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OrigChanged()
Check for change in the origin of all the gets (MASTERVAR clause).
------------------------------------------------------------------------------
Syntax:
OrigChanged() --> <lChanged>
Returns:
OrigChanged() returns a logical indicating if the any of the variables
specified with the MASTERVAR clause have changed. The intention of this
function is to allow a check of originating fields in a database against
changes. In an object environment RLOCKS() are not performed until
update time. If the original data in the databases have changed we
must inform our user and act according to his/her reaction.
Example:
The following example ALERTs the user if data has changed prior to
updating the data base.
LOCAL cName := CLIENT->NAME
LOCAL nAge := CLIENT->AGE
LOCAL lBackDoor
@ 10, 10 SAY "Name:" GET cName ORIGIN { || CLIENT->NAME }
@ 11, 10 SAY "Age: " GET nAge ORIGIN { || CLIENT->AGE }
READ
IF Updated() .AND. !__KillRead()
lBackDoor := OrigChanged()
IF !lBackDoor .OR. ;
( Alert( "Data Record Has Been Changed By Another User.;" + ;
"Overwrite Their Changes?", { "No", "Yes" }, , .T. ) == 2 )
WHILE !RLOCK() ; END
CLIENT->NAME := cName
CLIENT->AGE := nAge
COMMIT
UNLOCK
ENDIF
ENDIF
Files: Library is CUACLIP.LIB.
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