To get COM port number ( serial, ex : COM1,COM2,,, ) When clicking a button, I want to show available COM Port list on UI. First click success to get COM numbers, but 2nd click failed. Do you have any reason ?To get COM port number ( serial, ex : COM1,COM2
阅读背景：
在第二次调用SerialDevice.FromIdAsync中，UWP，设备COM端口号为NULL
来源：互联网
分享到：
