This document discusses displaying messages and alerts in Form Builder. It describes using built-in functions like ERROR_CODE and MESSAGE_TYPE to identify error types. Form Builder can display default, informative, and error messages. Alerts can be created and customized at runtime using properties and buttons to handle different responses from the user. Built-in functions like FORM_SUCCESS and FORM_FAILURE help test for success or failure.

1. Form Builder Messages and Alerts
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2. Objectives
• Default Messaging
• Identify Different Types of Messaging in Form Builder
• Create and control Alerts
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3. Displaying Messages to Operators
Messages
Application
Working
Informative
Error
Alerts
System
Application
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4. Errors and Built-ins
• Built-in failure does not cause an exception.
• Test built-in success with FORM_SUCCESS function.
• What went wrong?
– ERROR_CODE, ERROR_TEXT, ERROR_TYPE
– MESSAGE _CODE, MESSAGE _TEXT, MESSAGE _TYPE
Example: GO_BLOCK(‘EMP’);
IF FORM_SUCCESS THEN
EXECUTE_QUERY;
END IF;
FORM_FAILURE
FORM_FATAL
Returns TRUE OR
FALSE.
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5. Message Severity Level
>25
20
15
10
5
0
25
All (default)
More critical
Define by:
:SYSTEM.MESSAGE_LEVEL
Fatal Error
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6. Error Triggers
• On-Error Trigger
– Fires when system error message is issued. Built-ins to Use:
– Use ERROR_TYPE
– ERROR_CODE
– ERROR_TEXT
• On-Message Trigger
– Fires when informative message is issued. Built-ins to Use:
– MESSAGE_TYPE
– MESSAGE_CODE
– MESSAGE_TEXT
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7. Alerts Properties
Title
ALLERT_BUTTON1 ALLERT_BUTTON3ALLERT_BUTTON2
Alert Message Text
(Max 200 Characters)
Alert Style
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8. Showing Alerts
DECLARE
n Number;
BEGIN
n:=SHOW_ALERT(‘Del_Alert’);
IF n = ALERT_BUTTON1 THEN
DELETE_RECORD;
END IF;
END;
OR
IF SHOW_ALERT('DEL_ALERT‘) = ALERT_BUTTON1 THEN
DELETE_RECORD;
END IF;
NOTE: SHOW_ALERT Function Returns Number.
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9. Displaying Errors to an Alert
Changing the Alert Button Label:
SET_ALERT_BUTTON_PROPERTY(‘Err_Alert’,
ALERT_BUTTON1,
LABEL,’O.K’);
SET_ALERT_PROPERTY(’Err_Alert’,
ALERT_MESSAGE_TEXT, ERROR_TYPE||
’-’||TO_CHAR(ERROR_CODE)||
’: ’||ERROR_TEXT);
n := SHOW_ALERT(’Err_Alert’);
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10. Summary
• Displaying Messages in Form Builder
• Built-ins
– ERROR_CODE, ERROR_TYPE, ERROR_TEXT
– MESSAGE_CODE, MESSAGE_TYPE, MESSAGE_TEXT.
• Testing Built-ins with FORM_SUCCESS
• Alerts
• Setting alert Properties at runtime.
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