如果Outlook已打开，则只能通过Outlook发送电子邮件

我想使用Outlook中的发送电子邮件，如此处所述。 只要我已经打开Outlook，它就可以正常工作。 因此，例如，如果Outlook被最小化并且我执行我的代码，那么我可以发送电子邮件就好了。 但如果Outlook关闭，那么我得到一个例外：

{System.Runtime.InteropServices.COMException (0x80004004): Operation aborted (Exception from HRESULT: 0x80004004 (E_ABORT)) at Microsoft.Office.Interop.Outlook._MailItem.get_Recipients() at OutlookExample.Form1.btnSendEmail_Click(Object sender, EventArgs e) in C:\Users\abc\Documents\Visual Studio 2008\Projects\OutlookExample\OutlookExample\Form1.cs:line 28} 

这是代码：

 using Outlook = Microsoft.Office.Interop.Outlook; ... private void btnSendEmail_Click(object sender, EventArgs e) { try { Outlook.Application oApp = new Outlook.Application(); Outlook.MailItem oMsg = Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem); oMsg.HTMLBody = "Hello, here is your message!"; oMsg.Subject = "This is a test message"; Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients; Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add("[e-mail]"); oRecip.Resolve(); oMsg.Send(); oRecip = null; oRecips = null; oMsg = null; oApp = null; } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } 

为什么这不起作用？

编辑：这是解决方案

 using Outlook = Microsoft.Office.Interop.Outlook; ... private void btnSendEmail_Click(object sender, EventArgs e) { try { Outlook.Application oApp = new Outlook.Application(); // These 3 lines solved the problem Outlook.NameSpace ns = oApp.GetNamespace("MAPI"); Outlook.MAPIFolder f = ns.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox); System.Threading.Thread.Sleep(5000); // test Outlook.MailItem oMsg = Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem); oMsg.HTMLBody = "Hello, here is your message!"; oMsg.Subject = "This is a test message"; Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients; Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add("[e-mail]"); oRecip.Resolve(); oMsg.Send(); oRecip = null; oRecips = null; oMsg = null; oApp = null; } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } 

Answer 1

以下代码可靠地为我工作了几个月：

  app = new Microsoft.Office.Interop.Outlook.Application(); Microsoft.Office.Interop.Outlook.NameSpace ns = app.GetNamespace("MAPI"); f = ns.GetDefaultFolder(OlDefaultFolders.olFolderInbox); Thread.Sleep(5000); // a bit of startup grace time. 

如果outlook是开放的，它会使用它，如果不是它打开它。 当然，如果你的前景要求你登录，你的代码就不会允许。 某些系统使您难以自动登录。

Answer 2

我不喜欢使用Thread.Sleep 5秒的想法，所以我找到了另一个解决方案，对我有用：

您只需获取新创建的Inspector对象即可

 Outlook.Application oApp = new Outlook.Application(); Outlook.MailItem oMsg = (Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem); Outlook.Inspector oInspector = oMsg.GetInspector; 

答案最初发布在最初用于Outlook 2007的Google群组中 （但它适用于Outlook 2010）