SerialPort Klasa

Definicja

public ref class SerialPort : System::ComponentModel::Component

public class SerialPort : System.ComponentModel.Component

type SerialPort = class
    inherit Component

Public Class SerialPort
Inherits Component

Dziedziczenie

Object

MarshalByRefObject

Component

SerialPort

Przykłady

Poniższy przykład kodu demonstruje użycie klasy SerialPort, aby umożliwić dwóm użytkownikom Czat z dwóch oddzielnych komputerów podłączonych za pośrednictwem kabla pseudomodemu.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. W tym przykładzie użytkownicy są monitowani, aby ustawić port i nazwę użytkownika przed rozpoczęciem rozmowy.In this example, the users are prompted for the port settings and a username before chatting. Oba komputery muszą wykonywać program, aby osiągnąć pełną funkcjonalność tego przykładu.Both computers must be executing the program to achieve full functionality of this example.

#using <System.dll>

using namespace System;
using namespace System::IO::Ports;
using namespace System::Threading;

public ref class PortChat
{
private:
    static bool _continue;
    static SerialPort^ _serialPort;

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 ^) { }
        }
    }

    static String^ SetPortName(String^ defaultPortName)
    {
        String^ portName;

        Console::WriteLine("Available Ports:");
        for each (String^ s in SerialPort::GetPortNames())
        {
            Console::WriteLine("   {0}", s);
        }

        Console::Write("Enter COM port value (Default: {0}): ", defaultPortName);
        portName = Console::ReadLine();

        if (portName == "")
        {
            portName = defaultPortName;
        }
        return portName;
    }

    static Int32 SetPortBaudRate(Int32 defaultPortBaudRate)
    {
        String^ baudRate;

        Console::Write("Baud Rate(default:{0}): ", defaultPortBaudRate);
        baudRate = Console::ReadLine();

        if (baudRate == "")
        {
            baudRate = defaultPortBaudRate.ToString();
        }

        return Int32::Parse(baudRate);
    }

    static Parity SetPortParity(Parity defaultPortParity)
    {
        String^ parity;

        Console::WriteLine("Available Parity options:");
        for each (String^ s in Enum::GetNames(Parity::typeid))
        {
            Console::WriteLine("   {0}", s);
        }
        
        Console::Write("Enter Parity value (Default: {0}):", defaultPortParity.ToString());
        parity = Console::ReadLine();

        if (parity == "")
        {
            parity = defaultPortParity.ToString();
        }

        return (Parity)Enum::Parse(Parity::typeid, parity);
    }

    static Int32 SetPortDataBits(Int32 defaultPortDataBits)
    {
        String^ dataBits;

        Console::Write("Enter DataBits value (Default: {0}): ", defaultPortDataBits);
        dataBits = Console::ReadLine();

        if (dataBits == "")
        {
            dataBits = defaultPortDataBits.ToString();
        }

        return Int32::Parse(dataBits);
    }

    static StopBits SetPortStopBits(StopBits defaultPortStopBits)
    {
        String^ stopBits;

        Console::WriteLine("Available Stop Bits options:");
        for each (String^ s in Enum::GetNames(StopBits::typeid))
        {
            Console::WriteLine("   {0}", s);
        }

        Console::Write("Enter StopBits value (None is not supported and \n" +
            "raises an ArgumentOutOfRangeException. \n (Default: {0}):", defaultPortStopBits.ToString());
        stopBits = Console::ReadLine();

        if (stopBits == "")
        {
            stopBits = defaultPortStopBits.ToString();
        }

        return (StopBits)Enum::Parse(StopBits::typeid, stopBits);
    }

    static Handshake SetPortHandshake(Handshake defaultPortHandshake)
    {
        String^ handshake;

        Console::WriteLine("Available Handshake options:");
        for each (String^ s in Enum::GetNames(Handshake::typeid))
        {
            Console::WriteLine("   {0}", s);
        }

        Console::Write("Enter Handshake value (Default: {0}):", defaultPortHandshake.ToString());
        handshake = Console::ReadLine();

        if (handshake == "")
        {
            handshake = defaultPortHandshake.ToString();
        }

        return (Handshake)Enum::Parse(Handshake::typeid, handshake);
    }
};

int main()
{
    PortChat::Main();
}

// Use this code inside a project created with the Visual C# > Windows Desktop > Console Application template.
// Replace the code in Program.cs with this code.

using System;
using System.IO.Ports;
using System.Threading;

public class PortChat
{
    static bool _continue;
    static SerialPort _serialPort;

    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) { }
        }
    }

    // Display Port values and prompt user to enter a port.
    public static string SetPortName(string defaultPortName)
    {
        string portName;

        Console.WriteLine("Available Ports:");
        foreach (string s in SerialPort.GetPortNames())
        {
            Console.WriteLine("   {0}", s);
        }

        Console.Write("Enter COM port value (Default: {0}): ", defaultPortName);
        portName = Console.ReadLine();

        if (portName == "" || !(portName.ToLower()).StartsWith("com"))
        {
            portName = defaultPortName;
        }
        return portName;
    }
    // Display BaudRate values and prompt user to enter a value.
    public static int SetPortBaudRate(int defaultPortBaudRate)
    {
        string baudRate;

        Console.Write("Baud Rate(default:{0}): ", defaultPortBaudRate);
        baudRate = Console.ReadLine();

        if (baudRate == "")
        {
            baudRate = defaultPortBaudRate.ToString();
        }

        return int.Parse(baudRate);
    }

    // Display PortParity values and prompt user to enter a value.
    public static Parity SetPortParity(Parity defaultPortParity)
    {
        string parity;

        Console.WriteLine("Available Parity options:");
        foreach (string s in Enum.GetNames(typeof(Parity)))
        {
            Console.WriteLine("   {0}", s);
        }

        Console.Write("Enter Parity value (Default: {0}):", defaultPortParity.ToString(), true);
        parity = Console.ReadLine();

        if (parity == "")
        {
            parity = defaultPortParity.ToString();
        }

        return (Parity)Enum.Parse(typeof(Parity), parity, true);
    }
    // Display DataBits values and prompt user to enter a value.
    public static int SetPortDataBits(int defaultPortDataBits)
    {
        string dataBits;

        Console.Write("Enter DataBits value (Default: {0}): ", defaultPortDataBits);
        dataBits = Console.ReadLine();

        if (dataBits == "")
        {
            dataBits = defaultPortDataBits.ToString();
        }

        return int.Parse(dataBits.ToUpperInvariant());
    }

    // Display StopBits values and prompt user to enter a value.
    public static StopBits SetPortStopBits(StopBits defaultPortStopBits)
    {
        string stopBits;

        Console.WriteLine("Available StopBits options:");
        foreach (string s in Enum.GetNames(typeof(StopBits)))
        {
            Console.WriteLine("   {0}", s);
        }

        Console.Write("Enter StopBits value (None is not supported and \n" +
         "raises an ArgumentOutOfRangeException. \n (Default: {0}):", defaultPortStopBits.ToString());
        stopBits = Console.ReadLine();
       
        if (stopBits == "" )
        {
            stopBits = defaultPortStopBits.ToString();
        }

        return (StopBits)Enum.Parse(typeof(StopBits), stopBits, true);
    }
    public static Handshake SetPortHandshake(Handshake defaultPortHandshake)
    {
        string handshake;

        Console.WriteLine("Available Handshake options:");
        foreach (string s in Enum.GetNames(typeof(Handshake)))
        {
            Console.WriteLine("   {0}", s);
        }

        Console.Write("Enter Handshake value (Default: {0}):", defaultPortHandshake.ToString());
        handshake = Console.ReadLine();

        if (handshake == "")
        {
            handshake = defaultPortHandshake.ToString();
        }

        return (Handshake)Enum.Parse(typeof(Handshake), handshake, true);
    }
}

' Use this code inside a project created with the Visual Basic > Windows Desktop > Console Application template.
' Replace the default code in Module1.vb with this code. Then right click the project in Solution Explorer,
' select Properties, and set the Startup Object to PortChat.

Imports System.IO.Ports
Imports System.Threading

Public Class PortChat
    Shared _continue As Boolean
    Shared _serialPort As SerialPort

    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

    ' Display Port values and prompt user to enter a port.
    Public Shared Function SetPortName(defaultPortName As String) As String
        Dim portName As String

        Console.WriteLine("Available Ports:")
        For Each s As String In SerialPort.GetPortNames()
            Console.WriteLine("   {0}", s)
        Next

        Console.Write("Enter COM port value (Default: {0}): ", defaultPortName)
        portName = Console.ReadLine()

        If portName = "" OrElse Not (portName.ToLower()).StartsWith("com") Then
            portName = defaultPortName
        End If
        Return portName
    End Function
    ' Display BaudRate values and prompt user to enter a value.
    Public Shared Function SetPortBaudRate(defaultPortBaudRate As Integer) As Integer
        Dim baudRate As String

        Console.Write("Baud Rate(default:{0}): ", defaultPortBaudRate)
        baudRate = Console.ReadLine()

        If baudRate = "" Then
            baudRate = defaultPortBaudRate.ToString()
        End If

        Return Integer.Parse(baudRate)
    End Function

    ' Display PortParity values and prompt user to enter a value.
    Public Shared Function SetPortParity(defaultPortParity As Parity) As Parity
        Dim parity As String

        Console.WriteLine("Available Parity options:")
        For Each s As String In [Enum].GetNames(GetType(Parity))
            Console.WriteLine("   {0}", s)
        Next

        Console.Write("Enter Parity value (Default: {0}):", defaultPortParity.ToString(), True)
        parity = Console.ReadLine()

        If parity = "" Then
            parity = defaultPortParity.ToString()
        End If

        Return CType([Enum].Parse(GetType(Parity), parity, True), Parity)
    End Function
    ' Display DataBits values and prompt user to enter a value.
    Public Shared Function SetPortDataBits(defaultPortDataBits As Integer) As Integer
        Dim dataBits As String

        Console.Write("Enter DataBits value (Default: {0}): ", defaultPortDataBits)
        dataBits = Console.ReadLine()

        If dataBits = "" Then
            dataBits = defaultPortDataBits.ToString()
        End If

        Return Integer.Parse(dataBits.ToUpperInvariant())
    End Function
    ' Display StopBits values and prompt user to enter a value.

    Public Shared Function SetPortStopBits(defaultPortStopBits As StopBits) As StopBits
        Dim stopBits As String

        Console.WriteLine("Available StopBits options:")
        For Each s As String In [Enum].GetNames(GetType(StopBits))
            Console.WriteLine("   {0}", s)
        Next

        Console.Write("Enter StopBits value (None is not supported and " &
                      vbLf & "raises an ArgumentOutOfRangeException. " &
                      vbLf & " (Default: {0}):", defaultPortStopBits.ToString())
        stopBits = Console.ReadLine()

        If stopBits = "" Then
            stopBits = defaultPortStopBits.ToString()
        End If

        Return CType([Enum].Parse(GetType(StopBits), stopBits, True), StopBits)
    End Function
    Public Shared Function SetPortHandshake(defaultPortHandshake As Handshake) As Handshake
        Dim handshake As String

        Console.WriteLine("Available Handshake options:")
        For Each s As String In [Enum].GetNames(GetType(Handshake))
            Console.WriteLine("   {0}", s)
        Next

        Console.Write("Enter Handshake value (Default: {0}):", defaultPortHandshake.ToString())
        handshake = Console.ReadLine()

        If handshake = "" Then
            handshake = defaultPortHandshake.ToString()
        End If

        Return CType([Enum].Parse(GetType(Handshake), handshake, True), Handshake)
    End Function
End Class

Uwagi

Ta klasa służy do sterowania zasobem pliku portu szeregowego.Use this class to control a serial port file resource. Ta klasa zapewnia synchroniczną i sterowaną zdarzeniami we/wy, dostęp do numerów PIN i stan przerwań oraz dostęp do właściwości sterownika szeregowego.This class provides synchronous and event-driven I/O, access to pin and break states, and access to serial driver properties. Ponadto funkcje tej klasy mogą być opakowane w wewnętrzny obiekt Stream, dostępne za pomocą właściwości BaseStream i przekazywać do klas, które zawijają lub używają strumieni.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.

Klasa SerialPort obsługuje następujące kodowania: ASCIIEncoding, UTF8Encoding, UnicodeEncoding, UTF32Encodingi wszelkie kodowanie zdefiniowane w bibliotece Mscorlib. dll, gdzie strona kodowa jest mniejsza niż 50000 lub strona kodowa to 54936.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. Można użyć alternatywnych kodowań, ale należy użyć metody ReadByte lub Write i samodzielnie wykonać kodowanie.You can use alternate encodings, but you must use the ReadByte or Write method and perform the encoding yourself.

Użyj metody GetPortNames, aby pobrać prawidłowe porty dla bieżącego komputera.You use the GetPortNames method to retrieve the valid ports for the current computer.

Jeśli obiekt SerialPort zostanie zablokowany podczas operacji odczytu, nie przerywaj wątku.If a SerialPort object becomes blocked during a read operation, do not abort the thread. Zamiast tego należy zamknąć strumień podstawowy lub usunąć obiekt SerialPort.Instead, either close the base stream or dispose of the SerialPort object.

Konstruktory

Pola

Właściwości

Metody

Zdarzenia

Zabezpieczenia

SecurityPermission
Aby uzyskać możliwość wywoływania niezarządzanego kodu.for the ability to call unmanaged code. Skojarzone Wyliczenie: UnmanagedCodeAssociated enumeration: UnmanagedCode

Dotyczy