Outlook Send HTML Email

This example sends an HTML email. Other examples exist for:
Sending plain-text email.
Sending HTML email with embedded images.
Sending email with attachments.
Sending HTML email with embedded images and attachments.
Chilkat C# Downloads

bool success = false;

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

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

//  Use your previously obtained access token here:
//  See the following examples for getting an access token:
//     Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//     Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//     Refresh Access Token (Azure AD v2.0 Endpoint).
//     Refresh Access Token (Azure AD Endpoint).

http.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN";

//  To send mail, we'll POST to the following endpoint:
//  
//  POST /users/{id | userPrincipalName}/sendMail
//  
//  (The special keyword "me" may be used in place of a principal name.)
//  

//  This example will send HTML email containing the following HTML body:

//  	<html>
//  	<head>
//  	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
//  	<meta content="text/html; charset=utf-8">
//  	</head>
//  	<body bgcolor="#FFFFFF">
//  	<font face="Calibri">This is a test <b>HTML email</b>.<br>
//  	</font>
//  	</body>
//  	</html>

//  Build the HTML body...
bool bCrlf = true;
Chilkat.StringBuilder sbHtmlBody = new Chilkat.StringBuilder();
sbHtmlBody.AppendLine("<html>",bCrlf);
sbHtmlBody.AppendLine("<head>",bCrlf);
sbHtmlBody.AppendLine("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">",bCrlf);
sbHtmlBody.AppendLine("<meta content=\"text/html; charset=utf-8\">",bCrlf);
sbHtmlBody.AppendLine("</head>",bCrlf);
sbHtmlBody.AppendLine("<body bgcolor=\"#FFFFFF\">",bCrlf);
sbHtmlBody.AppendLine("<font face=\"Calibri\">This is a test <b>HTML email</b>.<br>",bCrlf);
sbHtmlBody.AppendLine("</font>",bCrlf);
sbHtmlBody.AppendLine("</body>",bCrlf);
sbHtmlBody.AppendLine("</html>",bCrlf);

//  The body of the POST request contains JSON that specifies the email subject, body,
//  recipients, etc.  This example will build the following JSON HTML email:
//  

//  	{
//  	  "message": {
//  	    "subject": "Sample HTML Email",
//  	    "body": {
//  	      "contentType": "html",
//  	      "content": "The HTML body goes here..."
//  	    },
//  	    "toRecipients": [
//  	      {
//  	        "emailAddress": {
//  		  "name": "Chilkat Software",
//  	          "address": "admin@chilkat.io"
//  	        }
//  	      },
//  	      {
//  	        "emailAddress": {
//  	          "address": "chilkat.support@gmail.com"
//  	        }
//  	      }
//  	    ],
//  	    "ccRecipients": [
//  	      {
//  	        "emailAddress": {
//  		  "name": "Chilkat Blog",
//  		  "address": "admin@cknotes.com"
//  	        }
//  	      }
//  	    ]
//  	  },
//  	  "saveToSentItems": true
//  	}
//  

//  Build the above JSON.
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("message.subject","Sample HTML email");
json.UpdateString("message.body.contentType","html");
json.UpdateString("message.body.content",sbHtmlBody.GetAsString());
json.UpdateString("message.toRecipients[0].emailAddress.name","Chilkat Software");
json.UpdateString("message.toRecipients[0].emailAddress.address","admin@chilkat.io");
json.UpdateString("message.toRecipients[1].emailAddress.address","chilkat.support@gmail.com");
json.UpdateString("message.ccRecipients[0].emailAddress.name","Chilkat Blog");
json.UpdateString("message.ccRecipients[0].emailAddress.address","admin@cknotes.com");
json.UpdateBool("saveToSentItems",true);

//  Send the HTTP POST (i.e. send the HTML email)
Chilkat.HttpResponse resp = new Chilkat.HttpResponse();
success = http.HttpJson("POST","https://graph.microsoft.com/v1.0/me/sendMail",json,"application/json",resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

//  The send succeeded if the response status code = 202.
//  In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
if (resp.StatusCode != 202) {
    json.Load(resp.BodyStr);
    json.EmitCompact = false;
    Debug.WriteLine(json.Emit());
    Debug.WriteLine("Failed, response status code = " + Convert.ToString(resp.StatusCode));
}
else {
    Debug.WriteLine("Outlook HTML Mail Sent.");
}