Question

在Outlook帐户中收到电子邮件时，我想将附件保存到AWS存储桶中。我尝试使用具有HttpPostedFileBase属性的InputStream。

我尝试如下

//successfully saving 'HttpPostedFileBase' files

using (IAmazonS3 s3client = new AmazonS3Client(_awsAccessKey, _awsSecretKey, RegionEndpoint.USEast1)) {
    PutObjectRequest putObjectRequest = new PutObjectRequest {
        BucketName = _bucketName,
        CannedACL = S3CannedACL.PublicRead,
        Key = string.Format("uploads/" + AssignedTaskId.ToString() + "/" + Path.GetFileName(postedFile.FileName)),
        InputStream = postedFile.InputStream
    };
    s3client.PutObject(putObjectRequest);
}

//but cannot get from Outlook.MailItem attachments

Outlook.MailItem newEmail = null;
foreach (object collectionItem in inBoxItems) {
    newEmail = collectionItem as Outlook.MailItem;
}
using (IAmazonS3 s3client = new AmazonS3Client(_awsAccessKey, _awsSecretKey, RegionEndpoint.USEast1)) {
    PutObjectRequest putObjectRequest = new PutObjectRequest {
        BucketName = _bucketName,
        CannedACL = S3CannedACL.PublicRead,
        Key = string.Format("uploads/{0}", newEmail.Attachments[i].FileName),
        InputStream = newEmail.Attachments[i].InputStream
    };
    s3client.PutObject(putObjectRequest);
}
}

遇到错误：

“附件”不包含“ InputStream”的定义，找不到可访问的扩展方法“ InputStream”，该类型接受第一个类型为“附件”的自变量（您是否缺少using指令或程序集引用？）

Answer 1

Outlook对象模型没有为此提供任何属性。相反，您可以访问一个低级属性：

 const string PR_ATTACH_DATA_BIN = "http://schemas.microsoft.com/mapi/proptag/0x37010102";

 Outlook.Attachment attachment = mail.Attachments[0];  

 // Retrieve the attachment as a byte array
 var attachmentData = attachment.PropertyAccessor.GetProperty(PR_ATTACH_DATA_BIN);

另一种选择是将附件（请参见Attachment.SaveAsFile）保存到文件，然后以字节流的形式打开文件。

如何将Outlook.MailItem附件转换为inputstream？

1 个答案: