.NET Core 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. .NET Core C#

bool 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.
Chilkat.StringBuilder sbCard = new Chilkat.StringBuilder();
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);

Chilkat.JsonObject json = new Chilkat.JsonObject();
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");

Chilkat.Formats fmt = new Chilkat.Formats();
Chilkat.JsonObject jsonOut = new Chilkat.JsonObject();
success = fmt.QrCode("generate",json,jsonOut);
if (success == false) {
    Debug.WriteLine(fmt.LastErrorText);
    return;
}

Debug.WriteLine("vCard length: " + Convert.ToString(sbCard.Length));
Debug.WriteLine("QR version: " + Convert.ToString(jsonOut.IntOf("symbols[0].selectedEncoding.version")));
Debug.WriteLine("modules: " + Convert.ToString(jsonOut.IntOf("symbols[0].dimensions.modulesWide")) + " x " + Convert.ToString(jsonOut.IntOf("symbols[0].dimensions.modulesHigh")));
Debug.WriteLine("image: " + Convert.ToString(jsonOut.IntOf("outputs[0].width")) + " x " + Convert.ToString(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