C＃：适当的方法来关闭与的WinForms的SerialPort [英] C#: Proper way to close SerialPort with Winforms

问题描述

我有，我从阅读的serialport一个应用程序，一切顺利，直到我关闭应用程序。当我点击[X]应用程序只是挂，用户界面：反应迟钝

我从DataReceived事件检索处理程序的端口读，我关闭端口时， FormClosed情况：

 私人无效MainForm_FormClosed（对象发件人，FormClosedEventArgs E）
 {
 mySerialPort.Close（ ）; 
} 
  

解决方案

这不是一个错误。

当您关闭它是因为在你的SerialPort对象的事件处理程序，你用同步主线程调用它会挂起的唯一原因（通常通过调用调用）。的SerialPort的close方法等待其EventLoopRunner线程时触发DataReceived /错误/ PinChanged事件终止，但由于在事件您自己的代码也在等待主线程响应，你碰到一个死锁情况。

错误报告被关闭作为设计的的原因是因为错误是你自己的代码。

I have an app where I read from the serialport, everything goes fine, until I close the app. When I click on the [X] the app simply hangs, the UI: unresponsive.

I read from the port in the DataReceived event handler, and I close the port when FormClosed happens:

    private void MainForm_FormClosed(object sender, FormClosedEventArgs e)
    {
        mySerialPort.Close();
    }

解决方案

It's not a bug.

The only reason it would hang when you close it is because in the event handler of your SerialPort object, you're synchronizing a call with the main thread (typically by calling invoke). SerialPort's close method waits for its EventLoopRunner thread which fires DataReceived/Error/PinChanged events to terminate, but since your own code in the event is also waiting for main thread to respond, you run into a dead lock situation.

The reason the bug report was closed 'as designed' is because the 'bug' is in your own code.

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