How to deal with timeouts in botframework SDK3 C#

问题

I'm so sorry that I'm a newbie that I have so many questions.

My Bot state is save in DB. So it would never timeout. And I use teams. But I want to restart conversation if user don't reply for 10 minutes.

This is my solution. According this, I also made a static dictionary which could help me to handle every conversations' timer easily. And with the help of Sample Code, I did interrupt the stack. But once it's finished, it will be back to the original conversation. To solve this problem. I cleared the state according this

回答1:

I'm sure there are a number of ways to solve this but here is one way you can try.

In your Global.asax

Define this cancellation token source for your thread

 CancellationTokenSource _getTokenAsyncCancellation = new CancellationTokenSource();

In Application_Start() code setup a Task thread with a while loop. It will look something like this:

Task.Factory.StartNew(async () =>
            {
                while (!_getTokenAsyncCancellation.IsCancellationRequested)
                {
                    try
                    {
                        //Check timespan between last message timestamp vs NOW
                        //if timespan > 9 minutes
                        //   send message 
                    }
                    catch (Exception ex)
                    {
                        Trace.TraceError(ex.Message);
                    }
                    await Task.Delay(TimeSpan.FromMinutes(1), _getTokenAsyncCancellation.Token).ConfigureAwait(false);
                }
            }).ConfigureAwait(false);

Also, add an Application_edn method to sht things down cleanly

protected void Application_End()
        {
            _getTokenAsyncCancellation.Cancel();
        }

Now, you're not quite done. You will also need somewhat to track the user's last message timestamp. Basically, each time the bot receives a new message from the user yo will set this timestamp and the code in your while loop will check against that.

I hope this helps and gives you some ideas on what to try.

来源：https://stackoverflow.com/questions/52073731/how-to-deal-with-timeouts-in-botframework-sdk3-c-sharp

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botframework