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How do I return a Typing activity from my v4 Bot

I'm trying to add a Typing activity to a long-running action in my bot, but I keep getting a "BadGateway" error. Most of the samples I've found seem to be for bot framework v3, so the types or methods don't appear any more, and I've tried a few options for v4 (using C#), like the following:

await turnContext.SendActivityAsync(new Activity() { Type = ActivityTypes.Typing });

or

var typingActivity = new Activity()
{
    Type = ActivityTypes.Typing
    //RelatesTo = turnContext.Activity
};

typingActivity.ApplyConversationReference(typingActivity.GetConversationReference());

or

var act2 = MessageFactory.Text(null);
act2.Type = ActivityTypes.Typing;
await turnContext.SendActivityAsync(act2);

all of these result in a BadGateway error.

Can someone guide me on where I'm going wrong?

Solution

  • The answer of Steven Kanberg has the right code, but unfortunately this is a service issue at the moment, as confirmed in this issue on Github.

    When the issue is resolved, it should be posted in the Github issue above.