使用 C# 进行 Outlook 2003 编程的简介 7

 public class Connect : Object, Extensibility.IDTExtensibility2
{
...
  // Our UI will consist of a single CommandBarButton
  private CommandBarButton btnGetEMailStats;
}

 public void OnStartupComplete(ref System.Array custom)
{
  // First, get access to the CommandBars on
  // the active explorer.
  CommandBars commandBars =
    applicationObject.ActiveExplorer().CommandBars;
  try
  {
    // If our button is already
    // on the Standard CommandBar, use it.
    btnGetEMailStats = (CommandBarButton)
      commandBars["Standard"].Controls["Statistics"];
  }
  catch
  {
    // OOPS!  Our button is not there, so
    // we need to make a new instance.
    // Note that the Add() method was
    // defined to take optional parameters,
    // which are not supported in C#.
    // Thus we must specify Missing.Value.
    btnGetEMailStats = (CommandBarButton)
      commandBars["Standard"].Controls.Add(1,
      System.Reflection.Missing.Value,
      System.Reflection.Missing.Value,
      System.Reflection.Missing.Value,
      System.Reflection.Missing.Value);
    btnGetEMailStats.Caption = "Statistics";
    btnGetEMailStats.Style = MsoButtonStyle.msoButtonCaption;
  }
  // Setting the Tag property is not required, but can be used
  // to quickly reterive your button.
  btnGetEMailStats.Tag = "Statistics";
  // Setting OnAction is also optional, however if you specify
  // the ProgID of the Add-in, the host will automatically
  // load the Add-in if the user clicks on the CommandBarButton when
  // the Add-in is not loaded. After this point, the Click
  // event handler is called.
  btnGetEMailStats.OnAction = "!";
  btnGetEMailStats.Visible = true;
  // Rig-up the Click event for the new CommandBarButton type.
  btnGetEMailStats.Click += new
    _CommandBarButtonEvents_ClickEventHandler(
    btnGetEMailStats_Click);
}

 private void btnGetEMailStats_Click(CommandBarButton Ctrl,
  ref bool CancelDefault)
{
  // ToDo: Implement custom logic.
}

 public void OnBeginShutdown(ref System.Array custom)
{
  // Get set of command bars on active explorer.
  CommandBars commandBars =
    applicationObject.ActiveExplorer().CommandBars;
  try
  {
    // Find our button and kill it.
    commandBars["Standard"].Controls["GetEMailStats"].Delete(
      System.Reflection.Missing.Value);
  }
  catch(System.Exception ex)
  {MessageBox.Show(ex.Message);}
}

 private void btnGetEMailStats_Click(CommandBarButton Ctrl,
  ref bool CancelDefault)
{
  string statInfo;
  DateTime today = DateTime.Today;
  // The stats we are tracing.
  int eMailsToday = 0;
  int eMailsThisMonth = 0;
  int eMailSentToday = 0;
  int eMailSentThisMonth = 0;
  // Get items in user's inbox.
  NameSpace outlookNS = applicationObject.GetNamespace("MAPI");
  MAPIFolder inboxFolder
    = outlookNS.GetDefaultFolder(OlDefaultFolders.olFolderInbox);
  // Compare time received to current day / month
  // and update our counters.
  foreach(object item in inboxFolder.Items)
  {
    MailItem mi = item as MailItem;
    if(mi != null)
    {
      if(mi.ReceivedTime.Day == today.Day)
        eMailsToday++;
      if(mi.ReceivedTime.Month == today.Month)
        eMailsThisMonth++;
    }
  }
  // Build first part of statInfo string.
  statInfo = string.Format("E-mails received today: {0}\n",
    eMailsToday);
  statInfo += string.Format("E-mails received this Month: {0}\n",
    eMailsThisMonth);
  statInfo += "--------------------------------------\n";
  // Get items in user's sent item folder and
  // test again.
  MAPIFolder SentFolder =
    outlookNS.GetDefaultFolder(OlDefaultFolders.olFolderSentMail);
  foreach(object item in SentFolder.Items)
  {
    // See if current item is a MailItem
    MailItem mi = item as MailItem;
    if(mi != null)
    {
      // It is, so get day/month stats.
      if(mi.SentOn.Day == today.Day)
        eMailSentToday++;
      if(mi.SentOn.Month == today.Month)
        eMailSentThisMonth++;
    }
  }
  // Build last part of statInfo string.
  statInfo += string.Format("E-mails sent today: {0}\n",
    eMailSentToday);
  statInfo += string.Format("E-mails sent this Month: {0}\n",
    eMailSentThisMonth);
  // Show results.
  MessageBox.Show(statInfo, "Current E-mail stats");
}