Delphi DLL
Outlook -- Delete Email

Demonstrates how to delete email using the Microsoft Graph API.
Note: This example requires Chilkat v9.5.0.68 or greater.
Chilkat Delphi DLL Downloads

Delphi DLL
uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, Hashtable, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
htFolderMap: HCkHashtable;
sbMap: HCkStringBuilder;
folderId: PWideChar;
json: HCkJsonObject;
sbResponse: HCkStringBuilder;
resp: PWideChar;
messageId: PWideChar;
i: Integer;
numEmails: Integer;

begin
success := False;

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

http := CkHttp_Create();

// Use your previously obtained access token here:
CkHttp_putAuthToken(http,'MICROSOFT_GRAPH_ACCESS_TOKEN');

// This example will search /Inbox for a message we want to delete.
// First we need to get the folder ID for /Inbox.
// Then we'll search for messages based on some criteria, and delete the matching messages.

// Get the folder ID for /Inbox from the folder map created by this example 
htFolderMap := CkHashtable_Create();
sbMap := CkStringBuilder_Create();
CkStringBuilder_LoadFile(sbMap,'qa_data/outlook/folderMap.xml','utf-8');
CkHashtable_AddFromXmlSb(htFolderMap,sbMap);

// Get the ID for the "/Inbox" folder:
folderId := CkHashtable__lookupStr(htFolderMap,'/Inbox');
if (CkHashtable_getLastMethodSuccess(htFolderMap) <> True) then
  begin
    Memo1.Lines.Add('Folder ID not found');
    Exit;
  end;

success := True;
json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);

// Search for emails in this folder with the phrase "Amazon SES" in the subject, and return only the id and subject.
CkHttp_SetUrlVar(http,'folder_id',folderId);
CkHttp_SetUrlVar(http,'select','id,subject');
CkHttp_SetUrlVar(http,'filter','contains(subject,''Amazon SES'')');

sbResponse := CkStringBuilder_Create();
success := CkHttp_QuickGetSb(http,'https://graph.microsoft.com/v1.0/me/mailFolders/{$folder_id}/messages?$filter={$filter}&$select={$select}',sbResponse);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
CkJsonObject_LoadSb(json,sbResponse);
// Show the results..
Memo1.Lines.Add(CkJsonObject__emit(json));

// Sample results:

// 	{
// 	  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('me')/mailFolders('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA')/messages(id,subject)",
// 	  "value": [
// 	    {
// 	      "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAA1jyl6\"",
// 	      "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_AAAAA=",
// 	      "subject": "Amazon SES Address Verification Request in region US West (Oregon)"
// 	    },
// 	    {
// 	      "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAA1jyl7\"",
// 	      "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_EAAAA=",
// 	      "subject": "Amazon SES Address Verification Request in region US West (Oregon)"
// 	    }
// 	  ]
// 	}
// 

// ------------
// Proceed to delete each of the above emails...

i := 0;
numEmails := CkJsonObject_SizeOfArray(json,'value');
while i < numEmails do
  begin
    CkJsonObject_putI(json,i);

    messageId := CkJsonObject__stringOf(json,'value[i].id');
    CkHttp_SetUrlVar(http,'message_id',messageId);
    Memo1.Lines.Add('Deleting ' + messageId);
    resp := CkHttp__quickDeleteStr(http,'https://graph.microsoft.com/v1.0/me/messages/{$message_id}');
    if (CkHttp_getLastMethodSuccess(http) <> True) then
      begin
        Memo1.Lines.Add(CkHttp__lastErrorText(http));
        Exit;
      end;

    // A 204 response indicates success.
    if (CkHttp_getLastStatus(http) = 204) then
      begin
        Memo1.Lines.Add('Message deleted.');
      end
    else
      begin
        Memo1.Lines.Add('Message not deleted.');
        Memo1.Lines.Add(resp);
      end;
    i := i + 1;
  end;

// Sample output:

// Deleting AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_AAAAA=
// Message deleted.
// Deleting AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_EAAAA=
// Message deleted.
// 

CkHttp_Dispose(http);
CkHashtable_Dispose(htFolderMap);
CkStringBuilder_Dispose(sbMap);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbResponse);

end;