检索公共Outlook日历约会？

Question

我想从任何给定用户的名字检索当天的约会。 到目前为止，我可以通过下面的代码检索我自己的约会。

else if (UserSelection == "2") 
      { 
       //Create the Outlook application 
       Outlook.Application oApplication = new Outlook.Application(); 

       // Get the NameSpace and Logon information. 
       Outlook.NameSpace oNameSpace = oApplication.GetNamespace("mapi"); 

       //Log on by using a dialog box to choose the profile. 
       oNameSpace.Logon(Missing.Value, Missing.Value, true, true); 

       // Get the Calendar folder. 
       Outlook.MAPIFolder oCalendar = oNameSpace.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderCalendar); 

       // Get the appointments (items) collection from the Calendar folder. 
       Outlook.Items oItems = oCalendar.Items; 
       oItems.IncludeRecurrences = true; 


       List<Outlook.AppointmentItem> lst = new List<Outlook.AppointmentItem>(); 

       foreach (Outlook.AppointmentItem item in oItems) 
       { 
        if (item.Start.Day == DateTime.Today.Day && item.Start.Month == DateTime.Today.Month && item.Start.Year == DateTime.Today.Year) 
        { 
         Console.WriteLine("Organizer: " + item.Organizer); 
         Console.WriteLine("Start: " + item.Start.ToString()); 
         Console.WriteLine("End: " + item.End.ToString()); 
         Console.WriteLine("Location: " + item.Location); 
         Console.WriteLine("Recurring: " + item.IsRecurring); 
         Console.WriteLine("Subject: " + item.Subject); 
         Console.WriteLine("Attendees: " + item.OptionalAttendees); 
         Console.WriteLine(""); 
        } 
       } 


       //Get the last appointment(item) 
       //Outlook.AppointmentItem oAppt = (Outlook.AppointmentItem)oItems.GetLast(); 

       //Show the appointment(item) in outlook. 
       //oAppt.Display(true); 

       // Done. Log off. 
       oNameSpace.Logoff(); 

       //Clean up. 
       oItems = null; 
       oCalendar = null; 
       oNameSpace = null; 
       oApplication = null; 

       Console.ReadLine(); 

这工作正常。但是，下面的代码不会返回给定的用户“userName”的约会。

if (UserSelection == "1") 
     //try (used for error handling) 
     { 
      string userName = Console.ReadLine(); 


      Outlook.Application oApplication; 
      oApplication = new Outlook.Application(); 
      Outlook.NameSpace oNameSpace = oApplication.GetNamespace("mapi"); 
      oNameSpace.Logon(Missing.Value, Missing.Value, true, true); 

      Outlook.Recipient oRecip = (Outlook.Recipient)oNameSpace.CreateRecipient(userName); 
      Outlook.MAPIFolder oCalendar = (Outlook.MAPIFolder)oNameSpace.GetSharedDefaultFolder(oRecip, Outlook.OlDefaultFolders.olFolderCalendar); 

      // Get the appointments (items) collection from the Calendar folder. 
      Outlook.Items oItems = oCalendar.Items; 
      oItems.IncludeRecurrences = true; 



      List<Outlook.AppointmentItem> lst = new List<Outlook.AppointmentItem>(); 

      foreach (Outlook.AppointmentItem item in oItems) 
      { 
       if (item.Start.Day == DateTime.Today.Day && item.Start.Month == DateTime.Today.Month && item.Start.Year == DateTime.Today.Year) 
       { 
        Console.WriteLine("Organizer: " + item.Organizer); 
        Console.WriteLine("Start: " + item.Start.ToString()); 
        Console.WriteLine("End: " + item.End.ToString()); 
        Console.WriteLine("Location: " + item.Location); 
        Console.WriteLine("Recurring: " + item.IsRecurring); 
        Console.WriteLine("Subject: " + item.Subject); 
        Console.WriteLine("Attendees: " + item.OptionalAttendees); 
        Console.WriteLine(""); 
       } 
      } 



       //Show the appointment(item) in outlook. 
       //oAppt.Display(true); 

       // Done. Log off. 
       oNameSpace.Logoff(); 

       // Clean up. 

       oItems = null; 
       oCalendar = null; 
       oNameSpace = null; 
       oApplication = null; 

       Console.ReadLine(); 

产生错误的代码行是foreach (Outlook.AppointmentItem item in oItems) 返回的错误是“‘System.Runtime.InteropServices.COMException’类型的未处理的异常出现在mscorlib.dll

其他信息：从HRESULT异常：0x8834010F“

任何帮助，使这项工作将不胜感激，谢谢。

Answer 1

我建议从立即发布底层COM对象开始。完成使用后，请使用System.Runtime.InteropServices.Marshal.ReleaseComObject释放Outlook对象。如果您的加载项尝试枚举存储在Microsoft Exchange Server上的集合中的超过256个Outlook项目，这一点尤其重要。如果您没有及时释放这些物品，您可以达到Exchange对任何时候打开的物品的最大数量施加的限制。然后在Visual Basic中将变量设置为Nothing（C＃中的空值）以释放对该对象的引用。有关更多信息，请参阅Systematically Releasing Objects。

而且我建议使用查找/FindNext中或限制类项目的方法。您可以在以下文章了解更多关于他们：

• How To: Retrieve Outlook calendar items using Find and FindNext methods
• How To: Use Restrict method in Outlook to get calendar items