数据到来时C#只读串口 [英] C# read only Serial port when data comes

问题描述

我想读取我的串口，但只有在数据到来时(我不想轮询).

I want read my serial port but only when data comes(I want not polling).

我就是这样做的.

                Schnittstelle = new SerialPort("COM3");
                Schnittstelle.BaudRate = 115200;
                Schnittstelle.DataBits = 8;
                Schnittstelle.StopBits = StopBits.Two;
             ....

然后我开始一个线程

             beginn = new Thread(readCom);
             beginn.Start();

在我的 readCom 中，我正在连续阅读(轮询:()

and in my readCom I'm reading continuous (polling :( )

private void readCom()
    {

        try
        {
            while (Schnittstelle.IsOpen)
            {

                Dispatcher.BeginInvoke(new Action(() =>
                {

                    ComWindow.txtbCom.Text = ComWindow.txtbCom.Text + Environment.NewLine + Schnittstelle.ReadExisting();
                    ComWindow.txtbCom.ScrollToEnd();
                }));

                beginn.Join(10);

            }
        }
        catch (ThreadAbortException) 
        {

        }

        catch (Exception ex)
        {
            System.Windows.Forms.MessageBox.Show(ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

我希望你在中断到来时阅读.但是我该怎么做呢?

I want yout read when a Interrupt is coming. But how can I do that ?

推荐答案

您必须向 DataReceived 事件添加一个 eventHandler.

You will have to add an eventHandler to the DataReceived event.

以下是来自 msdn.microsoft.com 的示例，并进行了一些修改:查看评论！:

Below is an example from msdn.microsoft.com, with some edits: see comments!:

public static void Main()
{
    SerialPort mySerialPort = new SerialPort("COM1");

    mySerialPort.BaudRate = 9600;
    mySerialPort.Parity = Parity.None;
    mySerialPort.StopBits = StopBits.One;
    mySerialPort.DataBits = 8;
    mySerialPort.Handshake = Handshake.None;

    mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);

    mySerialPort.Open();

    Console.WriteLine("Press any key to continue...");
    Console.WriteLine();
    Console.ReadKey();
    mySerialPort.Close();
}

private static void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
    SerialPort sp = (SerialPort)sender;
    string indata = sp.ReadExisting();
    Debug.Print("Data Received:");
    Debug.Print(indata);
}

每次数据进入时，DataReceivedHandler 都会触发并将您的数据打印到控制台.我认为你应该能够在你的代码中做到这一点.

Everytime data comes in, the DataReceivedHandler will trigger and prints your data to the console. I think you should be able to do this in your code.

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