Sample code for 30+ languages & platforms
C#

Outlook -- Create Reply Email, Update, and Send

See more Outlook Examples

Creates a reply email in the Drafts folder, updates the reply with information, and then sends the reply.

Chilkat C# Downloads

C#
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:
http.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN";

//  This example will search /Inbox for a message that will be replied to.
//  First we need to get the folder ID for /Inbox.
//  Then we'll search for messages based on some criteria, and reply to the 1st matching message.
//  To reply, we'll create the reply message in the Drafts folder, update it with content, and the send.

//  Get the folder ID for /Inbox from the folder map created by this example 
Chilkat.Hashtable htFolderMap = new Chilkat.Hashtable();
Chilkat.StringBuilder sbMap = new Chilkat.StringBuilder();
sbMap.LoadFile("qa_data/outlook/folderMap.xml","utf-8");
htFolderMap.AddFromXmlSb(sbMap);

//  Get the ID for the "/Inbox" folder:
string folderId = htFolderMap.LookupStr("/Inbox");
if (htFolderMap.LastMethodSuccess != true) {
    Debug.WriteLine("Folder ID not found");
    return;
}

success = true;
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;

//  Search for unread emails in this folder from support@chilkatsoft.com 
http.SetUrlVar("folder_id",folderId);
http.SetUrlVar("select","id,subject");
http.SetUrlVar("filter","(isRead eq false) and (from/emailAddress/address eq 'support@chilkatsoft.com')");

Chilkat.StringBuilder sbResponse = new Chilkat.StringBuilder();
success = http.QuickGetSb("https://graph.microsoft.com/v1.0/me/mailFolders/{$folder_id}/messages?$filter={$filter}&$select={$select}",sbResponse);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

json.LoadSb(sbResponse);
//  Show the results..
Debug.WriteLine(json.Emit());

if (json.SizeOfArray("value") == 0) {
    Debug.WriteLine("Empty result set.");
    return;
}

//  Sample results:

//  {
//    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('me')/mailFolders('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA')/messages(id,subject)",
//    "value": [
//      {
//        "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADOpwfq\"",
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj1wAAAA=",
//        "subject": "This email contains a PDF attachment"
//      },
//      {
//        "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADOpwfs\"",
//        "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj14AAAA=",
//        "subject": "This email has the word Amazon in the subject.."
//      }
//    ]
//  }

//  We'll create a reply for the 1st message in the result set.
//  We'll need the message existing id.

string existingMsgId = json.StringOf("value[0].id");

//  To create a reply, send a request such as the following:

//  	POST https://graph.microsoft.com/v1.0/me/messages/{id}/createReply
//  	Content-type: application/json
//  	Content-length: 248
//  
//  	{
//  	  "comment": "comment-value"
//  	}

Chilkat.JsonObject jsonRequestBody = new Chilkat.JsonObject();
jsonRequestBody.UpdateString("comment","This is a comment");

http.SetUrlVar("message_id",existingMsgId);

//  Create the reply in the Drafts folder:
Chilkat.HttpResponse resp = new Chilkat.HttpResponse();
success = http.HttpJson("POST","https://graph.microsoft.com/v1.0/me/messages/{$message_id}/createReply",jsonRequestBody,"application/json",resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

//  A 201 response indicates success.
if (resp.StatusCode == 201) {
    Debug.WriteLine("Created reply draft.");
    success = true;
}
else {
    Debug.WriteLine("Response status code = " + Convert.ToString(resp.StatusCode));
    Debug.WriteLine("Failed to create reply draft.");
    success = false;
}

//  Show the response in both cases..
Chilkat.JsonObject jsonResponse = new Chilkat.JsonObject();
jsonResponse.EmitCompact = false;
jsonResponse.Load(resp.BodyStr);
Debug.WriteLine(jsonResponse.Emit());
if (success == false) {
    return;
}

//  ----------------------------------------------
//  Get the message id of the newly created reply.
string replyMsgId = jsonResponse.StringOf("id");

//  Update the message with new text in the body..
//  Send an HTTP PATCH request that looks something like this:
//  Only send the message parts that are changing.

//  	PATCH https://graph.microsoft.com/v1.0/me/messages/{reply_message_id}
//  	Content-type: application/json
//  	Content-length: 248
//  
//  	{
//  	  "subject": "subject-value",
//  	  "body": {
//  	    "contentType": "html",
//  	    "content": "updated HTML goes here"
//  	  },
//  	  "inferenceClassification": "other"
//  	}

Chilkat.JsonObject jsonPatch = new Chilkat.JsonObject();
jsonPatch.UpdateString("body.contentType","html");

//  The reply email that Outlook created will contain the original message under a horizontal rule.
//  The body.content should contain this substring:  "<body bgcolor=\"#FFFFFF\">\r\n<hr "
//  We're going to insert our reply after the body tag, and before the hr tag.
Chilkat.StringBuilder sbHtml = new Chilkat.StringBuilder();
jsonResponse.StringOfSb("body.content",sbHtml);
//  Insert the response HTML in the reply HTML body.
int numReplaced = sbHtml.ReplaceBetween("<body bgcolor=\"#FFFFFF\">","<hr ","\r\n","<p>This is my response.</p>");
if (numReplaced != 1) {
    Debug.WriteLine("Something is amiss!");
    return;
}

jsonPatch.UpdateString("body.content",sbHtml.GetAsString());

//  Add additional CC, BCC, or TO recipients like this:
int numToRecipients = jsonResponse.SizeOfArray("toRecipients");
int i = 0;
//  Copy existing TO recipients.
while (i < numToRecipients) {
    jsonPatch.I = i;
    jsonResponse.I = i;
    jsonPatch.UpdateString("toRecipients[i].emailAddress.name",jsonResponse.StringOf("toRecipients[i].emailAddress.name"));
    jsonPatch.UpdateString("toRecipients[i].emailAddress.address",jsonResponse.StringOf("toRecipients[i].emailAddress.address"));
    i = i + 1;
}

//  Add an additional TO recipient.
jsonPatch.I = numToRecipients;
jsonPatch.UpdateString("toRecipients[i].emailAddress.name","Chilkat");
jsonPatch.UpdateString("toRecipients[i].emailAddress.address","admin@chilkat.io");

int numCcRecipients = jsonResponse.SizeOfArray("ccRecipients");
i = 0;
//  Copy existing CC recipients.
while (i < numCcRecipients) {
    jsonPatch.I = i;
    jsonResponse.I = i;
    jsonPatch.UpdateString("ccRecipients[i].emailAddress.name",jsonResponse.StringOf("ccRecipients[i].emailAddress.name"));
    jsonPatch.UpdateString("ccRecipients[i].emailAddress.address",jsonResponse.StringOf("ccRecipients[i].emailAddress.address"));
    i = i + 1;
}

//  Add an additional CC recipient.
jsonPatch.I = numCcRecipients;
jsonPatch.UpdateString("ccRecipients[i].emailAddress.name","Chilkat GMail");
jsonPatch.UpdateString("ccRecipients[i].emailAddress.address","chilkat.support@gmail.com");

jsonPatch.EmitCompact = false;
Debug.WriteLine(jsonPatch.Emit());

http.SetUrlVar("message_id",replyMsgId);
success = http.HttpJson("PATCH","https://graph.microsoft.com/v1.0/me/messages/{$message_id}",jsonPatch,"application/json",resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

//  A 200 response indicates success.
if (resp.StatusCode == 200) {
    Debug.WriteLine("Patched the reply draft.");
    success = true;
}
else {
    Debug.WriteLine("Response status code = " + Convert.ToString(resp.StatusCode));
    Debug.WriteLine("Failed to patch the reply draft.");
    success = false;
}

//  Show the response in both cases..
jsonResponse.Load(resp.BodyStr);
Debug.WriteLine(jsonResponse.Emit());
if (success == false) {
    return;
}

//  ---------------------------------------------------------------------
//  OK, let's send the reply email...
//  To send, POST with an empty request body:
//  POST https://graph.microsoft.com/v1.0/me/messages/{id}/send
success = http.HttpStr("POST","https://graph.microsoft.com/v1.0/me/messages/{$message_id}/send","","","",resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

//  A 202 response indicates success.
if (resp.StatusCode == 202) {
    Debug.WriteLine("Sent the email reply.");
    //  If the status code was 202, there is no response body.
}
else {
    Debug.WriteLine("Response status code = " + Convert.ToString(resp.StatusCode));
    Debug.WriteLine("Failed to send the email reply.");
    jsonResponse.Load(resp.BodyStr);
    Debug.WriteLine(jsonResponse.Emit());
}

Debug.WriteLine("Finished.");

//  -----------------------------------------------------------------------
//  A sample successful JSON response for the createReply looks like this:

//  	{
//  	  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#message",
//  	  "@odata.type": "#microsoft.graph.message",
//  	  "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADQAwR4\"",
//  	  "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM-lQbAAAAA=",
//  	  "createdDateTime": "2017-06-01T14:31:56Z",
//  	  "lastModifiedDateTime": "2017-06-01T14:31:56Z",
//  	  "changeKey": "CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADQAwR4",
//  	  "categories": [
//  	  ],
//  	  "receivedDateTime": "2017-06-01T14:31:56Z",
//  	  "sentDateTime": "2017-06-01T14:31:56Z",
//  	  "hasAttachments": false,
//  	  "internetMessageId": "<SN1PR20MB0461AF40FC899A8462536F04E6F60@SN1PR20MB0461.namprd20.prod.outlook.com>",
//  	  "subject": "RE: This email contains a PDF attachment",
//  	  "bodyPreview": "________________________________\r\nFrom: Chilkat Software <support@chilkatsoft.com>\r\nSent: Tuesday, May 30, 2017 10:58:56 PM\r\nTo: chilkatsoft@outlook.com\r\nSubject: This email contains a PDF attachment\r\n\r\nThis email contains a PDF attachment\r\n--\r\nBest Regar",
//  	  "importance": "normal",
//  	  "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA",
//  	  "conversationId": "AQQkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAQAMMaWY-CWmVOqNKt-NiVhkU=",
//  	  "isDeliveryReceiptRequested": false,
//  	  "isReadReceiptRequested": false,
//  	  "isRead": true,
//  	  "isDraft": true,
//  	  "webLink": "https://outlook.live.com/owa/?ItemID=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAgEPAAAA5%2BvF7TKKdE6bGCRqXyl2PQAAAM%2FlQbAAAAA%3D&exvsurl=1&viewmodel=ReadMessageItem",
//  	  "inferenceClassification": "focused",
//  	  "body": {
//  	    "contentType": "html",
//  	    "content": "<html>\r\n<head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n<meta content=\"text/html; charset=us-ascii\">\r\n<meta content=\"text/html; charset=utf-8\">\r\n</head>\r\n<body bgcolor=\"#FFFFFF\">\r\n<hr tabindex=\"-1\" style=\"display:inline-block; width:98%\"> ... </html>\r\n"
//  	  },
//  	  "sender": {
//  	    "emailAddress": {
//  	      "name": "Matt Smith",
//  	      "address": "chilkatsoft@outlook.com"
//  	    }
//  	  },
//  	  "from": {
//  	    "emailAddress": {
//  	      "name": "Matt Smith",
//  	      "address": "chilkatsoft@outlook.com"
//  	    }
//  	  },
//  	  "toRecipients": [
//  	    {
//  	      "emailAddress": {
//  	        "name": "Chilkat Software",
//  	        "address": "support@chilkatsoft.com"
//  	      }
//  	    }
//  	  ],
//  	  "ccRecipients": [
//  	  ],
//  	  "bccRecipients": [
//  	  ],
//  	  "replyTo": [
//  	  ]
//  	}
//  

//  -----------------------------------------------------------------------
//  A sample successful PATCH JSON response looks like this:

//  	{
//  	  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('admin%40chilkat.io')/messages/$entity",
//  	  "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADQAwSA\"",
//  	  "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM-lQbMAAAA=",
//  	  "createdDateTime": "2017-06-01T15:18:14Z",
//  	  "lastModifiedDateTime": "2017-06-01T15:18:17Z",
//  	  "changeKey": "CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADQAwSA",
//  	  "categories": [
//  	  ],
//  	  "receivedDateTime": "2017-06-01T15:18:15Z",
//  	  "sentDateTime": "2017-06-01T15:18:15Z",
//  	  "hasAttachments": false,
//  	  "internetMessageId": "<SN1PR20MB046138C4A26051200764FE38E6F60@SN1PR20MB0461.namprd20.prod.outlook.com>",
//  	  "subject": "RE: This email has the word Amazon in the subject..",
//  	  "bodyPreview": "This is my response.\r\n\r\n________________________________\r\nFrom: Chilkat Software <support@chilkatsoft.com>\r\nSent: Tuesday, May 30, 2017 11:40:01 PM\r\nTo: Chilkat Software\r\nSubject: This email has the word Amazon in the subject..\r\n\r\nThis email has the word ",
//  	  "importance": "normal",
//  	  "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA",
//  	  "conversationId": "AQQkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAQAE64PfPP1n1IhU4YasnNN0Q=",
//  	  "isDeliveryReceiptRequested": false,
//  	  "isReadReceiptRequested": false,
//  	  "isRead": true,
//  	  "isDraft": true,
//  	  "webLink": "https://outlook.live.com/owa/?ItemID=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAgEPAAAA5%2BvF7TKKdE6bGCRqXyl2PQAAAM%2FlQbMAAAA%3D&exvsurl=1&viewmodel=ReadMessageItem",
//  	  "inferenceClassification": "focused",
//  	  "body": {
//  	    "contentType": "html",
//  	    "content": "<html>\r\n<head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n<meta content=\"text/html; charset=us-ascii\">\r\n<meta content=\"text/html; charset=us-ascii\">\r\n<meta content=\"text/html; charset=utf-8\">\r\n</head>\r\n<body bgcolor=\"#FFFFFF\">\r\n<p>This is my response.</p>\r\n<hr tabindex=\"-1\" style=\"display:inline-block; width:98%\">\r\n<div id=\"divRplyFwdMsg\" dir=\"ltr\"><font face=\"Calibri, sans-serif\" color=\"#000000\" style=\"font-size:11pt\"><b>From:</b> Chilkat Software &lt;support@chilkatsoft.com&gt;<br>\r\n<b>Sent:</b> Tuesday, May 30, 2017 11:40:01 PM<br>\r\n<b>To:</b> Chilkat Software<br>\r\n<b>Subject:</b> This email has the word Amazon in the subject..</font>\r\n<div>&nbsp;</div>\r\n</div>\r\n<div><font face=\"Calibri\">This email has the word Amazon in the subject..</font><br>\r\n<div class=\"moz-signature\">-- <br>\r\nBest Regards,<br>\r\nMatt Smith<br>\r\nChilkat Software, Inc.<br>\r\n<p><a href=\"https://twitter.com/chilkatsoft\">Follow Chilkat on Twitter</a> </p>\r\n</div>\r\n</div>\r\n</body>\r\n</html>\r\n"
//  	  },
//  	  "sender": {
//  	    "emailAddress": {
//  	      "name": "Matt Smith",
//  	      "address": "chilkatsoft@outlook.com"
//  	    }
//  	  },
//  	  "from": {
//  	    "emailAddress": {
//  	      "name": "Matt Smith",
//  	      "address": "chilkatsoft@outlook.com"
//  	    }
//  	  },
//  	  "toRecipients": [
//  	    {
//  	      "emailAddress": {
//  	        "name": "Chilkat Software",
//  	        "address": "support@chilkatsoft.com"
//  	      }
//  	    }
//  	  ],
//  	  "ccRecipients": [
//  	  ],
//  	  "bccRecipients": [
//  	  ],
//  	  "replyTo": [
//  	  ]
//  	}