C#
C#
Outlook Send HTML Email with Embedded Images
See more Outlook Examples
This example sends an HTML email with embedded images. Other examples exist for:- Sending plain-text email.
- Sending email with attachments.
- Sending HTML email with embedded images and attachments.
This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com
Chilkat C# Downloads
bool success = false;
// Important: This example requires Chilkat v9.5.0.68 or greater.
// 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.
// After the
// <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 with embedded images</b>.<br>
// <br>
// <img alt="" src="cid:starfish"><br>
// <img alt="" src="cid:hedgehogs"><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 with embedded images</b>.<br>",bCrlf);
sbHtmlBody.AppendLine("<br>",bCrlf);
sbHtmlBody.AppendLine("<img alt=\"\" src=\"cid:starfish\"><br>",bCrlf);
sbHtmlBody.AppendLine("<img alt=\"\" src=\"cid:hedgehogs\"><br>",bCrlf);
sbHtmlBody.AppendLine("</font>",bCrlf);
sbHtmlBody.AppendLine("</body>",bCrlf);
sbHtmlBody.AppendLine("</html>",bCrlf);
// Load the image files.
Chilkat.BinData jpgStarfish = new Chilkat.BinData();
jpgStarfish.LoadFile("qa_data/jpg/starfish.jpg");
Chilkat.BinData jpgHedgeHogs = new Chilkat.BinData();
jpgHedgeHogs.LoadFile("qa_data/jpg/hedgehogs.jpg");
// 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 with Embedded Images",
// "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"
// }
// }
// ],
// "attachments": [
// {
// "@odata.type": "#microsoft.graph.fileAttachment",
// "name": "starfish.jpg",
// "contentType": "image/jpeg",
// "size": 6497,
// "isInline": true,
// "contentId": "starfish",
// "contentLocation": null,
// "contentBytes": "base64_data_here"
// },
// {
// "@odata.type": "#microsoft.graph.fileAttachment",
// "name": "hedgehogs.jpg",
// "contentType": "image/jpeg",
// "size": 48845,
// "isInline": true,
// "contentId": "hedgehogs",
// "contentLocation": null,
// "contentBytes": "base64_data_here"
// }
// ]
// },
// "saveToSentItems": true
// }
//
// Build the above JSON.
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("message.subject","Sample HTML Email with Embedded Images");
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.UpdateString("message.attachments[0].\"@odata.type\"","#microsoft.graph.fileAttachment");
json.UpdateString("message.attachments[0].name","starfish.jpg");
json.UpdateString("message.attachments[0].contentType","image/jpeg");
json.UpdateInt("message.attachments[0].size",jpgStarfish.NumBytes);
json.UpdateBool("message.attachments[0].isInline",true);
// This contentId must match the "cid:" in the HTML
json.UpdateString("message.attachments[0].contentId","starfish");
json.UpdateNull("message.attachments[0].contentLocation");
json.UpdateBd("message.attachments[0].contentBytes","base64",jpgStarfish);
json.UpdateString("message.attachments[1].\"@odata.type\"","#microsoft.graph.fileAttachment");
json.UpdateString("message.attachments[1].name","hedgehogs.jpg");
json.UpdateString("message.attachments[1].contentType","image/jpeg");
json.UpdateInt("message.attachments[1].size",jpgHedgeHogs.NumBytes);
json.UpdateBool("message.attachments[1].isInline",true);
// This contentId must match the "cid:" in the HTML
json.UpdateString("message.attachments[1].contentId","hedgehogs");
json.UpdateNull("message.attachments[1].contentLocation");
json.UpdateBd("message.attachments[1].contentBytes","base64",jpgHedgeHogs);
json.UpdateBool("saveToSentItems",true);
// -------------------------------------------------------------
// Important: This example requires Chilkat v9.5.0.68 or greater.
// -------------------------------------------------------------
// 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.");
}