有没有办法在bot框架中接受文件作为附件？

Question

我已经发布了我的机器人微软团队。现在我想包括一个功能，其中，用户可以上传文件作为附件&机器人将上传到blob存储，如何在bot框架中处理这个？

Answer 1

用户发送的附件将以IMessageActivity的Attachments集合为结尾。在那里你会找到用户发送的附件的URL。

然后，您将不得不下载附件并添加您的逻辑以将其上传到Blob存储或您想要使用的任何其他存储。

Here是一个C＃示例，显示如何访问和下载用户发送的附件。添加以下代码供您参考：

public virtual async Task MessageReceivedAsync(IDialogContext context, IAwaitable<IMessageActivity> argument) 
{ 
    var message = await argument; 

    if (message.Attachments != null && message.Attachments.Any()) 
    { 
     var attachment = message.Attachments.First(); 
     using (HttpClient httpClient = new HttpClient()) 
     { 
      // Skype attachment URLs are secured by a JwtToken, so we need to pass the token from our bot. 
      if (message.ChannelId.Equals("skype", StringComparison.InvariantCultureIgnoreCase) && new Uri(attachment.ContentUrl).Host.EndsWith("skype.com")) 
      { 
       var token = await new MicrosoftAppCredentials().GetTokenAsync(); 
       httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token); 
      } 

      var responseMessage = await httpClient.GetAsync(attachment.ContentUrl); 

      var contentLenghtBytes = responseMessage.Content.Headers.ContentLength; 

      await context.PostAsync($"Attachment of {attachment.ContentType} type and size of {contentLenghtBytes} bytes received."); 
     } 
    } 
    else 
    { 
     await context.PostAsync("Hi there! I'm a bot created to show you how I can receive message attachments, but no attachment was sent to me. Please, try again sending a new message including an attachment."); 
    } 

    context.Wait(this.MessageReceivedAsync); 
}