Question

我在测试Delphi 2006 BDS应用程序中有以下代码：

procedure TForm1.Button1Click(Sender: TObject);
const
  olMailItem = 0;
var
  Outlook: OleVariant;
  vMailItem: variant;
begin
  Outlook := CreateOleObject('Outlook.Application');
  vMailItem := Outlook.CreateItem(olMailItem);

  try
    vMailItem.Recipients.add('anemailaddress@gmail.com');
    vMailItem.Display(True); -- outlook mail message is displayed modally
  except
  end;

  VarClear(Outlook);
end;

我需要能够检测用户是否在Outlook屏幕中发送了电子邮件。我尝试了以下代码：

if vMailItem.Sent then
 ...

但收到错误消息'项目已被移动或删除'。我认为这是因为邮件项已移至已发送邮件文件夹。检测用户是否发送电子邮件的最佳方法是什么？此外，如果用户确实发送了电子邮件，那么我还需要能够查看电子邮件正文。

提前致谢。

Answer 1

看起来你必须使用邮件项目的Send Event。如果你使用早期绑定，将'outlook [*]。pas'文件中的一个放在'uses'子句中RAD Studio的'.. \ OCX \ Servers'文件夹中，那么这将更加容易，然后：< / p>

uses
  ..., outlook2000;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    OutlookApplication: TOutlookApplication;
    procedure OnMailSend(Sender: TObject; var Cancel: WordBool);
  public
  end;

[...]

procedure TForm1.FormCreate(Sender: TObject);
begin
  OutlookApplication := TOutlookApplication.Create(Self);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  MailItem: _MailItem;
  Mail: TMailItem;
begin
  MailItem := OutlookApplication.CreateItem(olMailItem) as _MailItem;

  Mail := TMailItem.Create(nil);
  try
    Mail.ConnectTo(MailItem);
    Mail.OnSend := OnMailSend;

    MailItem.Recipients.Add('username@example.com');
    MailItem.Display(True);
  finally
    Mail.Free;
  end;
end;

procedure TForm1.OnMailSend(Sender: TObject; var Cancel: WordBool);
begin
  ShowMessage((Sender as TMailItem).Body);
end;

使用后期绑定，您必须完成导入包装器所做的一些工作。最简单的例子可能是这样的：

 
type
  TForm1 = class(TForm, IDispatch)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    FCookie: Integer;
    FMailItem: OleVariant;
    procedure MailSent;
  protected
    function QueryInterface(const IID: TGUID; out Obj): HResult; override;
    function Invoke(DispID: Integer; const IID: TGUID; LocaleID: Integer;
      Flags: Word; var Params; VarResult, ExcepInfo, ArgErr: Pointer): HResult;
      stdcall;
  public
  end;

[...]

uses
  comobj;

const
  DIID_ItemEvents: TGUID = '{0006303A-0000-0000-C000-000000000046}';
  SendItemDispID = 61445;

function TForm1.QueryInterface(const IID: TGUID; out Obj): HResult;
begin
  if IsEqualIID(IID, DIID_ItemEvents) and GetInterface(IDispatch, Obj) then
    Result := S_OK
  else
    Result := inherited QueryInterface(IID, Obj);
end;

function TForm1.Invoke(DispID: Integer; const IID: TGUID; LocaleID: Integer;
  Flags: Word; var Params; VarResult, ExcepInfo, ArgErr: Pointer): HResult;
begin
  Result := S_OK;
  if DispID = SendItemDispID then
    MailSent;
end;


procedure TForm1.Button1Click(Sender: TObject);
const
  olMailItem = 0;
var
  Outlook: OleVariant;
  CPContainer: IConnectionPointContainer;
  ConnectionPoint: IConnectionPoint;
begin
  Outlook := CreateOleObject('Outlook.Application');
  FMailItem := Outlook.CreateItem(olMailItem);
  FMailItem.Recipients.add('username@example.com');

  if Supports(FMailItem, IConnectionPointContainer, CPContainer) then begin
    CPContainer.FindConnectionPoint(DIID_ItemEvents, ConnectionPoint);
    if Assigned(ConnectionPoint) then
      ConnectionPoint.Advise(Self, FCookie);
    CPContainer := nil;
  end;

  FMailItem.Display(True);

  if Assigned(ConnectionPoint) then begin
    ConnectionPoint.Unadvise(FCookie);
    ConnectionPoint := nil;
  end;

  VarClear(FMailItem);
  VarClear(Outlook);
end;

procedure TForm1.MailSent;
begin
  ShowMessage(FMailItem.Body);
end;

Answer 2

我使用VBA提出了解决问题第一部分的解决方案。它基本上依赖于错误处理来确定是否发送了电子邮件。

Public Sub SendEmail()
    On Error GoTo ErrorHandler

    Dim objOutlook As Outlook.Application
    Dim objMailItem As Outlook.MailItem

    Do
        Set objOutlook = New Outlook.Application
        Set objMailItem = objOutlook.CreateItem(olMailItem)

        With objMailItem
            .BodyFormat = olFormatHTML

            .To = "test@email.com"
            .Subject = "Test"
            .HTMLBody = "<html><body>Test</body></html>"

            .Display True

            If .Saved Then
                MsgBox "Your email was saved, but not sent. Please click OK and then click the Send " & _
                    "button once the email is displayed. You can delete the saved email from your " & _
                    "Drafts folder at a later time.", vbOKOnly, "Error"
            Else
                MsgBox "Your email was not sent. Please click OK and then click the Send " & _
                    "button once the email is displayed.", vbOKOnly, "Error"
            End If
        End With
    Loop While Not objMailItem.Sent

    Set objMailItem = Nothing
    Set objOutlook = Nothing

    Exit Sub

ErrorHandler:
    Select Case Err.DESCRIPTION
        Case "The item has been moved or deleted.":
            ' The email was sent, so it's no longer available, just clean up and exit.
            Set objMailItem = Nothing
            Set objOutlook = Nothing

        Case Else
            With Err
                .Raise .Number, .Source, .DESCRIPTION, .HelpFile, .HelpContext
            End With

    End Select
End Sub

Outlook对象模型 - 检测是否已发送电子邮件

2 个答案: