Outlook 2k7 集成（通过 P/Invoke）- 阻止不安全附件

Question

我们目前正在为 C# 软件开发一个插件。该插件提取 PST 文件的内容并将其中的所有项目存储为文本文件（附件除外，附件按其类型存储在与电子邮件相同的文件夹中）。

在我们在 Windows 7 和 Outlook 2K7 上对其进行测试之前，它一直运行没有问题。在装有 Outlook 2000 的计算机上运行相同的先前作业后，我们注意到有超过 12,000 个文件丢失。这些文件原来是附件（主要是 URL）

我们发现问题是 Outlook 2K7 阻止具有特定扩展名的附件。如果您在 Outlook 本身中打开电子邮件，您会在顶部看到一个蓝色条，指出“Outlook 阻止访问以下可能不安全的附件”以及电子邮件中的所有附件。

有没有办法以编程方式获取这些附件，而 Outlook 不会阻止它们？

我们用来保存附件的代码是：

private void saveAttachment(ref object oEmail, StoreInfo currentStoreInfo, string sEmailID, string sExportPath)
{

   int iAttachCount = 0;
   object oAttach = null;
   oAttach = getNextAttachment(oEmail, ref iAttachCount);

   while (oAttach != null)
   {
      saveAttachment(sEmailID, sExportPath, oAttach);
      oAttach = getNextAttachment(oEmail, ref iAttachCount);
   }

} 

private object getNextAttachment(object oEmail, ref  int iAttachCount)
{
   object oAttach = null;

   try
   {
      iAttachCount++;
      oAttach = GetProperty(oEmail, "Attachments", new object[] { iAttachCount });
   }
   catch //(Exception ex)
   {
      // There was no attachment to be gotten
      oAttach = null;
   }
   return oAttach;
}

Answer 1

只是将其放在这里以防其他人遇到同样的问题。 Outlook 2K7 具有 1 级文件类型功能，可阻止访问具有特定扩展名的附件。

但是，您可以更改注册表以允许访问这些文件。请记住为了安全起见将其设置回修改之前的状态。

private void SetLevel1RemoveValues()

    {
        // Get the base key for the current user HKEY_CURRENT_USER
        Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.RegistryKey.OpenRemoteBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, "");
        // Get the security key from the registry
        Microsoft.Win32.RegistryKey subKey = regKey.OpenSubKey("Software\\Microsoft\\Office\\" + sCurrentOutlookVersion + ".0\\Outlook\\Security", true);

        // If the Outlook\Security key doesn't exit, create one
        if (subKey == null)
            subKey = regKey.CreateSubKey("Software\\Microsoft\\Office\\" + sCurrentOutlookVersion + ".0\\Outlook\\Security");

        // Loop through each Value in the registry to see if the Level1Remove key already exists.
        string[] sValues = subKey.GetValueNames();

        bool bHasLevel1RemoveKey = false;
        foreach (string sValue in sValues)
            if (sValue == "Level1Remove")
                bHasLevel1RemoveKey = true;

        // If the key already exists, store the data so we can reset it later
        if (bHasLevel1RemoveKey)
            sPrevLevel1RemoveValues = subKey.GetValue("Level1Remove").ToString();
        else
            sPrevLevel1RemoveValues = "";

        // Create an array of all Level 1 Extensions
        string[] level1Extensions = new string[] { ".ade", ".adp", ".app", ".asp", ".bas", ".bat", 
            ".cer", ".chm", ".cmd", ".com", ".cpl", ".crt", ".csh", ".exe", ".fxp", ".gadget", 
            ".hlp", ".hta", ".inf", ".ins", ".isp", ".its", ".js", ".jse", ".ksh", ".lnk", 
            ".mad", ".maf", ".mag", ".mam", ".maq", ".mar", ".mas", ".mat", ".mau", ".mav", ".maw", 
            ".mda", ".mdb", ".mde", ".mdt", ".mdw", ".mdz", ".msc", ".msi", ".msp", ".mst", ".ops", 
            ".pcd", ".pif", ".pfr", ".prg", ".pst", ".reg", ".scf", ".scr", ".sct", ".shb", ".shs", 
            ".tmp", ".url", ".vb", ".vbe", ".vbs", ".vsmacros", ".vss", ".vst", ".vsw", 
            ".ws", ".wsc", ".wsf", ".wsh" };

        // Set the value in the registry to the list of all Level 1 extensions so we can extract them
        subKey.SetValue("Level1Remove", string.Join(";", level1Extensions));

        // Close (and save) the values
        subKey.Close();
        regKey.Close();
    }