Xbase++ Requires Chilkat v11.7.0+

QR Code Numeric, Alphanumeric and Byte Modes

See more QR Code Examples

Demonstrates the QR encoding modes. Digits alone are stored in numeric mode, and text made only of digits, upper-case letters, space and $ % * + - . / : in alphanumeric mode. Both pack more characters into a symbol than byte mode, which is used for everything else. QrCode chooses the most compact mode the text allows, and the response reports it. A product code written in upper case therefore gives a smaller symbol than the same code in lower case. Xbase++

LOCAL nSuccess
LOCAL oFmt
LOCAL oJson
LOCAL oJsonOut

nSuccess := 0

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

oFmt := CreateObject("Chilkat.Formats")
oJson := CreateObject("Chilkat.JsonObject")
oJsonOut := CreateObject("Chilkat.JsonObject")

//  Digits only.
oJson:UpdateString("payload.text", "00123456789012345678")
nSuccess := oFmt:QrCode("generate", oJson, oJsonOut)
IF (nSuccess == 0)
    ? oFmt:LastErrorText
    oFmt:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

? "digits: mode " + oJsonOut:StringOf("symbols[0].selectedEncoding.mode") + ", version " + Str(oJsonOut:IntOf("symbols[0].selectedEncoding.version"))

//  Upper-case letters, digits, space and - are all in the alphanumeric set.
oJson:UpdateString("payload.text", "ORDER-12345 LOT A7 SHELF 12-C")
nSuccess := oFmt:QrCode("generate", oJson, oJsonOut)
IF (nSuccess == 0)
    ? oFmt:LastErrorText
    oFmt:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

? "upper case: mode " + oJsonOut:StringOf("symbols[0].selectedEncoding.mode") + ", version " + Str(oJsonOut:IntOf("symbols[0].selectedEncoding.version"))

//  Lower-case letters are not, so the same text in lower case needs byte mode.
oJson:UpdateString("payload.text", "order-12345 lot a7 shelf 12-c")
nSuccess := oFmt:QrCode("generate", oJson, oJsonOut)
IF (nSuccess == 0)
    ? oFmt:LastErrorText
    oFmt:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

? "lower case: mode " + oJsonOut:StringOf("symbols[0].selectedEncoding.mode") + ", version " + Str(oJsonOut:IntOf("symbols[0].selectedEncoding.version"))

//  The mode can be named.  Byte mode can hold any text.  Naming a mode the text cannot use
//  (numeric for text with letters, for example) fails with conflictingOptions.
oJson:UpdateString("payload.text", "00123456789012345678")
oJson:UpdateString("encoding.qr.mode", "byte")
nSuccess := oFmt:QrCode("generate", oJson, oJsonOut)
IF (nSuccess == 0)
    ? oFmt:LastErrorText
    oFmt:destroy()
    oJson:destroy()
    oJsonOut:destroy()
    RETURN
ENDIF

? "digits as bytes: mode " + oJsonOut:StringOf("symbols[0].selectedEncoding.mode") + ", version " + Str(oJsonOut:IntOf("symbols[0].selectedEncoding.version"))

//  The four symbols, in the order they were made:

//  

//  Sample output:

//  digits: mode numeric, version 1
//  upper case: mode alphanumeric, version 2
//  lower case: mode byte, version 3
//  digits as bytes: mode byte, version 2

oFmt:destroy()
oJson:destroy()
oJsonOut:destroy()