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Simtel MSDOS 1992 December
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simtel1292_SIMTEL_1292_Walnut_Creek.iso
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msdos
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clipper
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nannws34.arc
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CONORDER.PRG
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1989-01-01
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1KB
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62 lines
* Program: Conorder.prg
* Author: Diane Lask
* Version: Clipper Summer '87
* Note(s): Tests and demonstrates the use of
* conditionally-ordered indexing.
*
* Copyright (c) 1988 Nantucket Corp.
* Create a character memory variable to hold your condition.
condition = "Confield = 'EDIT' "
* Create a temporary database definition with 2 fields:
* Keyfield: a character field of length 10
* Confield: a character field of length 10
CREATE Temp
APPEND BLANK
REPLACE Field_name WITH 'Keyfield'
REPLACE Field_type WITH 'C'
REPLACE Field_len WITH 10
APPEND BLANK
REPLACE Field_name WITH 'Confield'
REPLACE Field_type WITH 'C'
REPLACE Field_len WITH 10
CLOSE
* Create a database from the definition file.
CREATE Conorder FROM Temp
ERASE Temp.dbf
USE Conorder
* Set up the Index expression.
APPEND BLANK
INDEX ON (IF(&condition, CHR(0) + Keyfield, Keyfield + CHR(0)));
TO Conorder
DO WHILE .T.
CLEAR
APPEND BLANK
@ 10, 5 SAY 'Enter a Keyfield'
@ 10, 60 GET Keyfield PICTURE '@!'
@ 12, 5 SAY 'Enter the Condition Field '
@ 13, 5 SAY 'Type "EDIT" to include in database'
@ 14, 5 SAY 'Type "QUIT" to quit program and list database'
@ 14, 60 GET Confield PICTURE '@!'
READ
IF Confield = 'QUIT'
QUIT
ENDIF
@ 16, 5 SAY 'Press Any Key To Display Database Records '
INKEY(0)
GOTO TOP
LIST Keyfield, Confield
INKEY(0)
ENDDO