我如何使用在C＃中的SerialPort端口对象的DataReceived事件检索？ [英] How do I use dataReceived event of the SerialPort Port Object in C#?

问题描述

我试图创建一个小的应用程序来收集连接到COM10的外部传感器接收到的数据。我已经成功地创建打开的端口，并使用一个for循环流数据文件的时间固定期限的小C＃控制台对象和应用。

我想这个应用程序使用DataReceived事件检索，而不是流转换。看完后的<一个href=\"http://blogs.msdn.com/bclteam/archive/2006/10/10/Top-5-SerialPort-Tips-_5b00_Kim-Hamilton_5D00_.aspx\">Top 5的SerialPort提示，我似乎仍不能以它的工作，不知道我错过了什么。我重写了控制台应用程序，使所有的code是主及以下粘贴。是否有人可以帮助开导我，为什么事件处理程序port_OnReceiveDatazz不会被调用即使我知道，有数据由硬件被发送到端口？

感谢

阿齐姆

PS：感谢<一个href=\"http://stackoverflow.com/questions/466474/how-do-i-use-datareceived-event-of-the-serialport-port-object-in-c#466577\">@Gabe, <一href=\"http://stackoverflow.com/questions/466474/how-do-i-use-datareceived-event-of-the-serialport-port-object-in-c#466510\">@Jason下来和<一个href=\"http://stackoverflow.com/questions/466474/how-do-i-use-datareceived-event-of-the-serialport-port-object-in-c#466518\">@abatishchev所有的建议。我难倒，似乎无法获得事件处理工作。也许它是与该设备。我可以只读取端口中的一个线索和数据流直接到文件住。

---

code

---

 命名空间serialPortCollection
{类​​节目
    {
        静态无效的主要（字串[] args）
        {            const int的由bufSize = 2048;
            字节[] buf中=新的字节[由bufSize] //要存储所接收的数据。            的SerialPort SP =新的SerialPort（COM10，115200）;
            sp.DataReceived + = port_OnReceiveDatazz; //添加DataReceived事件检索处理程序            sp.Open（）;
            sp.WriteLine（$）; //命令启动数据流            //等待数据或用户输入继续。
            到Console.ReadLine（）;            sp.WriteLine（！）; //停止数据流命令
            sp.Close（）;
        }       //我的事件处理程序方法
        私有静态无效port_OnReceiveDatazz（对象发件人，
                                   SerialDataReceivedEventArgs五）
        {
            SPL的SerialPort =（的SerialPort）发送;
            const int的由bufSize = 12;
            字节[] buf中=新的字节[由bufSize]
            Console.WriteLine（接收完毕！）;
            Console.WriteLine（spL.Read（BUF，0，由bufSize））;
        }
    }
}
 

解决方案

我觉得你的问题是该行： **

sp.DataReceived + = port_OnReceiveDatazz;

难道不应该是：

sp.DataReceived + =新SerialDataReceivedEventHandler（port_OnReceiveDatazz）;

**没关系，语法是罚款（不知道在我最初回答了这个问题时的快捷方式）。

我也看到了建议，你应该打开下面的选项为您的串行端口：

  sp.DtrEnable = TRUE; //数据终端就绪
sp.RtsEnable = TRUE; //请求到发送
 

您可能还需要设置握手RequestToSend（通过握手枚举）。​​

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更新：

发现了一个建议，说你应该先打开你的端口，然后分配事件处理程序。也许这是一个错误吗？

因此​​，而不是这样的：

  sp.DataReceived + =新SerialDataReceivedEventHandler（port_OnReceiveDatazz）;
sp.Open（）;
 

做到这一点：

  sp.Open（）;
sp.DataReceived + =新SerialDataReceivedEventHandler（port_OnReceiveDatazz）;
 

让我知道如何继续下去。

I am attempting to create a small application to collect data received from an external sensor attached to COM10. I have successfully created a small C# console object and application that opens the port and streams data to a file for a fixed period of time using a for-loop.

I would like to convert this application to use the dataReceived event to stream instead. After reading the Top 5 SerialPort Tips, I still can't seem to it to work and don't know what I am missing. I rewrote the console application so that all the code is in Main and is pasted below. Can someone please help enlighten me as to why the event handler port_OnReceiveDatazz is not being called even though I know that there is data being sent to the port by the hardware?

Thanks

Azim

PS: Thanks to @Gabe, @Jason Down, and @abatishchev for all the suggestions. I am stumped and can't seem to get the event handler to work. Perhaps it has something to do with the device. I can live with just reading the port in a thread and streaming the data straight to file.

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Code

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namespace serialPortCollection
{   class Program
    {
        static void Main(string[] args)
        {

            const int bufSize = 2048;
            Byte[] buf = new Byte[bufSize]; //To store the received data.

            SerialPort sp = new SerialPort("COM10", 115200);
            sp.DataReceived += port_OnReceiveDatazz; // Add DataReceived Event Handler

            sp.Open();
            sp.WriteLine("$"); //Command to start Data Stream

            // Wait for data or user input to continue.
            Console.ReadLine();

            sp.WriteLine("!"); //Stop Data Stream Command
            sp.Close();
        }

       // My Event Handler Method
        private static void port_OnReceiveDatazz(object sender, 
                                   SerialDataReceivedEventArgs e)
        {
            SerialPort spL = (SerialPort) sender;
            const int bufSize = 12;
            Byte[] buf = new Byte[bufSize];
            Console.WriteLine("DATA RECEIVED!");
            Console.WriteLine(spL.Read(buf, 0, bufSize));
        }
    }
}

解决方案

I think your issue is the line:**

sp.DataReceived += port_OnReceiveDatazz;

Shouldn't it be:

sp.DataReceived += new SerialDataReceivedEventHandler (port_OnReceiveDatazz);

**Nevermind, the syntax is fine (didn't realize the shortcut at the time I originally answered this question).

I've also seen suggestions that you should turn the following options on for your serial port:

sp.DtrEnable = true;    // Data-terminal-ready
sp.RtsEnable = true;    // Request-to-send

You may also have to set the handshake to RequestToSend (via the handshake enumeration).

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UPDATE:

Found a suggestion that says you should open your port first, then assign the event handler. Maybe it's a bug?

So instead of this:

sp.DataReceived += new SerialDataReceivedEventHandler (port_OnReceiveDatazz);
sp.Open();

Do this:

sp.Open();
sp.DataReceived += new SerialDataReceivedEventHandler (port_OnReceiveDatazz);

Let me know how that goes.

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