串口重新连接 [英] Serial port reconnecting

问题描述

我将RS232电缆从计算机中取出了.

我运行我的应用程序并尝试连接到端口.

当然，连接失败.

我将RS232电缆连接到计算机.

我尝试再次连接端口.

再次，我失败了.

我现在可以连接的唯一方法是关闭应用程序，然后再次运行.

我似乎无法清洁某些东西，但是我不知道该怎么办...

我的关闭函数如下:

公开

{

"， ，

{

{

m_Port.Close();

}

m_Port.Dispose();

m_Port =

例外 例如)

{

System.Windows.Forms.

+ ex.StackTrace); 解决方案

不要检查它是否打开.将其关闭并忽略该异常.那就是"我将RS232电缆从计算机中取出了. 我运行我的应用程序并尝试连接到端口. 当然，连接会失败. 我将RS232电缆连接到了计算机. 我尝试再次连接端口. 再次，我失败了."

关闭端口并忽略异常，您应该能够打开端口.

Hi,

My application need to communicate a periferial using RS-232. My computer is connected to the periferial by RS232-to-USB of Prolific.

I’m trying to reconnect after the following scenario:

I take the RS232 cable out of the computer.

I run my application and try to connect to the port.

Of course, the connection fails.

I connect the RS232 cable to the computer.

I try to connect the port again.

And again, I fail.

The only way I can connect now is by closing the application and running it again.

It looks like I fail to clean something, but I don't know what...

My close function looks like this:

public

override void Close()

{

Log4NetWrapper.Instance.LogDebug("Rs232Communicator", "Closing", "");

try

{

if (m_Port != null && m_Port.IsOpen == true)

{

m_Port.Close();

}

m_Port.Dispose();

m_Port =

null;

}

catch (Exception ex)

{

System.Windows.Forms.

MessageBox.Show(ex.Message + "\r\n" + ex.StackTrace);

}

}

解决方案

Don't check if it's Open.  Close it and ignore the exception.  That is "I take the RS232 cable out of the computer.  I run my application and try to connect to the port.  Of course, the connection fails.  I connect the RS232 cable to the computer.  I try to connect the port again.  And again, I fail."

Close the port and ignore the exception and you should be able to Open the port.

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