BBjRecordSet::previous

Description

In BBj 4.0 and higher, this method moves to the previous record of a BBjRecordSet.

Syntax

Return Value

Method

void

previous()

Parameters

None.

Return Value

Moves the BBjRecordSet pointer to the previous record.

Remarks

Calling this method when the BBjRecordSet isEmpty or is already positioned at the first record generates an !ERROR=2 - End of File.

Example

REM ' Move RecordSet pointer to the previous record

REM ' First, create a data file
FILENAME$="BBjRecordSet.dat"
MODES$=""
TEMPLATE$="STATE:C(2),NAME:C(16*=)"
erase FILENAME$,err=*next
mkeyed FILENAME$,2,0,32
channel=unt
open (channel)FILENAME$
dim REC$:TEMPLATE$

REM ' Load the file with state codes and names
while 1
dread rec.state$,rec.name$,END=*break
write record (channel,KEY=rec.state$)rec$
wend
close (channel)

REM ' Create a file-based BBjRecordSet
RecordSet! = BBJAPI().createFileRecordSet(FILENAME$,MODES$,TEMPLATE$)

REM ' Go to the second-to-last record
RecordSet!.last()
RecordSet!.previous()

REM ' Retrieve the RecordData for the current record
RecordData! = RecordSet!.getCurrentRecordData()

REM ' Print the RecordData
print "The second-to-last record is:",'LF',RecordData!,

stop

DATA "AK","Alaska"
DATA "AL","Alabama"
DATA "AR","Arkansas"
DATA "AZ","Arizona"
DATA "CA","California"
DATA "CO","Colorado"
DATA "CT","Connecticut"
DATA "DC","District of Columbia"
DATA "DE","Delaware"
DATA "FL","Florida"
DATA "GA","Georgia"
DATA "GU","Guam"
DATA "HI","Hawaii"
DATA "IA","Iowa"
DATA "ID","Idaho"
DATA "IL","Illinois"
DATA "IN","Indiana"
DATA "KS","Kansas"
DATA "KY","Kentucky"
DATA "LA","Louisiana"
DATA "MA","Massachusetts"
DATA "MD","Maryland"
DATA "ME","Maine"
DATA "MI","Michigan"
DATA "MN","Minnesota"
DATA "MO","Missouri"
DATA "MS","Mississippi"
DATA "MT","Montana"
DATA "NC","North Carolina"
DATA "ND","North Dakota"
DATA "NE","Nebraska"
DATA "NH","New Hampshire"
DATA "NJ","New Jersey"
DATA "NM","New Mexico"
DATA "NV","Nevada"
DATA "NY","New York"
DATA "OH","Ohio"
DATA "OK","Oklahoma"
DATA "OR","Oregon"
DATA "PA","Pennsylvania"
DATA "PR","Puerto Rico"
DATA "RI","Rhode Island"
DATA "SC","South Carolina"
DATA "SD","South Dakota"
DATA "TN","Tennessee"
DATA "TX","Texas"
DATA "UT","Utah"
DATA "VA","Virginia"
DATA "VI","Virgin Islands"
DATA "VT","Vermont"
DATA "WA","Washington"
DATA "WI","Wisconsin"
DATA "WV","West Virginia"
DATA "WY","Wyoming"

See Also

BBjAPI

See the BBj Object Diagram for an illustration of the relationship between BBj Objects.



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