C # Dynamic acquisition of native available serial port two ways

1.

Private voidGetserialport ()//get the serial port list{RegistryKey keycom= Registry.LocalMachine.OpenSubKey ("Hardware\\devicemap\\serialcomm"); if(Keycom! =NULL)    {        string[] Ssubkeys =Keycom.getvaluenames (); foreach(stringSNameinchSsubkeys) {            stringsvalue = (string) Keycom.getvalue (sName); }    }}

2. There is also a relatively simple, direct access through the SerialPort object

string [] ports = System.IO.Ports.SerialPort.GetPortNames ();

The following things are turned around.

The SerialPort class is provided in the. NET Framework 2.0, which mainly implements serial data communication and so on. The main properties of the Class (table 13.1) and methods (table 13.2) are described below.

Table 13.1 Common properties of the SerialPort class

Name	Description
BaseStream	Gets the underlying Stream object of the SerialPort object
BaudRate	Gets or sets the serial baud rate
Breakstate	Gets or sets the interrupt signal status
Bytestoread	Gets the number of bytes of data in the receive buffer
Bytestowrite	Gets the number of bytes of data in the send buffer
Cdholding	Gets the status of the port's carrier detection line
Ctsholding	Get the status of a "can send" row
DataBits	Gets or sets the standard data bit length for each byte
Discardnull	Gets or sets a value that indicates whether Null bytes are ignored when transferred between the port and the receive buffer
Dsrholding	Get the status of the data Set Ready (DSR) signal
Dtrenable	Gets or sets a value that enables the data Terminal ready (DTR) signal during serial communication
Encoding	Gets or sets the byte encoding of the text conversion before and after the transfer
Handshake	Gets or sets the handshake protocol for serial port data transfer
IsOpen	Gets a value that indicates the open or closed state of the SerialPort object
NewLine	Gets or sets the value used to interpret the end of the ReadLine () and WriteLine () method calls
Parity	Gets or sets the parity check protocol

Continuation table

Name	Description
Parityreplace	Gets or sets a byte that replaces invalid bytes in the data stream when a parity error occurs
PortName	Gets or sets the communication port, including but not limited to all available COM ports
Readbuffersize	Gets or sets the size of the SerialPort input buffer
ReadTimeout	Gets or sets the number of milliseconds before a time-out occurs when the read operation does not complete
Receivedbytesthreshold	Gets or sets the number of bytes in the internal input buffer before the DataReceived event occurs
Rtsenable	Gets or sets a value that indicates whether the request-send (RTS) signal is enabled in serial communication
StopBits	Gets or sets the standard number of stop bits per byte
Writebuffersize	Gets or sets the size of the serial port output buffer
WriteTimeout	Gets or sets the number of milliseconds before a time-out occurs when the write operation does not complete

Table 13.2 Common methods of SerialPort class

Method name	Description
Close	Close the port connection, set the IsOpen property to False, and release the internal Stream object
Open	Open a new serial port connection
Read	Read from the SerialPort input buffer
ReadByte	Reads a byte synchronously from the SerialPort input buffer
ReadChar	Synchronously reads a character from the SerialPort input buffer
ReadLine	Read the NewLine value in the input buffer all the time
Readto	A string that has been read to the specified value in the input buffer
Write	is overloaded. Writing data to the serial port output buffer
WriteLine	Writes the specified string and NewLine values to the output buffer

C # Dynamic acquisition of native available serial port two ways