蓝牙USB断开连接时应用程序崩溃(使用串行端口类)

问题描述

我正在使用从基本SerialPort类派生的以下CustomSerialPort类.

当我从PC/Notebok中删除Bluetooth USB设备时，我不知道为什么我仍然遇到串行端口崩溃/应用程序崩溃的异常.这是我正在使用的课程:

I am using the following CustomSerialPort class derived from base SerialPort class.

Don''t know why i am still getting the exception of Serial Port crashing / Application crashing when i am removing the Bluetooth USB device from my PC/Notebok. Here is the class i am using:

public partial class CustomSerialPort : SerialPort
    {
        public CustomSerialPort(string port)
            : base(port)
        {

        }
        public new bool Open()
        {
            try
            {
                base.Open();

                /*
                ** because of the issue with the FTDI USB serial device,
                ** the call to the stream's finalize is suppressed
                **
                ** it will be un-suppressed in Dispose if the stream
                ** is still good
                */
                GC.SuppressFinalize(BaseStream);
            }
            catch(Exception ex)
            {
                return false;
            }
            return true;
        }

        public new void Dispose()
        {
            Dispose(true);
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing && (base.Container != null))
            {
                base.Container.Dispose();
            }

            try
            {
                var stream = (Stream)typeof(SerialPort).GetField("internalSerialStream", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(this);

                if (stream != null)
                {
                    try
                    {
                        stream.Dispose();
                    }
                    catch (Exception ex)
                    {
                    }
                }

                /*
                ** because of the issue with the FTDI USB serial device,
                ** the call to the stream's finalize is suppressed
                **
                ** an attempt to un-suppress the stream's finalize is made
                ** here, but if it fails, the exception is caught and
                ** ignored
                */
                GC.ReRegisterForFinalize(BaseStream);
            }
            catch(Exception ex)
            {
            }

            base.Dispose(disposing);
        }

        public new bool Close()
        {
            try
            {
                base.Close();
            }
            catch (Exception ex)
            {
                return false;
            }

            return true;
        }
    }

有人可以建议我至少如何处理此类异常吗?

Can anyone suggest me how to handle at least such exceptions?

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