if_htmlb_data.
event = cl_htmlb_manager=>get_event_ex( request ).
IF event IS NOT INITIAL AND event->event_name = 'button'.
  navigation->goto_page( event->event_server_name ).
ENDIF.
<b><u>page1.htm</u></b>
<%@page language="abap" otrTrim="true"%>
<%@extension name="htmlb" prefix="htmlb"%>
<htmlb:content design="design2003">
  <htmlb:page>
    <htmlb:form>
      <htmlb:button       text          = "Page 2"
                          design        = "NEXT"
                          onClick       = "page2.htm" />
    </htmlb:form>
  </htmlb:page>
</htmlb:content>
<b><u>page2.htm</u></b>
<%@page language="abap" otrTrim="true"%>
<%@extension name="htmlb" prefix="htmlb"%>
<htmlb:content design="design2003">
  <htmlb:page>
    <htmlb:form>
      <htmlb:button       text          = "Page 1"
                          design        = "PREVIOUS"
                          onClick       = "page1.htm" />
      <htmlb:button       text          = "Page 3"
                          design        = "NEXT"
                          onClick       = "page3.htm" />
    </htmlb:form>
  </htmlb:page>
</htmlb:content>
<b><u>page3.htm</u></b>
<%@page language="abap" otrTrim="true"%>
<%@extension name="htmlb" prefix="htmlb"%>
<htmlb:content design="design2003">
  <htmlb:page>
    <htmlb:form>
      <htmlb:button       text          = "Page 2"
                          design        = "PREVIOUS"
                          onClick       = "page2.htm" />
    </htmlb:form>
  </htmlb:page>
</htmlb:content>
I highly recommend to run this in design2003. You will love that PREVIOUS/NEXT design on the buttons. If this example is not working for you, there are a few other things to be checked. But first try this.
++bcm