I can not cancel : "IAsyncOperation<WiFiDirectDevice> iAsynwfdDevice = WiFiDirectDevice::FromIdAsync(deviceInfo.Id(), connctionParameter) "

LI LIU 31

I use the WIFI Direct API: FromIdAsync() to connect to the WiFi direct device. I use the wait_for() method to wait for the connection to time out. When the connection times out, I use the cancel method to cancel the connection. After cancel is invoked, the operation status changes to canceled. But from then on, when I re-initiated a WIFI Direct connection to the device, I immediately reported an EEROR. This process lasts 3 minutes. Then I found that when I cancelled the connection and immediately closed the application, I could still see my application running in the task manager of my computer. How can I gracefully cancel the Wi-Fi Direct connection task? The SDK version is 10.0.19041.0.

Roy Li - MSFT 32,731 Reputation points Microsoft Vendor

2022-04-06T08:46:16.793+00:00

It's a little bit confused about your question. If I understand you correctly, you are using the FromIdAsync method to create a wifi direct device instance, right? Have you checked the status of the target device when you canceled the request? And what's the code that you used?
LI LIU 31 Reputation points

2022-04-06T09:03:42.867+00:00

If I understand you correctly, you are using the FromIdAsync method to create a wifi direct device instance, right? —— yes, I do.
Have you checked the status of the target device when you canceled the request? ——yes, I have checked device status after cancel.

LI LIU 31

            IAsyncOperation<WiFiDirectDevice> iAsynwfdDevice = WiFiDirectDevice::FromIdAsync(deviceInfo.Id(), connctionParameter);
                AsyncStatus pairStatus = iAsynwfdDevice.wait_for(TimeSpan(PAIR_TIMEOUT));
                wfdDevice = iAsynwfdDevice.GetResults();
            if (wfdDevice == nullptr || pairStatus != AsyncStatus::Completed) {
                    if (pairStatus == AsyncStatus::Started) {
                        qDebug() << "FromIdAsync fail errorcode : " << iAsynwfdDevice.ErrorCode() << " status : " << static_cast<int>(pairStatus);
                        iAsynwfdDevice.Cancel();
                       qDebug() <<  " status : " << static_cast<int>(iAsynwfdDevice.Status());
                    } else {
                        qDebug() << "FromIdAsync fail errorcode : " << iAsynwfdDevice.ErrorCode() << " status : " << static_cast<int>(pairStatus);
                    }
                    return false; 
                }

Roy Li - MSFT 32,731 Reputation points Microsoft Vendor

2022-04-06T09:27:59.137+00:00

So what's the status of the wifi direct device that you want to get? Have you tested other wifi direct devices?
LI LIU 31 Reputation points

2022-04-06T09:50:00.713+00:00

Line 6, I got "Started"
Line 8, I got "Canceled"
I have 3 target devices. I name them : A/B/C
Firstly, I used FromIdAsync to connect A. And then I saw a dialog on A's Screen. I purposely didn't click ok button on A, to make FromIdAsync time out. Then, I used FromIdAsync to connect A agin and agin, all the results wereerror.
Secondly, I used FromIdAsync to connect A. And then I saw a dialog on A's Screen. I purposely didn't click ok button on A, to make FromIdAsync time out. Then, I used FromIdAsync to connect B. After a while, the result was error. Then , I used FromIdAsync to connect C. After a while, the result was error too.
LI LIU 31 Reputation points

2022-04-06T09:53:18.513+00:00

The status I got was correct, but the FromIdAsync operation actually was not canceled.
LI LIU 31 Reputation points

2022-04-06T09:55:19.083+00:00

After cancled FromIdAsync operation. I close my APP. But I can see my APP is still running In Task Manager.
LI LIU 31 Reputation points

2022-04-07T00:33:52.477+00:00

Hello, RoyLi. Thanks for your replying yestoday. But now I still can not cancel FromIdAsync operation. Can you help me ?
Roy Li - MSFT 32,731 Reputation points Microsoft Vendor

2022-04-07T02:24:10.133+00:00

Can you remove the Timespan for timeout and just use Cancel method after you call the FromIdAsync method? Also, does the FromIdAsync method return the correct device if you allow the connection?

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I can not cancel : "IAsyncOperation<WiFiDirectDevice> iAsynwfdDevice = WiFiDirectDevice::FromIdAsync(deviceInfo.Id(), connctionParameter) "