如何使用EWS Managed API保存ItemAttachments

Question

可以保存ItemAttachment吗？对于FileAttachment，我们使用以下EWS管理的API代码来保存，

   if(attachment is FileAttachment)
    {
      FileAttachment fAttachment = new FileAttachment();
      fAttachment.Load("D:\\Stream" + fAttachment.Name);
    }

那么对于ItemAttachment呢？我们如何将这样的ItemAttachment保存到指定的文件中？

Answer 1

当然，这不是一个紧迫的问题，但我想我会分享给任何人谁在未来偶然发现这一点，就像我所做的。

对于ItemAttachments，您需要加载项目的MimeContent，然后您可以简单地写入文件/输出".eml"，".msg“

if (attachment is FileAttachment)
{
    FileAttachment fileAttachment = attachment as FileAttachment;

    // Load attachment contents into a file.
    fileAttachment.Load(<file path>);
}
else // Attachment is an ItemAttachment (Email)
{
    ItemAttachment itemAttachment = attachment as ItemAttachment;

    // Load Item with additionalProperties of MimeContent
    itemAttachment.Load(EmailMessageSchema.MimeContent);

    // MimeContent.Content will give you the byte[] for the ItemAttachment
    // Now all you have to do is write the byte[] to a file
    File.WriteAllBytes(<file path>, itemAttachment.Item.MimeContent.Content);
}