C Requires Chilkat v11.7.0+

Create a vCard (Contact) QR Code

See more QR Code Examples

Demonstrates a QR code that adds a contact to a phone when scanned. The text is a vCard, the standard format for contact details: lines between BEGIN:VCARD and END:VCARD, each ending with CRLF. A vCard is fairly long, so the symbol is larger than one holding a web address. Leave out the fields that are not needed to keep it small. C

#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>
#include <C_CkFormats.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkStringBuilder sbCard;
    HCkJsonObject json;
    HCkFormats fmt;
    HCkJsonObject jsonOut;

    success = FALSE;

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

    //  The second argument of AppendLine is cktrue to end each line with CRLF.
    sbCard = CkStringBuilder_Create();
    CkStringBuilder_AppendLine(sbCard,"BEGIN:VCARD",TRUE);
    CkStringBuilder_AppendLine(sbCard,"VERSION:3.0",TRUE);
    CkStringBuilder_AppendLine(sbCard,"N:Smith;Alex;;;",TRUE);
    CkStringBuilder_AppendLine(sbCard,"FN:Alex Smith",TRUE);
    CkStringBuilder_AppendLine(sbCard,"ORG:Example Company",TRUE);
    CkStringBuilder_AppendLine(sbCard,"TITLE:Sales Manager",TRUE);
    CkStringBuilder_AppendLine(sbCard,"TEL;TYPE=CELL:+1-555-0100",TRUE);
    CkStringBuilder_AppendLine(sbCard,"EMAIL:alex.smith@example.com",TRUE);
    CkStringBuilder_AppendLine(sbCard,"URL:https://www.example.com",TRUE);
    CkStringBuilder_AppendLine(sbCard,"END:VCARD",TRUE);

    json = CkJsonObject_Create();
    CkJsonObject_UpdateSb(json,"payload.text",sbCard);
    CkJsonObject_UpdateInt(json,"render.moduleSize",6);
    CkJsonObject_UpdateString(json,"output.path","qa_output/qr_vcard.png");
    CkJsonObject_UpdateBool(json,"output.overwrite",TRUE);
    CkJsonObject_UpdateString(json,"output.return","none");

    fmt = CkFormats_Create();
    jsonOut = CkJsonObject_Create();
    success = CkFormats_QrCode(fmt,"generate",json,jsonOut);
    if (success == FALSE) {
        printf("%s\n",CkFormats_lastErrorText(fmt));
        CkStringBuilder_Dispose(sbCard);
        CkJsonObject_Dispose(json);
        CkFormats_Dispose(fmt);
        CkJsonObject_Dispose(jsonOut);
        return;
    }

    printf("vCard length: %d\n",CkStringBuilder_getLength(sbCard));
    printf("QR version: %d\n",CkJsonObject_IntOf(jsonOut,"symbols[0].selectedEncoding.version"));
    printf("modules: %d x %d\n",CkJsonObject_IntOf(jsonOut,"symbols[0].dimensions.modulesWide"),CkJsonObject_IntOf(jsonOut,"symbols[0].dimensions.modulesHigh"));
    printf("image: %d x %d pixels\n",CkJsonObject_IntOf(jsonOut,"outputs[0].width"),CkJsonObject_IntOf(jsonOut,"outputs[0].height"));

    //  The image written to qa_output/qr_vcard.png:

    //  

    //  Sample output:

    //  vCard length: 197
    //  QR version: 10
    //  modules: 57 x 57
    //  image: 390 x 390 pixels


    CkStringBuilder_Dispose(sbCard);
    CkJsonObject_Dispose(json);
    CkFormats_Dispose(fmt);
    CkJsonObject_Dispose(jsonOut);

    }