Go Requires Chilkat v11.7.0+

QR Codes for Email, Phone, SMS and Location

See more QR Code Examples

Demonstrates QR codes that start an action on a phone. A QR code only holds text, and what happens on scanning depends on the form of that text: mailto: starts an email, tel: dials a number, SMSTO: starts a text message, and geo: opens a map at a latitude and longitude. A web address opens in the browser. Go

    success := false

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

    fmt := chilkat.NewFormats()
    json := chilkat.NewJsonObject()
    jsonOut := chilkat.NewJsonObject()
    json.UpdateInt("render.moduleSize",6)
    json.UpdateBool("output.overwrite",true)
    json.UpdateString("output.return","none")

    //  An email, with the address and optionally a subject.  Spaces in the subject are written %20.
    json.UpdateString("payload.text","mailto:support@example.com?subject=Order%2012345")
    json.UpdateString("output.path","qa_output/qr_email.png")
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        fmt.DisposeFormats()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("email: version ", jsonOut.IntOf("symbols[0].selectedEncoding.version"), ", ", *jsonOut.StringOf("outputs[0].path"))

    //  

    //  A phone number to dial, in international form.
    json.UpdateString("payload.text","tel:+15555550100")
    json.UpdateString("output.path","qa_output/qr_phone.png")
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        fmt.DisposeFormats()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("phone: version ", jsonOut.IntOf("symbols[0].selectedEncoding.version"), ", ", *jsonOut.StringOf("outputs[0].path"))

    //  

    //  A text message: the number, then the message.
    json.UpdateString("payload.text","SMSTO:+15555550100:Please call me back")
    json.UpdateString("output.path","qa_output/qr_sms.png")
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        fmt.DisposeFormats()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("sms: version ", jsonOut.IntOf("symbols[0].selectedEncoding.version"), ", ", *jsonOut.StringOf("outputs[0].path"))

    //  

    //  A location: latitude, then longitude, in degrees.
    json.UpdateString("payload.text","geo:41.8781,-87.6298")
    json.UpdateString("output.path","qa_output/qr_location.png")
    success = fmt.QrCode("generate",json,jsonOut)
    if success == false {
        fmt.Println(fmt.LastErrorText())
        fmt.DisposeFormats()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    fmt.Println("location: version ", jsonOut.IntOf("symbols[0].selectedEncoding.version"), ", ", *jsonOut.StringOf("outputs[0].path"))

    //  

    //  Sample output:

    //  email: version 4, qa_output/qr_email.png
    //  phone: version 2, qa_output/qr_phone.png
    //  sms: version 3, qa_output/qr_sms.png
    //  location: version 2, qa_output/qr_location.png

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