需要帮助如何使用 graph sdk 5.5 从消息中检索附件

Question

我使用c#代码和graph sdk 5.5来访问office 365邮箱。 我可以通过我的代码阅读所有消息，但无法检索任何附件。 找不到任何适用于 SDK 5.5 的工作示例。

我找到了下面的代码片段，但我不知道从哪里获取“附件 ID”：

var requestInfo = graphClient.Users["{user_id}"]
                             .Messages["{message_id}"]
                             .Attachments["{attachment_id}"]
                             .ToGetRequestInformation();

有人可以帮我解决这个问题吗？

这是我当前的代码：

var credentials = new ClientSecretCredential(directoryTenantID, applicationClientID, secretID);
 var graphServiceClient = new GraphServiceClient(credentials);

 // Read emails from the authenticated user's mailbox
 try
 {
     Microsoft.Graph.Models.MessageCollectionResponse messageCollectionResponse = await graphServiceClient
         .Users["***********"]
         .MailFolders["Inbox"]
         .Messages
         .GetAsync(config => config.QueryParameters.Top = 50);

     var messages = messag`your text`eCollectionResponse.Value;

     foreach (var message in messages)
     {
         var attachments = graphClient.Users["[email protected]"].Messages[message.Id].Attachments.GetAsync();   (get an error on this line)                
         foreach (var attachment in attachments)
         {
             // Save attachment to a specific folder on your hard disk
             // Customize the folder structure based on your needs
             // For example:
             // attachment.Save("C:\\Attachments\\" + attachment.Name);
         }
     }
}

Answer 1

调用异步方法时，使用await关键字确保执行等待操作完成。请参阅下面的 graphServiceClient 附件。

var credentials = new ClientSecretCredential(directoryTenantID, applicationClientID, secretID);
var graphServiceClient = new GraphServiceClient(credentials);

 // Read emails from the authenticated user's mailbox
 try
 {
     Microsoft.Graph.Models.MessageCollectionResponse messageCollectionResponse = await graphServiceClient
         .Users["***********"]
         .MailFolders["Inbox"]
         .Messages
         .GetAsync(config => config.QueryParameters.Top = 50);

     foreach (var message in messages)
     {
         var attachments = await graphServiceClient.Users["***********"]
                                                         .Messages[message.Id]
                                                         .Attachments
                                                         .GetAsync();   

         foreach (var attachment in attachments)
         {

             // For example:
             System.IO.File.WriteAllBytes($"C:\\Attachments\\{fileAttachment.Name}", fileAttachment.ContentBytes);
             Console.WriteLine($"Saved {fileAttachment.Name}");
         }
     }
}