通过Windows服务运行时，操作不可用(来自HRESULT的异常:0x800401E3(MK_E_UNAVAILABLE))? [英] Operation unavailable (Exception from HRESULT: 0x800401E3 (MK_E_UNAVAILABLE)) when running through Windows Service?

问题描述

我试图从Windows Service挂接到Outlook应用程序，但遇到异常操作不可用(HRESULT异常:0x800401E3(MK_E_UNAVAILABLE))是我的代码.

i am try to hook to outlook application from windows Service but getting an exception Operation unavailable (Exception from HRESULT: 0x800401E3 (MK_E_UNAVAILABLE)) here is my code.

   public void ItemSendEvent()
    {
        try
        {
           if (Process.GetProcessesByName(ApplicationConstants.OUTLOOK_PROCESS_NAME).Count() > 0)
                {
                    // If so, use the GetActiveObject method to obtain the process and cast it to an Application object.
                    outlookApplication = Marshal.GetActiveObject(ApplicationConstants.OUTLOOK_APPLICATION_NAME) as Microsoft.Office.Interop.Outlook.Application;
                    Microsoft.Office.Interop.Outlook.NameSpace nameSpace = outlookApplication.GetNamespace(ApplicationConstants.OUTLOOK_NAME_SPACE);
                    nameSpace.Logon("", "", Missing.Value, Missing.Value);
                    nameSpace = null;
                    outlookApplication.ItemSend += outlookApplication_ItemSend;
                }
                log.Info("Outlook Item Send event registered successfully.");
        }
        catch (System.Exception ex)
        {
            log.Error("Exception occurred while registering Outlook Item Send event. " + ex.Message);
        }
    }

但是当我通过Windows窗体应用程序启动它时，它具有相同的代码.我浏览了一些网站，他们说Outlook对象不在ROT表中.解决办法是什么.

but the same code when i launch it through Windows Form Application its working Fine. i gone through some site's and they were saying that outlook object is not in ROT Table. what will be the solution.

推荐答案

Outlook或任何其他Office应用程序都无法在Windows服务中运行，即使您的服务以交互用户身份运行也是如此.仅扩展MAPI(仅C ++或Delphi)或扩展MAPI包装器，如兑换(其 RDO 系列对象.

Outlook, or any other Office app, cannot run in a Windows service even if your service is running as an interactive user. Only Extended MAPI (C++ or Delphi only) or an Extended MAPI wrapper like Redemption (its RDO family objects) can be used in a service.

在您的特定情况下，您似乎正在尝试捕获Application.ItemSend事件.绝对没有理由为此创建Windows服务.创建一个COM加载项-只要Outlook本身在相同安全上下文中的同一进程中运行，它将由Outlook加载并运行.

In you particular case, it looks like you are trying to trap the Application.ItemSend event. There is absolutely no reason to create a Windows service for that. Create a COM addin - it will be loaded by Outlook and run as long as Outlook itself is running in the same process in the same security context.

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