我被分配使用 C# 将体重从称重秤 (CAS CI-201A) 显示到文本框中。重量将通过串口 RS-232 或 USB 转换器发送。秤在我身边，但我不知道从哪里开始。我怎样才能实现我的目标？
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48146 次
8 回答
11
你有没有尝试过什么？
如果您想使用串行端口，首先让用户选择使用哪个端口是有意义的。这可以通过使用所有可用端口填充组合框来轻松完成。
private void Form1_Load(object sender, EventArgs e)
{
string[] portNames = SerialPort.GetPortNames();
foreach (var portName in portNames)
{
comboBox1.Items.Add(portName);
}
comboBox1.SelectedIndex = 0;
}
此代码使用一个带有组合框的表单，称为“comboBox1”（默认）。您将需要添加：
using System.IO.Ports;
到 using 指令。
然后在表单中添加一个按钮 (button1) 和一个多行文本框 (textbox1) 并添加以下代码：
private void button1_Click(object sender, EventArgs e)
{
_serialPort = new SerialPort(comboBox1.Text, BaudRate, Parity.None, 8, StopBits.One);
_serialPort.DataReceived += SerialPortOnDataReceived;
_serialPort.Open();
textBox1.Text = "Listening on " + comboBox1.Text + "...";
}
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
while(_serialPort.BytesToRead >0)
{
textBox1.Text += string.Format("{0:X2} ", _serialPort.ReadByte());
}
}
这还需要您添加：
private SerialPort _serialPort;
private const int BaudRate = 9600;
正下方的左括号
public partial class Form1 : Form
单击按钮后，从选定的 comPort 接收到的所有数据将在 TextBox 中显示为十六进制值。
免责声明：上述代码不包含错误处理，如果多次单击 button1 将产生错误，因为之前的“SerialPort”实例未正确关闭。使用此示例时请记住这一点。
问候尼科
完整代码：
using System;
using System.IO.Ports; //<-- necessary to use "SerialPort"
using System.Windows.Forms;
namespace ComPortTests
{
public partial class Form1 : Form
{
private SerialPort _serialPort; //<-- declares a SerialPort Variable to be used throughout the form
private const int BaudRate = 9600; //<-- BaudRate Constant. 9600 seems to be the scale-units default value
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] portNames = SerialPort.GetPortNames(); //<-- Reads all available comPorts
foreach (var portName in portNames)
{
comboBox1.Items.Add(portName); //<-- Adds Ports to combobox
}
comboBox1.SelectedIndex = 0; //<-- Selects first entry (convenience purposes)
}
private void button1_Click(object sender, EventArgs e)
{
//<-- This block ensures that no exceptions happen
if(_serialPort != null && _serialPort.IsOpen)
_serialPort.Close();
if (_serialPort != null)
_serialPort.Dispose();
//<-- End of Block
_serialPort = new SerialPort(comboBox1.Text, BaudRate, Parity.None, 8, StopBits.One); //<-- Creates new SerialPort using the name selected in the combobox
_serialPort.DataReceived += SerialPortOnDataReceived; //<-- this event happens everytime when new data is received by the ComPort
_serialPort.Open(); //<-- make the comport listen
textBox1.Text = "Listening on " + _serialPort.PortName + "...\r\n";
}
private delegate void Closure();
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
if (InvokeRequired) //<-- Makes sure the function is invoked to work properly in the UI-Thread
BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); })); //<-- Function invokes itself
else
{
while (_serialPort.BytesToRead > 0) //<-- repeats until the In-Buffer is empty
{
textBox1.Text += string.Format("{0:X2} ", _serialPort.ReadByte());
//<-- bytewise adds inbuffer to textbox
}
}
}
}
}
于 2012-05-16T08:27:18.063 回答
7
基于此：
监听 COM1... 30 30 33 33 20 49 44 5F 30 30 3A 20 20 20 31 30 2E 36 20 6B 67 20 0D 0A 0D 0A
作为这个的ASCII：
0033 ID_00：10.6 公斤
您可以通过修剪接收到的字符串来获得结果。假设您的侦听器将字节放入数组中byte[] serialReceived：
string reading = System.Text.Encoding.UTF8.GetString(serialReceived);
textBox1.Text = reading.Substring(13);
于 2012-05-18T16:52:59.913 回答
5
首先，在您开始编写任何代码之前，我会检查您是否使用了正确的电缆。尝试打开您选择的串行终端（HyperTerm、putty）并检查是否有任何数据。
确保在体重秤和终端程序上配置相同的波特率、停止位和奇偶校验。
如果您收到数据（终端程序至少应该显示一些垃圾），那么您可以继续编码。如果没有，请检查您是否使用了正确的电缆（nullmodem aka cross-over）。
当你走到这一步时，你可以使用SerialPortC# 的类
http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx
于 2012-05-16T08:11:38.287 回答
2
根据亚当的建议，我将输出转换为人类可读的格式（从 ASCII 到 UTF8）我将字节放入数组 byte[]
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
if (InvokeRequired) //<-- Makes sure the function is invoked to work properly in the UI-Thread
BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); })); //<-- Function invokes itself
else
{
int dataLength = _serialPort.BytesToRead;
byte[] data = new byte[dataLength];
int nbrDataRead = _serialPort.Read(data, 0, dataLength);
if (nbrDataRead == 0)
return;
string str = System.Text.Encoding.UTF8.GetString(data);
textBox1.Text = str.ToString();
}
}
这是完整的工作代码
using System;
using System.IO.Ports; //<-- necessary to use "SerialPort"
using System.Windows.Forms;
namespace ComPortTests
{
public partial class Form1 : Form
{
private SerialPort _serialPort; //<-- declares a SerialPort Variable to be used throughout the form
private const int BaudRate = 9600; //<-- BaudRate Constant. 9600 seems to be the scale-units default value
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] portNames = SerialPort.GetPortNames(); //<-- Reads all available comPorts
foreach (var portName in portNames)
{
comboBox1.Items.Add(portName); //<-- Adds Ports to combobox
}
comboBox1.SelectedIndex = 0; //<-- Selects first entry (convenience purposes)
}
private void button1_Click(object sender, EventArgs e)
{
//<-- This block ensures that no exceptions happen
if(_serialPort != null && _serialPort.IsOpen)
_serialPort.Close();
if (_serialPort != null)
_serialPort.Dispose();
//<-- End of Block
_serialPort = new SerialPort(comboBox1.Text, BaudRate, Parity.None, 8, StopBits.One); //<-- Creates new SerialPort using the name selected in the combobox
_serialPort.DataReceived += SerialPortOnDataReceived; //<-- this event happens everytime when new data is received by the ComPort
_serialPort.Open(); //<-- make the comport listen
textBox1.Text = "Listening on " + _serialPort.PortName + "...\r\n";
}
private delegate void Closure();
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
if (InvokeRequired) //<-- Makes sure the function is invoked to work properly in the UI-Thread
BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); })); //<-- Function invokes itself
else
{
int dataLength = _serialPort.BytesToRead;
byte[] data = new byte[dataLength];
int nbrDataRead = _serialPort.Read(data, 0, dataLength);
if (nbrDataRead == 0)
return;
string str = System.Text.Encoding.UTF8.GetString(data);
textBox1.Text = str.ToString();
}
}
}
如果您使用的是 A&D EK V 校准型号：和 EK-610V。你已经使用 BaudRate = 2400; 和数据位 = 7
注意：如果你得到这样的输出
您必须检查 BaudRate、DataBits（请参阅您的称重机手册）或检查您的电缆
于 2016-10-30T11:52:32.280 回答
2
我使用的是 Anto sujesh 的代码，但我遇到的问题是我从秤中获得的一些值已损坏。我通过缓冲缓存文件中的值来解决它。
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
if (InvokeRequired) //<-- Makes sure the function is invoked to work properly in the UI-Thread
BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); })); //<-- Function invokes itself
else
{
int dataLength = _serialPort.BytesToRead;
byte[] data = new byte[dataLength];
int nbrDataRead = _serialPort.Read(data, 0, dataLength);
if (nbrDataRead == 0)
return;
string str = Encoding.UTF8.GetString(data);
//Buffers values in a file
File.AppendAllText("buffer1", str);
//Read from buffer and write into "strnew" String
string strnew = File.ReadLines("buffer1").Last();
//Shows actual true value coming from scale
textBox5.Text = strnew;
于 2017-03-23T15:23:28.933 回答
0
using System;
using System.IO.Ports;
using System.Windows.Forms;
namespace ComPortTests
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private SerialPort _serialPort = null;
private void Form1_Load(object sender, EventArgs e)
{
_serialPort = new SerialPort("COM1", 9600, Parity.None, 8);
_serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived);
_serialPort.Open();
}
void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
string data = _serialPort.ReadExisting();
textBox2.Text = data;
}
}
}
于 2017-03-23T05:18:45.890 回答
0
我正在使用 连接到我的串口的yaohua xk3190-a9体重秤。在尝试了很多代码之后，下面的代码终于为我工作了。我在这里粘贴代码，以便如果有人使用相同的设备可以获得帮助。
private SerialPort _serialPort;
private const int BaudRate = 2400;
private void Form1_Load(object sender, EventArgs e)
{
string[] portNames = SerialPort.GetPortNames();
foreach (var portName in portNames)
{
comboBox1.Items.Add(portName);
}
comboBox1.SelectedIndex = 0;
//<-- This block ensures that no exceptions happen
if (_serialPort != null && _serialPort.IsOpen)
_serialPort.Close();
if (_serialPort != null)
_serialPort.Dispose();
//<-- End of Block
_serialPort = new SerialPort(comboBox1.Text, BaudRate, Parity.None, 7, StopBits.One); //<-- Creates new SerialPort using the name selected in the combobox
_serialPort.DataReceived += SerialPortOnDataReceived; //<-- this event happens everytime when new data is received by the ComPort
_serialPort.Open(); //<-- make the comport listen
}
private delegate void Closure();
private void SerialPortOnDataReceived(object sender, SerialDataReceivedEventArgs serialDataReceivedEventArgs)
{
if (InvokeRequired) //<-- Makes sure the function is invoked to work properly in the UI-Thread
BeginInvoke(new Closure(() => { SerialPortOnDataReceived(sender, serialDataReceivedEventArgs); })); //<-- Function invokes itself
else
{
string data = _serialPort.ReadExisting();
if (data != null)
{
if (data.ToString() != "")
{
if (data.Length > 6)
{
var result = data.Substring(data.Length - 5);
textBox1.Text = result.ToString().TrimStart(new Char[] { '0' });
}
}
}
}
}
于 2020-07-31T17:02:52.217 回答
0
using System;
using System.IO;
using System.IO.Ports;
namespace comport
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private SerialPort _serialPort = null;
private void Form1_Load(object sender, EventArgs e)
{
AppConfiguration.sConfigType = "default";
_serialPort = new SerialPort("COM1", 9600, Parity.None, 8);
_serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived);
_serialPort.Open();
}
void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
string data = _serialPort.ReadExisting();
textBox2.Text = data;
}
}
}
于 2017-03-23T05:31:45.937 回答