如何使用C#发送Microsoft botframework sdk v4本地文件夹中的图像 [英] how to send images which are in local folder in microsoft botframework sdk v4 using c#

问题描述

我使用Microsoft Botframework C#SDK V4创建了一个机器人，并且运行良好.现在，我想向该机器人添加一些图像.我正在使用卡片，但是卡片仅使用图像的网址.我要发送本地文件夹中的图像.我如何使它工作?

I created a bot with Microsoft Botframework C# SDK V4 and it is working well. Now I want to add some images to that bot. I am using cards but cards are taking only url of an image. I want to send the images which are in my local folder. How can I make it work??

我已经尝试过使用15.handling附件github repo(

I already tried this with 15.handling attachments github repo(https://github.com/Microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/15.handling-attachments). And while I am using the exact code in handling attachments github repo, I am getting the below exception stacktrace for inline attachments.

Sorry, it looks like something went wrong.’ at Microsoft.Bot.Connector.Conversations.d__10.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Connector.ConversationsExtensions.d__17.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.BotFrameworkAdapter.d__15.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.TurnContext.<>c__DisplayClass22_0. 
<g__SendActivitiesThroughAdapter|1>d.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.TurnContext.d__21.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.BotBuilderSamples.AttachmentsBot.d__0.MoveNext() in 
C:\botbuilder-samples\samples\csharp_dotnetcore\15.handling-attachments\AttachmentsBot.cs:line 65
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.MiddlewareSet.d__3.MoveNext()
 — End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.BotAdapter.d__13.MoveNext()’

如何解决此问题?

推荐答案

The 15.handling-attachments sample demonstrates how to read a local file, and attach it as a base64 encoded image:

reply.Attachments = new List<Attachment>() { GetInlineAttachment() };

private static Attachment GetInlineAttachment()
{
    var imagePath = Path.Combine(Environment.CurrentDirectory, @"Resources\architecture-resize.png");
    var imageData = Convert.ToBase64String(File.ReadAllBytes(imagePath));

    return new Attachment
    {
        Name = @"Resources\architecture-resize.png",
        ContentType = "image/png",
        ContentUrl = $"data:image/png;base64,{imageData}",
    };
}

另一种选择是使用ConnectorClient的 UploadAttachmentAsync API:

Another option is to use the ConnectorClient's UploadAttachmentAsync api:

private async Task SendFile(ITurnContext turnContext)
{
    var webRoot = _env.ContentRootPath;
    var imagePath = System.IO.Path.Combine(webRoot, "Resources", "BotFrameworkDiagram.png");
    var connector = turnContext.TurnState.GetValueOrDefault("Microsoft.Bot.Connector.IConnectorClient") as ConnectorClient;

    var attachments = new Attachments(connector);
    var response = await attachments.Client.Conversations.UploadAttachmentAsync(
        turnContext.Activity.Conversation.Id,
        new AttachmentData
        {
            Name = "BotFrameworkDiagram.png",
            OriginalBase64 = File.ReadAllBytes(imagePath),
            Type = "image/png"
        });

    var attachmentUri = attachments.GetAttachmentUri(response.Id);

    var attachment = new Attachment
    {
        Name = "BotFrameworkDiagram.png",
        ContentType = "image/png",
        ContentUrl = attachmentUri
    };

    var reply = turnContext.Activity.CreateReply();
    reply.Attachments.Add(attachment);
    await turnContext.SendActivityAsync(reply);   
}

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