我有一个带有 2 个按钮（BIT 和数据）的图形用户界面。当我按下 BIT 按钮时，它会将十六进制数据发送到连接设备的端口。设备使用另一个十六进制重放。我用 port.DataReceived 函数读取了这个十六进制，将它显示在一个文本框中，并检查每个字节的每一位，并在文本框中显示值的位。这个想法工作正常。当我按下数据按钮时，我将不同的十六进制发送到同一设备，并以不同的十六进制重播。现在我只想显示回放而不检查它。我不知道怎么做，因为当按下数据按钮发送十六进制时，接收来自设备的响应并检查每一位。我不想这样做，我只想以十六进制显示它。如果有人可以帮助我，我会在这里发布我的代码。
我尝试制作两种不同的功能来从设备读取重播，但我认为这种方式不好。我阅读了关于标志的相同内容，我希望这是解决我的问题的更好方法，我想寻求帮助。
我也会在这里发布我的代码。
为什么不分离出 readFromDevice() 代码，并将接收到的值传递回调用方法？这样，您可以根据需要以多种不同的方式处理返回的值。
编辑：
我猜这个设计会异步回复（即它会在你发送数据后一段时间回复）？如果是这种情况，您将需要向 com 端口添加一个事件处理程序，然后处理您收到的数据。
您还需要跟踪单击了哪个按钮。您可以为此使用一个简单的布尔值：
//In the data buttons click handler
DataButtonClicked = true;
BitButtonClicked = false;
//add an event handler to the port
String RecievedData;
SerialPort mySerialPort = new SerialPort("COM1");
mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
//code for the event handler
private static void DataReceivedHandler(
object sender,
SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
RecievedData = sp.ReadExisting();
if(DataButtonClicked)
{
//display the value one way
}
if(BitbuttonClicked)
{
//display the value another way
}
}
我基于我在下面发布的 MSDN 链接。
namespace read_display_data
{公共部分类Form1：表格{
SerialPort port = new SerialPort("COM2", 19200, Parity.None, 8, StopBits.One);
public Form1()
{
InitializeComponent();
port.Open();
}
private void Form1_Load(object sender, EventArgs e)
{
port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceivedBIT);
// port.ReadTimeout = 500;
}
private void BITbutton_Click(object sender, EventArgs e)
{
port.Write(new byte[] { 0x10 0x04, 0x06 }, 0, 3);
byte[] buffer1 = new byte[] { 0x10 0x04, 0x06 };
LogSent(LogMsgType.Outgoing, DateTime.Now + " -- " + ByteArrayToHexString(buffer1) + "\n");
//port.Close();
}
私人无效Databutton_Click（对象发送者，EventArgs e）{
port.Write(new byte[] { 0x11, 0x43, 0x0D}, 0, 3);
byte[] buffer1 = new byte[] {0x11, 0x43, 0x0D };
LogSent(LogMsgType.Outgoing, DateTime.Now + " -- " + ByteArrayToHexString(buffer1) + "\n");
}
private Color[] LogMsgTypeColor = { Color.Blue, Color.Green, Color.Black, Color.Orange, Color.Red };
public enum LogMsgType { Incoming, Outgoing, Normal, Warning, Error };
void port_DataReceivedBIT(object sender, SerialDataReceivedEventArgs e)
{
//port.Open();
this.Invoke(new EventHandler(AddReceiveBIT));
}
private void AddReceiveBIT ( object s, EventArgs e)
{
Thread.Sleep(100);
byte[] buffer = new byte[port.BytesToRead];
port.Read(buffer, 0, buffer.Length);
LogReceive(LogMsgType.Incoming, DateTime.Now + " -- " + ByteArrayToHexString(buffer) + "\n");
Log(LogMsgType.Incoming, checkBit(buffer) + "\n");
}
private string checkBit(byte[] buffer)
{
StringBuilder message = new StringBuilder();
var responseByte = buffer[7];
if ((responseByte & (1 << 0)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 1)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 2)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 3)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 4)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 5)) == 0)
{
message.AppendFormat("rezerved ok ");
}
else
{
message.AppendFormat("rezerved error ");
}
if ((responseByte & (1 << 6)) == 0)
{
message.AppendFormat("Serial Communication ok ");
}
else
{
message.AppendFormat("Serial Communication error ");
}
if ((responseByte & (1 << 7)) == 0)
{
message.AppendFormat("Optical Zoom ok ");
}
else
{
message.AppendFormat("Optical Zoom error ");
}
return message.ToString();
}
private string ByteArrayToHexString(byte[] PortBuffer)
{
StringBuilder sb = new StringBuilder(PortBuffer.Length * 3);
foreach (byte b in PortBuffer)
sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
return sb.ToString().ToUpper();
}
private void LogReceive(LogMsgType msgtype, string msg)
{
richTextBox1.Invoke(new EventHandler(delegate
{
richTextBox1.SelectedText = string.Empty;
richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, FontStyle.Bold);
richTextBox1.SelectionColor = LogMsgTypeColor[(int)msgtype];
richTextBox1.AppendText(msg);
richTextBox1.ScrollToCaret();
}
));
}
private void LogSent(LogMsgType msgtype, string msg)
{
textBox2.Invoke(new EventHandler(delegate
{
textBox2.SelectedText = string.Empty;
textBox2.AppendText(msg);
textBox2.ScrollToCaret();
}
));
}
private void Log(LogMsgType msgtype, string msg)
{
textBox3.Invoke(new EventHandler(delegate
{
textBox3.Clear();
textBox3.SelectedText = string.Empty;
textBox3.AppendText(msg);
textBox3.ScrollToCaret();
}
));
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void label2_Click(object sender, EventArgs e)
{
}
private void label1_Click(object sender, EventArgs e)
{
}
private void textBox3_TextChanged(object sender, EventArgs e)
{
}
private void textBox4_TextChanged(object sender, EventArgs e)
{
}
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
}