BSP: clear URL parameter

[Former Member]

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

[christine_evans]

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?

[Former Member]

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

[christine_evans]

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

[Former Member]

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

[christine_evans]

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.

[Former Member]

Hi Christine,

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

Thanks for your help,

Frank