4D View v16
PV ON ERROR
- 4D View Language
-
- PV Area
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- PV Area, Introduction
- PV Area to blob
- PV BLOB TO AREA
- PV DELETE OFFSCREEN AREA
- PV EXECUTE COMMAND
- PV Get area property
- PV GET COMMAND STATUS
- PV GET LAST ERROR
- PV Get on command method
- PV Get on error method
- PV Get on event method
- PV New offscreen area
- PV ON COMMAND
- PV ON ERROR
- PV ON EVENT
- PV REDRAW
- PV SCROLL AREA
- PV SET AREA PROPERTY
- PV SET COMMAND STATUS
PV ON ERROR
| PV ON ERROR ( method ) | ||||||||
| Parameter | Type | Description | ||||||
| method | String |
|
4D View method | |||||
The PV ON ERROR command installs the method to manage 4D View errors.
This interruption method is executed every time an error occurs during a 4D View command call, thereby allowing control of eventual execution errors.
The called method receives 3 parameters:
$1 : 4D View area reference
$2 : Error number
$3 : Error text
The numbers and the labels of errors generated by 4D View are provided in Appendix A, List of 4D View error codes.
To uninstall method, simply call the PV ON ERROR command with an empty string as a parameter.
Install an error management method for the active 4D View area.
If(PV Get on error method#"ErrMethMan") //Manager not installed?
PV ON ERROR("ErrMethMan") //Call method
End ifThe code for "ErrMethMan" is as follows:
C_LONGINT($1) //4D View area reference
C_LONGINT($2) //Error number
C_TEXT($3) //Error text
ALERT("Internal error number "+String(ErrorNum)+Char(13)+ErrorText)
Appendix A, List of 4D View error codes
PV GET LAST ERROR
PV Get on error method
Product: 4D View
Theme: PV Area
Number:
15860
Created: 4D View 6.8
4D View Language ( 4D View v16)
