(C#) WhatsApp Cloud API Send Message

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Demonstrates how to send a message using the WhatsApp Cloud API (Business App)

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Chilkat.Http http = new Chilkat.Http();
bool success;

// The following JSON is sent in the request body.

// {
//   "messaging_product": "whatsapp",
//   "to": "16302581871",
//   "type": "template",
//   "template": {
//     "name": "hello_world",
//     "language": {
//       "code": "en_US"
//     }
//   }
// }

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("messaging_product","whatsapp");
json.UpdateString("to","15555555555");
json.UpdateString("type","template");
json.UpdateString("template.name","hello_world");
json.UpdateString("template.language.code","en_US");

http.AuthToken = "EAANrS5....yFB9Ma";
http.SetRequestHeader("Content-Type","application/json");

Chilkat.HttpResponse resp = http.PostJson3("https://graph.facebook.com/v18.0/111111111111111/messages","application/json",json);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine(Convert.ToString(resp.StatusCode));
Debug.WriteLine(resp.BodyStr);

// Here's a screenshot of our WhatsApp test app.

//