Go 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. Go

    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 := chilkat.NewStringBuilder()
    sbCard.AppendLine("BEGIN:VCARD",true)
    sbCard.AppendLine("VERSION:3.0",true)
    sbCard.AppendLine("N:Smith;Alex;;;",true)
    sbCard.AppendLine("FN:Alex Smith",true)
    sbCard.AppendLine("ORG:Example Company",true)
    sbCard.AppendLine("TITLE:Sales Manager",true)
    sbCard.AppendLine("TEL;TYPE=CELL:+1-555-0100",true)
    sbCard.AppendLine("EMAIL:alex.smith@example.com",true)
    sbCard.AppendLine("URL:https://www.example.com",true)
    sbCard.AppendLine("END:VCARD",true)

    json := chilkat.NewJsonObject()
    json.UpdateSb("payload.text",sbCard)
    json.UpdateInt("render.moduleSize",6)
    json.UpdateString("output.path","qa_output/qr_vcard.png")
    json.UpdateBool("output.overwrite",true)
    json.UpdateString("output.return","none")

    fmt := chilkat.NewFormats()
    jsonOut := chilkat.NewJsonObject()
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        sbCard.DisposeStringBuilder()
        json.DisposeJsonObject()
        fmt.DisposeFormats()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("vCard length: ", sbCard.Length())
    fmt.Println("QR version: ", jsonOut.IntOf("symbols[0].selectedEncoding.version"))
    fmt.Println("modules: ", jsonOut.IntOf("symbols[0].dimensions.modulesWide"), " x ", jsonOut.IntOf("symbols[0].dimensions.modulesHigh"))
    fmt.Println("image: ", jsonOut.IntOf("outputs[0].width"), " x ", jsonOut.IntOf("outputs[0].height"), " pixels")

    //  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

    sbCard.DisposeStringBuilder()
    json.DisposeJsonObject()
    fmt.DisposeFormats()
    jsonOut.DisposeJsonObject()