Purpose: - > To do error handling and correctly redirecting the error messages, System messages to the Respective screen.
- > Used to Capture SAP messages.
Syntax: onscreen 'SAPSCREEN'
enter ();
onmessage
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enter (); - Before going further, we need to know the working of goto label in order to Implement onmessage.
goto-label: goto label is used for altering the program flow in Liquid UI.
Syntax: goto labelname;
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labelname:
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--------------------- Note: • onmessage should be used after the onscreen/enter block.
• An Action is Needed to Exit out of the onmessage block Example: Below is the Example that Illustrates the Usage of onmessage.--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
onscreen 'SAPLIQS0.0100' set('F[Notification type]','&V[z_zguixt_notif]'); // Notification Type
enter();
onscreen 'SAPLIQS0.0100'
set('F[Functional loc.]','&V[z_Functionalloc]'); //Functional Location
set('F[VIQMEL-QMDAT]', '&V[z_date]'); //Date
enter();
onmessage
if (_message. substring(0,2)=='E:') { --------------------------------------------->If Error found then do the following
set('F[Functional loc.]',''); ----------------------------------------------------------->Setting the value to Empty
set('F[VIQMEL-QMDAT]',''); ---------------------------------------------------------->Setting the value to Empty
message(_message); ---------------------------------------------------------------->Displaying the Message
enter();
goto SCRIPT_END;-------------------------------------------------------------------->After Enter go to End of the Function
}
else
{
enter();--------------------------------------------------------------------------------->If it is not an Error then continue to the Script
}
onscreen 'SAPLIQS0.0100'
set('F[VIQMEL-QMTXT]', '&V[z_zguixt_Description]');
enter("=10\\TAB02");
set('F[Priority]', "&V[z_zguixt_priority]"); //Priority
enter("=10\\TAB04");
onscreen ''SAPLSPO1.0500'
enter("=OPT2");
set("F[VIQMEL-AUSWK]","&V[z_zguixt_effect]"); //Effect
enter("/11"); //Save
SCRIPT_END:;
}
Refer to the Attachment for Clarity.....
