SerialPort Constructors

Definition

Namespace:

System.IO.Ports

Assembly:

System.IO.Ports.dll

Package:

System.IO.Ports v9.0.0

Initializes a new instance of the SerialPort class.

Overloads

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

SerialPort()

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class.

public:
 SerialPort();

public SerialPort ();

Public Sub New ()

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. This code example is part of a larger code example provided for the SerialPort class.

public:
    static void Main()
    {
        String^ name;
        String^ message;
        StringComparer^ stringComparer = StringComparer::OrdinalIgnoreCase;
        Thread^ readThread = gcnew Thread(gcnew ThreadStart(PortChat::Read));

        // Create a new SerialPort object with default settings.
        _serialPort = gcnew SerialPort();

        // Allow the user to set the appropriate properties.
        _serialPort->PortName = SetPortName(_serialPort->PortName);
        _serialPort->BaudRate = SetPortBaudRate(_serialPort->BaudRate);
        _serialPort->Parity = SetPortParity(_serialPort->Parity);
        _serialPort->DataBits = SetPortDataBits(_serialPort->DataBits);
        _serialPort->StopBits = SetPortStopBits(_serialPort->StopBits);
        _serialPort->Handshake = SetPortHandshake(_serialPort->Handshake);

        // Set the read/write timeouts
        _serialPort->ReadTimeout = 500;
        _serialPort->WriteTimeout = 500;

        _serialPort->Open();
        _continue = true;
        readThread->Start();

        Console::Write("Name: ");
        name = Console::ReadLine();

        Console::WriteLine("Type QUIT to exit");

        while (_continue)
        {
            message = Console::ReadLine();

            if (stringComparer->Equals("quit", message))
            {
                _continue = false;
            }
            else
            {
                _serialPort->WriteLine(
                    String::Format("<{0}>: {1}", name, message) );
            }
        }

        readThread->Join();
        _serialPort->Close();
    }

    static void Read()
    {
        while (_continue)
        {
            try
            {
                String^ message = _serialPort->ReadLine();
                Console::WriteLine(message);
            }
            catch (TimeoutException ^) { }
        }
    }

public static void Main()
{
    string name;
    string message;
    StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
    Thread readThread = new Thread(Read);

    // Create a new SerialPort object with default settings.
    _serialPort = new SerialPort();

    // Allow the user to set the appropriate properties.
    _serialPort.PortName = SetPortName(_serialPort.PortName);
    _serialPort.BaudRate = SetPortBaudRate(_serialPort.BaudRate);
    _serialPort.Parity = SetPortParity(_serialPort.Parity);
    _serialPort.DataBits = SetPortDataBits(_serialPort.DataBits);
    _serialPort.StopBits = SetPortStopBits(_serialPort.StopBits);
    _serialPort.Handshake = SetPortHandshake(_serialPort.Handshake);

    // Set the read/write timeouts
    _serialPort.ReadTimeout = 500;
    _serialPort.WriteTimeout = 500;

    _serialPort.Open();
    _continue = true;
    readThread.Start();

    Console.Write("Name: ");
    name = Console.ReadLine();

    Console.WriteLine("Type QUIT to exit");

    while (_continue)
    {
        message = Console.ReadLine();

        if (stringComparer.Equals("quit", message))
        {
            _continue = false;
        }
        else
        {
            _serialPort.WriteLine(
                String.Format("<{0}>: {1}", name, message));
        }
    }

    readThread.Join();
    _serialPort.Close();
}

public static void Read()
{
    while (_continue)
    {
        try
        {
            string message = _serialPort.ReadLine();
            Console.WriteLine(message);
        }
        catch (TimeoutException) { }
    }
}

Public Shared Sub Main()
    Dim name As String
    Dim message As String
    Dim stringComparer__1 As StringComparer = StringComparer.OrdinalIgnoreCase
    Dim readThread As New Thread(AddressOf Read)

    ' Create a new SerialPort object with default settings.
    _serialPort = New SerialPort()

    ' Allow the user to set the appropriate properties.
    _serialPort.PortName = SetPortName(_serialPort.PortName)
    _serialPort.BaudRate = SetPortBaudRate(_serialPort.BaudRate)
    _serialPort.Parity = SetPortParity(_serialPort.Parity)
    _serialPort.DataBits = SetPortDataBits(_serialPort.DataBits)
    _serialPort.StopBits = SetPortStopBits(_serialPort.StopBits)
    _serialPort.Handshake = SetPortHandshake(_serialPort.Handshake)

    ' Set the read/write timeouts
    _serialPort.ReadTimeout = 500
    _serialPort.WriteTimeout = 500

    _serialPort.Open()
    _continue = True
    readThread.Start()

    Console.Write("Name: ")
    name = Console.ReadLine()

    Console.WriteLine("Type QUIT to exit")

    While _continue
        message = Console.ReadLine()

        If stringComparer__1.Equals("quit", message) Then
            _continue = False
        Else
            _serialPort.WriteLine([String].Format("<{0}>: {1}", name, message))
        End If
    End While

    readThread.Join()
    _serialPort.Close()
End Sub

Public Shared Sub Read()
    While _continue
        Try
            Dim message As String = _serialPort.ReadLine()
            Console.WriteLine(message)
        Catch generatedExceptionName As TimeoutException
        End Try
    End While
End Sub

Remarks

This constructor uses default property values when none are specified. For example, the DataBits property defaults to 8, the Parity property defaults to the None enumeration value, the StopBits property defaults to 1, and a default port name of COM1.

SerialPort(IContainer)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified IContainer object.

public:
 SerialPort(System::ComponentModel::IContainer ^ container);

public SerialPort (System.ComponentModel.IContainer container);

new System.IO.Ports.SerialPort : System.ComponentModel.IContainer -> System.IO.Ports.SerialPort

Public Sub New (container As IContainer)

Parameters

container

IContainer

An interface to a container.

Exceptions

IOException

The specified port could not be found or opened.

Remarks

This constructor uses default property values when none are specified. For example, the DataBits property defaults to 8, the Parity property defaults to the None enumeration value, the StopBits property defaults to 1, and a default port name of COM1.

SerialPort(String)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified port name.

public:
 SerialPort(System::String ^ portName);

public SerialPort (string portName);

new System.IO.Ports.SerialPort : string -> System.IO.Ports.SerialPort

Public Sub New (portName As String)

Parameters

portName

String

The port to use (for example, COM1).

Exceptions

IOException

The specified port could not be found or opened.

Remarks

Use this constructor to create a new instance of the SerialPort class when you want to specify the port name.

SerialPort(String, Int32)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified port name and baud rate.

public:
 SerialPort(System::String ^ portName, int baudRate);

public SerialPort (string portName, int baudRate);

new System.IO.Ports.SerialPort : string * int -> System.IO.Ports.SerialPort

Public Sub New (portName As String, baudRate As Integer)

Parameters

portName

String

The port to use (for example, COM1).

baudRate

Int32

The baud rate.

Exceptions

IOException

The specified port could not be found or opened.

Remarks

Use this constructor to create a new instance of the SerialPort class when you want to specify the port name and the baud rate.

SerialPort(String, Int32, Parity)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified port name, baud rate, and parity bit.

public:
 SerialPort(System::String ^ portName, int baudRate, System::IO::Ports::Parity parity);

public SerialPort (string portName, int baudRate, System.IO.Ports.Parity parity);

new System.IO.Ports.SerialPort : string * int * System.IO.Ports.Parity -> System.IO.Ports.SerialPort

Public Sub New (portName As String, baudRate As Integer, parity As Parity)

Parameters

portName

String

The port to use (for example, COM1).

baudRate

Int32

The baud rate.

parity

Parity

One of the Parity values.

Exceptions

IOException

The specified port could not be found or opened.

Remarks

Use this constructor to create a new instance of the SerialPort class when you want to specify the port name, the baud rate, and the parity bit.

SerialPort(String, Int32, Parity, Int32)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, and data bits.

public:
 SerialPort(System::String ^ portName, int baudRate, System::IO::Ports::Parity parity, int dataBits);

public SerialPort (string portName, int baudRate, System.IO.Ports.Parity parity, int dataBits);

new System.IO.Ports.SerialPort : string * int * System.IO.Ports.Parity * int -> System.IO.Ports.SerialPort

Public Sub New (portName As String, baudRate As Integer, parity As Parity, dataBits As Integer)

Parameters

portName

String

The port to use (for example, COM1).

baudRate

Int32

The baud rate.

parity

Parity

One of the Parity values.

dataBits

Int32

The data bits value.

Exceptions

IOException

The specified port could not be found or opened.

Remarks

Use this constructor to create a new instance of the SerialPort class when you want to specify the port name, the baud rate, the parity bit, and data bits.

SerialPort(String, Int32, Parity, Int32, StopBits)

Source:

SerialPort.cs

Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, data bits, and stop bit.

public:
 SerialPort(System::String ^ portName, int baudRate, System::IO::Ports::Parity parity, int dataBits, System::IO::Ports::StopBits stopBits);

public SerialPort (string portName, int baudRate, System.IO.Ports.Parity parity, int dataBits, System.IO.Ports.StopBits stopBits);

new System.IO.Ports.SerialPort : string * int * System.IO.Ports.Parity * int * System.IO.Ports.StopBits -> System.IO.Ports.SerialPort

Public Sub New (portName As String, baudRate As Integer, parity As Parity, dataBits As Integer, stopBits As StopBits)

Parameters

portName

String

The port to use (for example, COM1).

baudRate

Int32

The baud rate.

parity

Parity

One of the Parity values.

dataBits

Int32

The data bits value.

stopBits

StopBits

One of the StopBits values.

Exceptions

IOException

The specified port could not be found or opened.

Remarks

Use this constructor to create a new instance of the SerialPort class when you want to specify the port name, the baud rate, the parity bit, data bits, and stop bit.