如何从串口读取数据时申请编码

问题描述

我从一个串口读取数据。我看了这个帖子：

I'm reading data from a serial port. I read this posting: http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/a709d698-5099-4e37-9e10-f66ff22cdd1e

他是写了许多我遇到的问题，但在他的写作，他是指使用：System.Text.Encoding.GetEncoding（视窗1252）。我遇到的问题是何时以及如何应用它。还有在我看来，3 potitional斑点。当串口对象定义：

He is writing about many of the issues I have encounter, but in his writing he refers to using: System.Text.Encoding.GetEncoding("Windows-1252"). The problem I'm having is when and how to apply this. There are three potitional spots in my opinion. When the serial port object is define:

private SerialPort comport = new SerialPort();

事件处理程序：

The Event handler:

comport.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);

或读取数据时：

string data = comport.ReadExisting();

无论身在何处我添加它。我似乎得到错误。一个人怎么会用编码？

No matter where I add it. I seem to get errors. How would one use Encoding?

推荐答案

而不是使用 ReadExisting 中，使用港口的读方法获取字节，然后将它们转换为字符串，与所需的编码，是这样的：

Instead of using ReadExisting, use the port's Read method to get the bytes and then convert them to a string with the desired encoding, like this:

void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    SerialPort port = (SerialPort)sender;
    byte[] data = new byte[port.BytesToRead];
    port.Read(data, 0, data.Length);
    string s = Encoding.GetEncoding("Windows-1252").GetString(data);
}

更新：下面是一个简单的，还是C＃基于若昂的回答-2.0友好的版本。当你实例化你的的SerialPort 对象，设置其编码属性，如下：

Update: Here's a simpler, still-C#-2.0-friendly version based on João's answer. After you instantiate your SerialPort object, set its Encoding property like so:

port.Encoding = Encoding.GetEncoding("Windows-1252");

那么你DataReceived方法就只是这样的：

Then your DataReceived method becomes just this:

void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    SerialPort port = (SerialPort)sender;
    string s = port.ReadExisting();
}

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