C＃异常 - System.InvalidCastException

-1

类似于这个问题的其他问题的解决方案已经尝试过，但没有奏效。C＃异常 - System.InvalidCastException

关于如何修复它的任何想法？

System.InvalidCastException: 'Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Interop.Outlook.MailItem'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00063034-0000-0000-C000-000000000046}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).'

try{ 
     outlookApplication = new Application(); 
     outlookNamespace = outlookApplication.GetNamespace("MAPI"); 
     inboxFolder = outlookNamespace.GetDefaultFolder(OlDefaultFolders.olFolderInbox); 
     mailItems = inboxFolder.Items; 

     foreach (MailItem email in mailItems){ 
      var emailSubj = email.Subject.ToString(); 
      var emailBody = email.Body; 

      if (String.IsNullOrWhiteSpace(email.Subject)){ 
       continue; 
      } 
      else{ 

       if (email.Subject.StartsWith("Email report test")){ 
        Outlook.Folder folder = outlookApplication.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox) as Outlook.Folder; 
        Outlook.Folders folders = folder.Folders; 

        try{ 
         Outlook.Folder newFolder = folders.Add("Email Report test", Type.Missing) as Outlook.Folder; 
         newFolder.Display(); 
        } 
        catch{ 
         Console.WriteLine("Email Report test already exists."); 
        } 
        finally{ 
         Outlook.MAPIFolder destFolder = folder.Folders["Email Report test"]; 

         email.Move(destFolder); 
        } 

        break; 
      } 
      } 
      Marshal.ReleaseComObject(email); 
     }     
     } 
     finally{ 
      ReleaseComObject(mailItems); 
      ReleaseComObject(inboxFolder); 
      ReleaseComObject(outlookNamespace); 
      ReleaseComObject(outlookApplication); 
     } 
    }

提前感谢！

来源

2017-07-07 user7943

点我们错误 –

的foreach（在mailItems的MailItem电子邮件）{7号线 – user7943

也行！我忘了提及哪些事情对于这种情况发生的原因相当重要。如果没有找到具有该特定主题的电子邮件，则会发生异常。 – user7943

使用此：

foreach (MailItem email in mailItems.OfType<MailItem>())

来源

2017-07-07 10:30:21

C＃异常 - System.InvalidCastException

回答

相关问题