Messages in Web DYNPRO

Question

Hi Gurus,
Can anybody help me to learn different types of messaging in Web Dynpro?
And some links to learn all about messaging in web dynpro.

Answer 1

Dear Veera
There are two ways to define where messages are to be displayed on the screen:
1. The default position of the message area is on top of the page. If this position
is fine, the developer does not have do anything.
2. If a position different from the default message area position is desired,
the MessageArea container UI element has to be used. A MessageArea UI
element can be defined as a sub-element of all other container elements.
Message Handling
In the Web Dynpro application, you can set the way messages are displayed. On
the Properties tab of a Web Dynpro application, message handling can be defined
by setting the radio button to the following values:
• Show Message Component on Demand
If at least one message is reported, the message area is displayed in a
group-box style. The message area contains the last message and information
about the number of messages reported in total. In addition, a button is
displayed, allowing the user to display all messages in a list. Messages
related to UI elements are displayed as links. Selecting such a link navigates
to the UI element related to the message.
• Always Display Message Component
In addition to the behavior described above, the message area is also
displayed if no message is reported.
• Display Messages Without Message Component
All messages reported are displayed in the message area. This area does not
have a group-box style, but it is transparent. All messages are displayed
at once; no extra navigation is required to obtain the list of all messages.
Messages related to UI elements are displayed as links. Selecting such a link
navigates to the UI element related to the message.
Methods for Defining Messages:
In order to report a message, methods of the IF_WD_MESSAGE_MANAGER
interface have to be used. The Web Dynpro runtime automatically instantiates a
class implementing this interface. The reference to this class can be obtained from
the self reference WD_THIS, using the expressions:
r_api = wd_this->wd_get_api().
r_mmanager = r_api->get_message_manager().
Methods
REPORT_ATTRIBUTE_ERROR_MESSAGE (Parameter PARAMS)
REPORT_SUCCESS (Parameter PARAMS)
REPORT_WARNING (Parameter PARAMS)
REPORT_ERROR_MESSAGE (Parameter PARAMS)
REPORT_FATAL_ERROR_MESSAGE (Parameter PARAMS)
REPORT_ATTRIBUTE_EXCEPTION NO (Parameters ELEMENT, ATTRIBUTE_NAME)
REPORT_FATAL_EXCEPTION
REPORT_ATTRIBUTE_T100_MESSAGE (Parameters P1, P2, P3, P4)
REPORT_T100_MESSAGE (Parameters P1, P2, P3, P4)