topic Re: BSP: clear URL parameter in Application Development and Automation Discussions

BSP: clear URL parameter

Former Member — Wed, 14 Jan 2009 09:33:26 GMT

Hi,

in my BSP application I want to give a value from one controller to the following one. To do so, I set a parameter to the navigation object, and read it in the subsequent controller.


* Controller A, do_handle_event
navigation->set_parameter( name = 'key' value = model->guid ).
navigation->next_page( co_exit_show ).
* Controller B, do_request
guid = request->get_form_field( 'key' ).

This part works fine. The problem is that the parameter once set to the navigation object in controller A will be part of all subsequent requests to controller B. So, how do I get rid of the parameter, so that it is only part of the first request to controller B, similar to Java's request.setParameter()?

Thanks in advance,

Frank

Re: BSP: clear URL parameter

christine_evans — Wed, 14 Jan 2009 10:45:57 GMT

In all types of screens, once I've received a parameter into a variable I usually reset it to SPACE. Is this what you mean?

Re: BSP: clear URL parameter

Former Member — Wed, 14 Jan 2009 12:56:21 GMT

Hi Christine,

in a way, yes, this is want I want to do. However, doing so seems to be quite complicated. I've already tried the following:


* Controller B
navigation->set_parameter( NAME = CO_PARAM_GUID value = space ).
request->set_form_field( NAME = CO_PARAM_GUID value = space ).
response->set_form_field( NAME = CO_PARAM_GUID value = space ).

None of them solved the problem. When the controller is called again, request->get_form_field( CO_PARAM_GUID ) contains the originally provided value.

Any ideas?

Best regards,

Frank

Re: BSP: clear URL parameter

christine_evans — Wed, 14 Jan 2009 13:12:00 GMT

I must admit I've never actually done this. But have you tried using the controller method INSTANTIATE_PARAMETER?

Re: BSP: clear URL parameter

Former Member — Wed, 14 Jan 2009 13:58:39 GMT

Hi Christine,

this doesn't seem to be the right place to do this. If I understand the comment in INSTANTIATE_PARAMETERS right, this method should be used to deserialize complex data. In fact, the comment says

Strings should not be instantiated by this method

Best regards,

Frank

Re: BSP: clear URL parameter

christine_evans — Thu, 15 Jan 2009 10:16:11 GMT

It was just a shot in the dark really. I think you might be better off posting in the BSP forum which you will find in the list of forums under Application Server.

Re: BSP: clear URL parameter

Former Member — Thu, 15 Jan 2009 10:35:29 GMT

Hi Christine,

you are right, I opened a new thread in the BSP forum: ...

Thanks for your help,

Frank