Question

我在c＃中使用VSTO。当我点击按钮时，我将附件保存在文件夹中。我的问题是：当我在签名中有一个带有图像的丰富电子邮件时，我的附件中有一个元素。但我不想保存那个图像。 Outlook（应用程序）在区域附件中隐藏此附件！那我为什么不： - （

我的代码很简单：

MailItem MailItemSelected =  this.OutlookItem;   
foreach (Attachment a in MailItemSelected.Attachments)
{
   a.SaveAsFile(path + a.FileName);
}

但我没有找到测试，不保存签名的图像。

Answer 1

我们只需要显示＆＃34;邮件附件＆＃34;

中的（不是用于渲染的嵌入式）用于Outlook插件。这就是它的作用。

 if (mailItem.Attachments.Count > 0)
        {
            // get attachments
            foreach (Attachment attachment in mailItem.Attachments)
            {
                var flags = attachment.PropertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/proptag/0x37140003");

                //To ignore embedded attachments -
                if (flags != 4)
                {
                    // As per present understanding - If rtF mail attachment comes here - and the embeded image is treated as attachment then Type value is 6 and ignore it
                    if ((int)attachment.Type != 6)
                    {

                        MailAttachment mailAttachment = new MailAttachment { Name = attachment.FileName };
                        mail.Attachments.Add(mailAttachment);
                    }

                }

            }
        }

Answer 2

我找到了解决方案的一部分。当您创建电子邮件时，图像嵌入的大小为0.因此您可以排除此。

但是当我阅读电子邮件时，它是不对的。

MailItem MailItemSelected =  this.OutlookItem;   
foreach (Attachment a in MailItemSelected.Attachments)
{                                    
   if(a.Size != 0)
      a.SaveAsFile(path + a.FileName);
}

当我阅读电子邮件时，我找到了一个解决方案，但它并不是很好。所以我写了它，但如果有人认为更好，我喜欢它。在我的例子中，我尝试使用PropertyAccessor获取Flag属性，如果它是一个嵌入图像，那么我可以提出异常。

MailItem MailItemSelected =  this.OutlookItem;   
foreach (Attachment a in MailItemSelected.Attachments)
{
   bool addAttachment = false;
   try
   {
      string schemaPR_ATTACH_FLAGS = "http://schemas.microsoft.com/mapi/proptag/0x37140003"; 
      a.PropertyAccessor.GetProperty(schemaPR_ATTACH_FLAGS);
   }
   catch
   {
      addAttachment = true;
   }

   if (addAttachment && (a.Size != 0))
      a.SaveAsFile(path + a.FileName);
}

Answer 3

看到这个问题有+ 2k点击但仍未得到解答，这是我尝试使用静态实用工具方法返回非内联附件列表：

/// <summary>
/// Method to get all attachments that are NOT inline attachments (like images and stuff).
/// </summary>
/// <param name="mailItem">
/// The mail item.
/// </param>
/// <returns>
/// The <see cref="List"/>.
/// </returns>
public static List<Outlook.Attachment> GetMailAttachments(Outlook.MailItem mailItem) {
    const string PR_ATTACH_METHOD = "http://schemas.microsoft.com/mapi/proptag/0x37050003";
    const string PR_ATTACH_FLAGS = "http://schemas.microsoft.com/mapi/proptag/0x37140003";

    var attachments = new List<Outlook.Attachment>();

    // if this is a plain text email, every attachment is a non-inline attachment
    if (mailItem.BodyFormat == Outlook.OlBodyFormat.olFormatPlain && mailItem.Attachments.Count > 0) {
        attachments.AddRange(
            mailItem.Attachments.Cast<object>().Select(attachment => attachment as Outlook.Attachment));
        return attachments;
    }

    // if the body format is RTF ...
    if (mailItem.BodyFormat == Outlook.OlBodyFormat.olFormatRichText) {
        // add every attachment where the PR_ATTACH_METHOD property is NOT 6 (ATTACH_OLE)
        attachments.AddRange(
            mailItem.Attachments.Cast<object>().Select(attachment => attachment as Outlook.Attachment).Where(thisAttachment => (int)thisAttachment.PropertyAccessor.GetProperty(PR_ATTACH_METHOD) != 6));
    }

    // if the body format is HTML ...
    if (mailItem.BodyFormat == Outlook.OlBodyFormat.olFormatHTML) {
        // add every attachment where the ATT_MHTML_REF property is NOT 4 (ATT_MHTML_REF)
        attachments.AddRange(
            mailItem.Attachments.Cast<object>().Select(attachment => attachment as Outlook.Attachment).Where(thisAttachment => (int)thisAttachment.PropertyAccessor.GetProperty(PR_ATTACH_FLAGS) != 4));
    }

    return attachments;
}

Answer 4

标志解决方法对我没用。我正在为Outlook 2016开发解决方案，我设法使用以下代码过滤附件：

foreach (Attachment attachment in mailItem.Attachments)
            {
                //exclude inline images
                if (!mailItem.HTMLBody.Contains(attachment.FileName))
                {
                    //the attachment is not an inline attachment, YOUR CODE HERE
                }
    }

基本上是在HTML主体中检查标签中是否提到了每个附件。

编辑：如果您在正文中键入其名称，则上一个方法可能会跳过附件。这不像是跳过误报

if (!mailItem.HTMLBody.Contains("cid:" + attachment.FileName))

不要将包含的嵌入图像保存到附件中（如签名图像）

4 个答案: