(MFC) SendGrid Hello World -- Send Simple Email to Single Recipient

See more SendGrid Examples

Sends an email to a single recipient using SendGrid.

For more information, see https://sendgrid.com/docs/for-developers/sending-email/curl-examples/

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;
    bool success;

    // Implements the following CURL command:

    // curl --request POST \
    //   --url https://api.sendgrid.com/v3/mail/send \
    //   --header 'Authorization: Bearer YOUR_API_KEY' \
    //   --header 'Content-Type: application/json' \
    //   --data '{"personalizations": [{"to": [{"email": "recipient@example.com", "name": "Recipient Name"}]}],"from": {"email": "sendeexampexample@example.com"},"subject": "Hello, World!","content": [{"type": "text/plain", "value": "Heya!"}]}'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

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

    // {
    //   "personalizations": [
    //     {
    //       "to": [
    //         {
    //           "email": "recipient@example.com",
    //           "name": "Recipient Name"
    //         }
    //       ]
    //     }
    //   ],
    //   "from": {
    //     "email": "sendeexampexample@example.com"
    //   },
    //   "subject": "Hello, World!",
    //   "content": [
    //     {
    //       "type": "text/plain",
    //       "value": "Heya!"
    //     }
    //   ]
    // }

    CkJsonObject json;
    json.UpdateString("personalizations[0].to[0].email","recipient@example.com");
    // The "name" is optional.
    json.UpdateString("personalizations[0].to[0].name","Recipient Name");
    json.UpdateString("from.email","sendeexampexample@example.com");
    json.UpdateString("subject","Hello, World!");
    json.UpdateString("content[0].type","text/plain");
    json.UpdateString("content[0].value","Heya!");

    // Adds the "Authorization: Bearer YOUR_API_KEY" header.
    http.put_AuthToken("YOUR_API_KEY");
    http.SetRequestHeader("Content-Type","application/json");

    CkHttpResponse *resp = http.PostJson3("https://api.sendgrid.com/v3/mail/send","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
    }
    else {
        strOut.append("response status code: ");
        strOut.appendInt(resp->get_StatusCode());
        strOut.append("\r\n");
        // Display the response.
        // If successful, the response code is 202 and the response body string is empty.
        // (The response body string may also be empty for error response codes.)
        strOut.append(resp->bodyStr());
        strOut.append("\r\n");
        delete resp;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }