Socket Construtores

Definição

Inicializa uma nova instância da classe Socket.Initializes a new instance of the Socket class.

Sobrecargas

Socket(SafeSocketHandle)

Inicializa uma nova instância da classe Socket para o identificador de soquete especificado.Initializes a new instance of the Socket class for the specified socket handle.

Socket(SocketInformation)

Inicializa uma nova instância da classe Socket, usando o valor especificado de DuplicateAndClose(Int32).Initializes a new instance of the Socket class using the specified value returned from DuplicateAndClose(Int32).

Socket(SocketType, ProtocolType)

Inicializa uma nova instância da classe Socket usando o tipo de soquete e o protocolo especificados.Initializes a new instance of the Socket class using the specified socket type and protocol.

Socket(AddressFamily, SocketType, ProtocolType)

Inicializa uma nova instância da classe Socket usando a família de endereços, o tipo de soquete e o protocolo especificados.Initializes a new instance of the Socket class using the specified address family, socket type and protocol.

Socket(SafeSocketHandle)

Inicializa uma nova instância da classe Socket para o identificador de soquete especificado.Initializes a new instance of the Socket class for the specified socket handle.

public:
 Socket(System::Net::Sockets::SafeSocketHandle ^ handle);
public Socket (System.Net.Sockets.SafeSocketHandle handle);
new System.Net.Sockets.Socket : System.Net.Sockets.SafeSocketHandle -> System.Net.Sockets.Socket
Public Sub New (handle As SafeSocketHandle)

Parâmetros

handle
SafeSocketHandle

O identificador do soquete que o objeto Socket encapsulará.The socket handle for the socket that the Socket object will encapsulate.

Exceções

handle é null.handle is null.

handle é inválido.handle is invalid.

handle não é um soquete ou não foi possível acessar as informações sobre o soquete.handle is not a socket or information about the socket could not be accessed.

Comentários

Esse método popula a Socket instância com os dados coletados do fornecido SafeSocketHandle .This method populates the Socket instance with data gathered from the supplied SafeSocketHandle. Diferentes sistemas operacionais fornecem níveis variados de suporte para consultar um identificador de soquete ou um descritor de arquivo para suas propriedades e configurações.Different operating systems provide varying levels of support for querying a socket handle or file descriptor for its properties and configuration. Algumas das APIs públicas na Socket instância resultante podem ser diferentes com base no sistema operacional, como ProtocolType e Blocking .Some of the public APIs on the resulting Socket instance may differ based on operating system, such as ProtocolType and Blocking.

Aplica-se a

Socket(SocketInformation)

Inicializa uma nova instância da classe Socket, usando o valor especificado de DuplicateAndClose(Int32).Initializes a new instance of the Socket class using the specified value returned from DuplicateAndClose(Int32).

public:
 Socket(System::Net::Sockets::SocketInformation socketInformation);
[System.Runtime.Versioning.SupportedOSPlatform("windows")]
public Socket (System.Net.Sockets.SocketInformation socketInformation);
public Socket (System.Net.Sockets.SocketInformation socketInformation);
[<System.Runtime.Versioning.SupportedOSPlatform("windows")>]
new System.Net.Sockets.Socket : System.Net.Sockets.SocketInformation -> System.Net.Sockets.Socket
new System.Net.Sockets.Socket : System.Net.Sockets.SocketInformation -> System.Net.Sockets.Socket
Public Sub New (socketInformation As SocketInformation)

Parâmetros

socketInformation
SocketInformation

As informações de soquete retornadas por DuplicateAndClose(Int32).The socket information returned by DuplicateAndClose(Int32).

Atributos

Comentários

Se você chamar o Socket Construtor várias vezes com a mesma matriz de bytes que o argumento para cada chamada, criará vários s gerenciados Socket com o mesmo soquete subjacente.If you call the Socket constructor multiple times with the same byte array as the argument for each call, you will create multiple managed Sockets with the same underlying socket. Essa prática é altamente desencorajada.This practice is strongly discouraged.

Aplica-se a

Socket(SocketType, ProtocolType)

Inicializa uma nova instância da classe Socket usando o tipo de soquete e o protocolo especificados.Initializes a new instance of the Socket class using the specified socket type and protocol.

public:
 Socket(System::Net::Sockets::SocketType socketType, System::Net::Sockets::ProtocolType protocolType);
public Socket (System.Net.Sockets.SocketType socketType, System.Net.Sockets.ProtocolType protocolType);
new System.Net.Sockets.Socket : System.Net.Sockets.SocketType * System.Net.Sockets.ProtocolType -> System.Net.Sockets.Socket
Public Sub New (socketType As SocketType, protocolType As ProtocolType)

Parâmetros

socketType
SocketType

Um dos valores de SocketType.One of the SocketType values.

protocolType
ProtocolType

Um dos valores de ProtocolType.One of the ProtocolType values.

Exceções

A combinação de socketType e protocolType resulta em um soquete inválido.The combination of socketType and protocolType results in an invalid socket.

Comentários

O socketType parâmetro especifica o tipo da Socket classe e o protocolType parâmetro especifica o protocolo usado pelo Socket .The socketType parameter specifies the type of the Socket class and the protocolType parameter specifies the protocol used by Socket. Os dois parâmetros não são independentes.The two parameters are not independent. Geralmente, o Socket tipo é implícito no protocolo.Often the Socket type is implicit in the protocol. Se a combinação do Socket tipo e do tipo de protocolo resultar em um inválido Socket , esse construtor lançará um SocketException .If the combination of Socket type and protocol type results in an invalid Socket, this constructor throws a SocketException.

Observação

Se esse construtor lançar um SocketException , use a SocketException.ErrorCode propriedade para obter o código de erro específico.If this constructor throws a SocketException, use the SocketException.ErrorCode property to obtain the specific error code. Depois de obter esse código, consulte a documentação do código de erro da API do Windows Sockets versão 2 para obter uma descrição detalhada do erro.After you have obtained this code, refer to the Windows Sockets version 2 API error code documentation for a detailed description of the error.

Observação

Esse membro emite o rastreamento de informações quando você ativa o rastreamento de rede em seu aplicativo.This member outputs trace information when you enable network tracing in your application. Para obter mais informações, consulte rastreamento de rede na .NET Framework.For more information, see Network Tracing in the .NET Framework.

Aplica-se a

Socket(AddressFamily, SocketType, ProtocolType)

Inicializa uma nova instância da classe Socket usando a família de endereços, o tipo de soquete e o protocolo especificados.Initializes a new instance of the Socket class using the specified address family, socket type and protocol.

public:
 Socket(System::Net::Sockets::AddressFamily addressFamily, System::Net::Sockets::SocketType socketType, System::Net::Sockets::ProtocolType protocolType);
public Socket (System.Net.Sockets.AddressFamily addressFamily, System.Net.Sockets.SocketType socketType, System.Net.Sockets.ProtocolType protocolType);
new System.Net.Sockets.Socket : System.Net.Sockets.AddressFamily * System.Net.Sockets.SocketType * System.Net.Sockets.ProtocolType -> System.Net.Sockets.Socket
Public Sub New (addressFamily As AddressFamily, socketType As SocketType, protocolType As ProtocolType)

Parâmetros

addressFamily
AddressFamily

Um dos valores de AddressFamily.One of the AddressFamily values.

socketType
SocketType

Um dos valores de SocketType.One of the SocketType values.

protocolType
ProtocolType

Um dos valores de ProtocolType.One of the ProtocolType values.

Exceções

A combinação de addressFamily, socketType e protocolType resulta em um soquete inválido.The combination of addressFamily, socketType, and protocolType results in an invalid socket.

Exemplos

O exemplo de código a seguir demonstra como criar uma instância da Socket classe.The following code example demonstrates how to create an instance of the Socket class.

#using <System.dll>

using namespace System;
using namespace System::Text;
using namespace System::IO;
using namespace System::Net;
using namespace System::Net::Sockets;
String^ DoSocketGet( String^ server )
{
   
   //Set up variables and String to write to the server.
   Encoding^ ASCII = Encoding::ASCII;
   String^ Get =  "GET / HTTP/1.1\r\nHost: ";
   Get->Concat( server,  "\r\nConnection: Close\r\n\r\n" );
   array<Byte>^ByteGet = ASCII->GetBytes( Get );
   array<Byte>^RecvBytes = gcnew array<Byte>(256);
   String^ strRetPage = nullptr;
   
   // IPAddress and IPEndPoint represent the endpoint that will
   //   receive the request.
   // Get first IPAddress in list return by DNS.
   try
   {
      
      // Define those variables to be evaluated in the next for loop and 
      // then used to connect to the server. These variables are defined
      // outside the for loop to make them accessible there after.
      Socket^ s = nullptr;
      IPEndPoint^ hostEndPoint;
      IPAddress^ hostAddress = nullptr;
      int conPort = 80;
      
      // Get DNS host information.
      IPHostEntry^ hostInfo = Dns::Resolve( server );
      
      // Get the DNS IP addresses associated with the host.
      array<IPAddress^>^IPaddresses = hostInfo->AddressList;
      
      // Evaluate the socket and receiving host IPAddress and IPEndPoint. 
      for ( int index = 0; index < IPaddresses->Length; index++ )
      {
         hostAddress = IPaddresses[ index ];
         hostEndPoint = gcnew IPEndPoint( hostAddress,conPort );
         
         // Creates the Socket to send data over a TCP connection.
         s = gcnew Socket( AddressFamily::InterNetwork,SocketType::Stream,ProtocolType::Tcp );
         
         // Connect to the host using its IPEndPoint.
         s->Connect( hostEndPoint );
         if (  !s->Connected )
         {
            
            // Connection failed, try next IPaddress.
            strRetPage =  "Unable to connect to host";
            s = nullptr;
            continue;
         }

         
         // Sent the GET request to the host.
         s->Send( ByteGet, ByteGet->Length, SocketFlags::None );
         

      }
      
      // Receive the host home page content and loop until all the data is received.
      Int32 bytes = s->Receive( RecvBytes, RecvBytes->Length, SocketFlags::None );
      strRetPage =  "Default HTML page on ";
      strRetPage->Concat( server,  ":\r\n", ASCII->GetString( RecvBytes, 0, bytes ) );
      while ( bytes > 0 )
      {
         bytes = s->Receive( RecvBytes, RecvBytes->Length, SocketFlags::None );
         strRetPage->Concat( ASCII->GetString( RecvBytes, 0, bytes ) );
      }

      
   }
   catch ( SocketException^ e ) 
   {
      Console::WriteLine(  "SocketException caught!!!" );
      Console::Write(  "Source : " );
      Console::WriteLine( e->Source );
      Console::Write(  "Message : " );
      Console::WriteLine( e->Message );
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine(  "ArgumentNULLException caught!!!" );
      Console::Write(  "Source : " );
      Console::WriteLine( e->Source );
      Console::Write(  "Message : " );
      Console::WriteLine( e->Message );
   }
   catch ( NullReferenceException^ e ) 
   {
      Console::WriteLine(  "NULLReferenceException caught!!!" );
      Console::Write(  "Source : " );
      Console::WriteLine( e->Source );
      Console::Write(  "Message : " );
      Console::WriteLine( e->Message );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine(  "Exception caught!!!" );
      Console::Write(  "Source : " );
      Console::WriteLine( e->Source );
      Console::Write(  "Message : " );
      Console::WriteLine( e->Message );
   }

   return strRetPage;
}

int main()
{
   Console::WriteLine( DoSocketGet(  "localhost" ) );
}

using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;

public class Sample
{

  public static string DoSocketGet(string server)
  {
    //Set up variables and String to write to the server.
    Encoding ASCII = Encoding.ASCII;
    string Get = "GET / HTTP/1.1\r\nHost: " + server +
                 "\r\nConnection: Close\r\n\r\n";
    Byte[] ByteGet = ASCII.GetBytes(Get);
    Byte[] RecvBytes = new Byte[256];
    String strRetPage = null;

    // IPAddress and IPEndPoint represent the endpoint that will
    //   receive the request.
    // Get first IPAddress in list return by DNS.

    try
    {

      // Define those variables to be evaluated in the next for loop and
      // then used to connect to the server. These variables are defined
      // outside the for loop to make them accessible there after.
      Socket s = null;
      IPEndPoint hostEndPoint;
      IPAddress hostAddress = null;
      int conPort = 80;

      // Get DNS host information.
      IPHostEntry hostInfo = Dns.GetHostEntry(server);
      // Get the DNS IP addresses associated with the host.
      IPAddress[] IPaddresses = hostInfo.AddressList;

      // Evaluate the socket and receiving host IPAddress and IPEndPoint.
      for (int index=0; index<IPaddresses.Length; index++)
      {
        hostAddress = IPaddresses[index];
        hostEndPoint = new IPEndPoint(hostAddress, conPort);


        // Creates the Socket to send data over a TCP connection.
        s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );


        // Connect to the host using its IPEndPoint.
        s.Connect(hostEndPoint);

        if (!s.Connected)
        {
          // Connection failed, try next IPaddress.
          strRetPage = "Unable to connect to host";
          s = null;
          continue;
        }

        // Sent the GET request to the host.
        s.Send(ByteGet, ByteGet.Length, 0);

      } // End of the for loop.


      // Receive the host home page content and loop until all the data is received.
      Int32 bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
      strRetPage = "Default HTML page on " + server + ":\r\n";
      strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);

      while (bytes > 0)
      {
        bytes = s.Receive(RecvBytes, RecvBytes.Length, 0);
        strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes);
      }

    } // End of the try block.

    catch(SocketException e)
    {
      Console.WriteLine("SocketException caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }
    catch(ArgumentNullException e)
    {
      Console.WriteLine("ArgumentNullException caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }
    catch(NullReferenceException e)
    {
      Console.WriteLine("NullReferenceException caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }
    catch(Exception e)
    {
      Console.WriteLine("Exception caught!!!");
      Console.WriteLine("Source : " + e.Source);
      Console.WriteLine("Message : " + e.Message);
    }

    return strRetPage;
}
   public static void Main()
   {
      Console.WriteLine(DoSocketGet("localhost"));
   }
 }
Imports System.Text
Imports System.IO
Imports System.Net
Imports System.Net.Sockets

 _

Public Class Sample
   
   
   Public Shared Function DoSocketGet(server As String) As String
      'Set up variables and String to write to the server.
    Dim ASCII As Encoding = Encoding.ASCII
    Dim [Get] As String = "GET / HTTP/1.1" + ControlChars.Lf + ControlChars.NewLine + "Host: " + server + ControlChars.Lf + ControlChars.NewLine + "Connection: Close" + ControlChars.Lf + ControlChars.NewLine + ControlChars.Lf + ControlChars.NewLine
    Dim ByteGet As [Byte]() = ASCII.GetBytes([Get])
    Dim RecvBytes(256) As [Byte]
    Dim strRetPage As [String] = Nothing


      
      ' IPAddress and IPEndPoint represent the endpoint that will
      '   receive the request.
      ' Get first IPAddress in list return by DNS.
      Try

 

         ' Define those variables to be evaluated in the next for loop and 
         ' then used to connect to the server. These variables are defined
         ' outside the for loop to make them accessible there after.
         Dim s As Socket = Nothing
         Dim hostEndPoint As IPEndPoint
         Dim hostAddress As IPAddress = Nothing
         Dim conPort As Integer = 80
         
         ' Get DNS host information.
         Dim hostInfo As IPHostEntry = Dns.Resolve(server)
         ' Get the DNS IP addresses associated with the host.
         Dim IPaddresses As IPAddress() = hostInfo.AddressList
         
         ' Evaluate the socket and receiving host IPAddress and IPEndPoint. 
      Dim index As Integer = 0
      For index = 0 To IPaddresses.Length - 1
        hostAddress = IPaddresses(index)
        hostEndPoint = New IPEndPoint(hostAddress, conPort)


        ' Creates the Socket to send data over a TCP connection.
        s = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)


        ' Connect to the host using its IPEndPoint.
        s.Connect(hostEndPoint)

        If Not s.Connected Then
          ' Connection failed, try next IPaddress.
          strRetPage = "Unable to connect to host"
          s = Nothing
          GoTo ContinueFor1
        End If


        ' Sent the GET request to the host.
        s.Send(ByteGet, ByteGet.Length, 0)


ContinueFor1:
      Next index  ' End of the for loop.
      



      ' Receive the host home page content and loop until all the data is received.

      'Dim bytes As Int32 = s.Receive(RecvBytes, RecvBytes.Length, 0)
      Dim bytes As Int32 = s.Receive(RecvBytes, RecvBytes.Length, 0)

      strRetPage = "Default HTML page on " + server + ":\r\n"
      strRetPage = "Default HTML page on " + server + ":" + ControlChars.Lf + ControlChars.NewLine

      Dim i As Integer

      While bytes > 0

        bytes = s.Receive(RecvBytes, RecvBytes.Length, 0)

        strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, bytes)

      End While


      ' End of the try block.
    Catch e As SocketException
         Console.WriteLine("SocketException caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      Catch e As ArgumentNullException
         Console.WriteLine("ArgumentNullException caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      Catch e As NullReferenceException
         Console.WriteLine("NullReferenceException caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      Catch e As Exception
         Console.WriteLine("Exception caught!!!")
         Console.WriteLine(("Source : " + e.Source))
         Console.WriteLine(("Message : " + e.Message))
      End Try
      
      Return strRetPage
   End Function 'DoSocketGet
    
   Public Shared Sub Main()
    Console.WriteLine(DoSocketGet("localhost"))
   End Sub
End Class

Comentários

O addressFamily parâmetro especifica o esquema de endereçamento que a Socket classe usa, o socketType parâmetro especifica o tipo da Socket classe e o protocolType parâmetro especifica o protocolo usado pelo Socket .The addressFamily parameter specifies the addressing scheme that the Socket class uses, the socketType parameter specifies the type of the Socket class, and the protocolType parameter specifies the protocol used by Socket. Os três parâmetros não são independentes.The three parameters are not independent. Algumas famílias de endereços restringem quais protocolos podem ser usados com eles e, muitas vezes, o Socket tipo é implícito no protocolo.Some address families restrict which protocols can be used with them, and often the Socket type is implicit in the protocol. Se a combinação de família de endereços, Socket tipo e tipo de protocolo resultar em um inválido Socket , esse construtor lançará um SocketException .If the combination of address family, Socket type, and protocol type results in an invalid Socket, this constructor throws a SocketException.

Observação

Se esse construtor lançar um SocketException , use a SocketException.ErrorCode propriedade para obter o código de erro específico.If this constructor throws a SocketException, use the SocketException.ErrorCode property to obtain the specific error code. Depois de obter esse código, consulte a documentação do código de erro da API do Windows Sockets versão 2 para obter uma descrição detalhada do erro.After you have obtained this code, refer to the Windows Sockets version 2 API error code documentation for a detailed description of the error.

Observação

Esse membro emite o rastreamento de informações quando você ativa o rastreamento de rede em seu aplicativo.This member outputs trace information when you enable network tracing in your application. Para obter mais informações, consulte rastreamento de rede na .NET Framework.For more information, see Network Tracing in the .NET Framework.

Confira também

Aplica-se a