[英]Accepting attachments on a waterfall dialog and storing them locally in bot framework v4
I was trying to add a functionality to take input-attachments from the user, basically trying to merge the handling-attachments bot sample from bot framework and my custom waterfall dialog.我试图添加一个功能来从用户那里获取输入附件,基本上是试图合并来自机器人框架的处理附件机器人示例和我的自定义瀑布对话框。
But how do you access iturncontext functions in the waterfall dialog?但是如何在瀑布对话框中访问 iturncontext 函数呢? . . Below is a explanation of my code.下面是我的代码的解释。
One of my waterfall step:我的瀑布步骤之一:
private async Task<DialogTurnResult> DescStepAsync2(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
stepContext.Values["Title"] = (string)stepContext.Result;
await stepContext.Context.SendActivityAsync(MessageFactory.Text("upload a image"), cancellationToken);
var activity = stepContext.Context.Activity;
if (activity.Attachments != null && activity.Attachments.Any())
{
Activity reply = (Activity)HandleIncomingAttachment(stepContext.Context.Activity);
return await stepContext.PromptAsync(nameof(TextPrompt), new PromptOptions { Prompt = reply }, cancellationToken);
}
else
{
var reply = MessageFactory.Text("else image condition thrown");
// reply.Attachments.Add(Cards.GetHeroCard().ToAttachment());
return await stepContext.PromptAsync(nameof(TextPrompt), new PromptOptions { Prompt = reply }, cancellationToken);
}
}
Here is the HandleIncomingAttachment function which i borrowed from bot builder samples linked above.这是我从上面链接的机器人构建器示例中借来的 HandleIncomingAttachment function。
private static IMessageActivity HandleIncomingAttachment(IMessageActivity activity)
{
string replyText = string.Empty;
foreach (var file in activity.Attachments)
{
// Determine where the file is hosted.
var remoteFileUrl = file.ContentUrl;
// Save the attachment to the system temp directory.
var localFileName = Path.Combine(Path.GetTempPath(), file.Name);
// Download the actual attachment
using (var webClient = new WebClient())
{
webClient.DownloadFile(remoteFileUrl, localFileName);
}
replyText += $"Attachment \"{file.Name}\"" +
$" has been received and saved to \"{localFileName}\"\r\n";
}
return MessageFactory.Text(replyText);
}
Here is the transcript of the conversation:以下是谈话记录:
EDIT: i have edited my code to this, it still doesnt wait for me to upload a attachment.just finishes the step.编辑:我已经编辑了我的代码,它仍然不等我上传附件。只需完成这一步。
private async Task<DialogTurnResult> DescStepAsync2(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
stepContext.Values["Desc"] = (string)stepContext.Result;
var reply = (Activity)ProcessInput(stepContext.Context);
return await stepContext.PromptAsync(nameof(AttachmentPrompt), new PromptOptions { Prompt = reply }, cancellationToken);
}
process input function:过程输入 function:
private static IMessageActivity ProcessInput(ITurnContext turnContext)
{
var activity = turnContext.Activity;
IMessageActivity reply = null;
if (activity.Attachments != null && activity.Attachments.Any())
{
// We know the user is sending an attachment as there is at least one item .
// in the Attachments list.
reply = HandleIncomingAttachment(activity);
}
else
{
reply = MessageFactory.Text("No attachement detected ");
// Send at attachment to the user.
}
return reply;
}
A WaterfallStepContext
inherits from DialogContext
and therefore the ITurnContext
can be accessed through its Context
property. WaterfallStepContext
继承自DialogContext
,因此可以通过其Context
属性访问ITurnContext
。 The waterfall step code you posted already does this when it uses stepContext.Context.SendActivityAsync
or stepContext.Context.Activity
.您发布的瀑布步骤代码在使用stepContext.Context.SendActivityAsync
或stepContext.Context.Activity
时已经执行此操作。
so i figured this out, thanks to this post: github.com/microsoft/botframework-sdk/issues/5312所以我想通了,感谢这篇文章:github.com/microsoft/botframework-sdk/issues/5312
how my code looks now:我的代码现在看起来如何:
declaring a attachment prompt:声明附件提示:
public class CancelDialog : ComponentDialog
{
private static string attachmentPromptId = $"{nameof(CancelDialog)}_attachmentPrompt";
public CancelDialog()
: base(nameof(CancelDialog))
{
// This array defines how the Waterfall will execute.
var waterfallSteps = new WaterfallStep[]
{
TitleStepAsync,
DescStepAsync,
// AskForAttachmentStepAsync,
UploadAttachmentAsync,
UploadCodeAsync,
SummaryStepAsync,
};
// Add named dialogs to the DialogSet. These names are saved in the dialog state.
AddDialog(new WaterfallDialog(nameof(WaterfallDialog), waterfallSteps));
AddDialog(new TextPrompt(nameof(TextPrompt)));
AddDialog(new NumberPrompt<int>(nameof(NumberPrompt<int>), AgePromptValidatorAsync));
AddDialog(new ChoicePrompt(nameof(ChoicePrompt)));
AddDialog(new ConfirmPrompt(nameof(ConfirmPrompt)));
AddDialog(new AttachmentPrompt(attachmentPromptId));
ask for attachment prompt in the waterfall:在瀑布中询问附件提示:
private async Task<DialogTurnResult> UploadAttachmentAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
stepContext.Values["desc"] = (string)stepContext.Result;
// if ((bool)stepContext.Result)
{
return await stepContext.PromptAsync(
attachmentPromptId,
new PromptOptions
{
Prompt = MessageFactory.Text($"Can you upload a file?"),
});
}
//else
//{
// return await stepContext.NextAsync(-1, cancellationToken);
//}
}
processing the file and storing it:处理文件并存储它:
private async Task<DialogTurnResult> UploadCodeAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
{
List<Attachment> attachments = (List<Attachment>)stepContext.Result;
string replyText = string.Empty;
foreach (var file in attachments)
{
// Determine where the file is hosted.
var remoteFileUrl = file.ContentUrl;
// Save the attachment to the system temp directory.
var localFileName = Path.Combine(Path.GetTempPath(), file.Name);
// Download the actual attachment
using (var webClient = new WebClient())
{
webClient.DownloadFile(remoteFileUrl, localFileName);
}
replyText += $"Attachment \"{file.Name}\"" +
$" has been received and saved to \"{localFileName}\"\r\n";
}}
hope you get a idea.希望你有一个想法。 thank you @Kyle and @Michael谢谢@Kyle 和@Michael
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