Serial Ports
Serial Port Rs-232
Serial Port Settings Windows 10

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Definition

Inheritance

MarshalByRefObjectMarshalByRefObjectMarshalByRefObjectMarshalByRefObject

SerialPortSerialPortSerialPortSerialPort

Examples

The following code example demonstrates the use of the SerialPort class to allow two users to chat from two separate computers connected by a null modem cable. In this example, the users are prompted for the port settings and a username before chatting. Both computers must be executing the program to achieve full functionality of this example.

Remarks

Use this class to control a serial port file resource. This class provides synchronous and event-driven I/O, access to pin and break states, and access to serial driver properties. Additionally, the functionality of this class can be wrapped in an internal Stream object, accessible through the BaseStream property, and passed to classes that wrap or use streams.

The SerialPort class supports the following encodings: ASCIIEncoding, UTF8Encoding, UnicodeEncoding, UTF32Encoding, and any encoding defined in mscorlib.dll where the code page is less than 50000 or the code page is 54936. You can use alternate encodings, but you must use the ReadByte or Write method and perform the encoding yourself.

You use the GetPortNames method to retrieve the valid ports for the current computer.

If a SerialPort object becomes blocked during a read operation, do not abort the thread. Instead, either close the base stream or dispose of the SerialPort object.

Constructors

SerialPort()SerialPort()SerialPort()SerialPort()	Initializes a new instance of the SerialPort class.
SerialPort(IContainer)SerialPort(IContainer)SerialPort(IContainer)SerialPort(IContainer)	Initializes a new instance of the SerialPort class using the specified IContainer object.
SerialPort(String)SerialPort(String)SerialPort(String)SerialPort(String)	Initializes a new instance of the SerialPort class using the specified port name.
SerialPort(String, Int32)SerialPort(String, Int32)SerialPort(String, Int32)SerialPort(String, Int32)	Initializes a new instance of the SerialPort class using the specified port name and baud rate.
SerialPort(String, Int32, Parity)SerialPort(String, Int32, Parity)SerialPort(String, Int32, Parity)SerialPort(String, Int32, Parity)	Initializes a new instance of the SerialPort class using the specified port name, baud rate, and parity bit.
SerialPort(String, Int32, Parity, Int32)SerialPort(String, Int32, Parity, Int32)SerialPort(String, Int32, Parity, Int32)SerialPort(String, Int32, Parity, Int32)	Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, and data bits.
SerialPort(String, Int32, Parity, Int32, StopBits)SerialPort(String, Int32, Parity, Int32, StopBits)SerialPort(String, Int32, Parity, Int32, StopBits)SerialPort(String, Int32, Parity, Int32, StopBits)	Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, data bits, and stop bit.

Fields

InfiniteTimeoutInfiniteTimeoutInfiniteTimeoutInfiniteTimeout

Indicates that no time-out should occur.

Properties

BaseStreamBaseStreamBaseStreamBaseStream	Gets the underlying Stream object for a SerialPort object.
BaudRateBaudRateBaudRateBaudRate	Gets or sets the serial baud rate.
BreakStateBreakStateBreakStateBreakState	Gets or sets the break signal state.
BytesToReadBytesToReadBytesToReadBytesToRead	Gets the number of bytes of data in the receive buffer.
BytesToWriteBytesToWriteBytesToWriteBytesToWrite	Gets the number of bytes of data in the send buffer.
CanRaiseEventsCanRaiseEventsCanRaiseEventsCanRaiseEvents	Gets a value indicating whether the component can raise an event. (Inherited from Component)
CDHoldingCDHoldingCDHoldingCDHolding	Gets the state of the Carrier Detect line for the port.
ContainerContainerContainerContainer	Gets the IContainer that contains the Component. (Inherited from Component)
CtsHoldingCtsHoldingCtsHoldingCtsHolding	Gets the state of the Clear-to-Send line.
DataBitsDataBitsDataBitsDataBits	Gets or sets the standard length of data bits per byte.
DesignModeDesignModeDesignModeDesignMode	Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component)
DiscardNullDiscardNullDiscardNullDiscardNull	Gets or sets a value indicating whether null bytes are ignored when transmitted between the port and the receive buffer.
DsrHoldingDsrHoldingDsrHoldingDsrHolding	Gets the state of the Data Set Ready (DSR) signal.
DtrEnableDtrEnableDtrEnableDtrEnable	Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication.
EncodingEncodingEncodingEncoding	Gets or sets the byte encoding for pre- and post-transmission conversion of text.
EventsEventsEventsEvents	Gets the list of event handlers that are attached to this Component. (Inherited from Component)
HandshakeHandshakeHandshakeHandshake	Gets or sets the handshaking protocol for serial port transmission of data using a value from Handshake.
IsOpenIsOpenIsOpenIsOpen	Gets a value indicating the open or closed status of the SerialPort object.
NewLineNewLineNewLineNewLine	Gets or sets the value used to interpret the end of a call to the ReadLine() and WriteLine(String) methods.
ParityParityParityParity	Gets or sets the parity-checking protocol.
ParityReplaceParityReplaceParityReplaceParityReplace	Gets or sets the byte that replaces invalid bytes in a data stream when a parity error occurs.
PortNamePortNamePortNamePortName	Gets or sets the port for communications, including but not limited to all available COM ports.
ReadBufferSizeReadBu

Detect Serial Port Settings