TcpListener.EndAcceptTcpClient(IAsyncResult) 方法

定义

异步接受传入的连接尝试,并创建新的 TcpClient 来处理远程主机通信。Asynchronously accepts an incoming connection attempt and creates a new TcpClient to handle remote host communication.

public:
 System::Net::Sockets::TcpClient ^ EndAcceptTcpClient(IAsyncResult ^ asyncResult);
public System.Net.Sockets.TcpClient EndAcceptTcpClient (IAsyncResult asyncResult);
member this.EndAcceptTcpClient : IAsyncResult -> System.Net.Sockets.TcpClient
Public Function EndAcceptTcpClient (asyncResult As IAsyncResult) As TcpClient

参数

asyncResult
IAsyncResult

通过调用 IAsyncResult 方法返回 BeginAcceptTcpClient(AsyncCallback, Object)An IAsyncResult returned by a call to the BeginAcceptTcpClient(AsyncCallback, Object) method.

返回

TcpClient

TcpClientA TcpClient.

用于发送和接收数据的 TcpClientThe TcpClient used to send and receive data.

示例

下面的代码示例演示如何使用 BeginAcceptTcpClient 方法来创建和连接套接字。The following code example demonstrates the use of the BeginAcceptTcpClient method to create and connect a socket. 回调委托调用 EndAcceptTcpClient 方法以结束异步请求。The callback delegate calls the EndAcceptTcpClient method to end the asynchronous request.

    // Thread signal.
public:
    static ManualResetEvent^ TcpClientConnected;

    // Accept one client connection asynchronously.
public:
    static void DoBeginAcceptTcpClient(TcpListener^ listener)
    {
        // Set the event to nonsignaled state.
        TcpClientConnected->Reset();

        // Start to listen for connections from a client.
        Console::WriteLine("Waiting for a connection...");

        // Accept the connection.
        // BeginAcceptSocket() creates the accepted socket.
        listener->BeginAcceptTcpClient(
            gcnew AsyncCallback(DoAcceptTcpClientCallback),
            listener);

        // Wait until a connection is made and processed before
        // continuing.
        TcpClientConnected->WaitOne();
    }

    // Process the client connection.
public:
    static void DoAcceptTcpClientCallback(IAsyncResult^ result)
    {
        // Get the listener that handles the client request.
        TcpListener^ listener = (TcpListener^) result->AsyncState;

        // End the operation and display the received data on
        // the console.
        TcpClient^ client = listener->EndAcceptTcpClient(result);

        // Process the connection here. (Add the client to a
        // server table, read data, etc.)
        Console::WriteLine("Client connected completed");

        // Signal the calling thread to continue.
        TcpClientConnected->Set();

    }
// Thread signal.
public static ManualResetEvent tcpClientConnected =
    new ManualResetEvent(false);

// Accept one client connection asynchronously.
public static void DoBeginAcceptTcpClient(TcpListener
    listener)
{
    // Set the event to nonsignaled state.
    tcpClientConnected.Reset();

    // Start to listen for connections from a client.
    Console.WriteLine("Waiting for a connection...");

    // Accept the connection.
    // BeginAcceptSocket() creates the accepted socket.
    listener.BeginAcceptTcpClient(
        new AsyncCallback(DoAcceptTcpClientCallback),
        listener);

    // Wait until a connection is made and processed before
    // continuing.
    tcpClientConnected.WaitOne();
}

// Process the client connection.
public static void DoAcceptTcpClientCallback(IAsyncResult ar)
{
    // Get the listener that handles the client request.
    TcpListener listener = (TcpListener) ar.AsyncState;

    // End the operation and display the received data on
    // the console.
    TcpClient client = listener.EndAcceptTcpClient(ar);

    // Process the connection here. (Add the client to a
    // server table, read data, etc.)
    Console.WriteLine("Client connected completed");

    // Signal the calling thread to continue.
    tcpClientConnected.Set();
}
' Thread signal.
Public Shared tcpClientConnected As New ManualResetEvent(False)


' Accept one client connection asynchronously.
Public Shared Sub DoBeginAcceptTcpClient(listener As TcpListener)
   ' Set the event to nonsignaled state.
   tcpClientConnected.Reset()
   
   ' Start to listen for connections from a client.
   Console.WriteLine("Waiting for a connection...")
   
   ' Accept the connection. 
   ' BeginAcceptSocket() creates the accepted socket.
   listener.BeginAcceptTcpClient(New AsyncCallback(AddressOf DoAcceptTcpClientCallback), listener)
   
   ' Wait until a connection is made and processed before 
   ' continuing.
   tcpClientConnected.WaitOne()
End Sub


' Process the client connection.
Public Shared Sub DoAcceptTcpClientCallback(ar As IAsyncResult)
   ' Get the listener that handles the client request.
   Dim listener As TcpListener = CType(ar.AsyncState, TcpListener)
   
   ' End the operation and display the received data on 
   ' the console.
   Dim client As TcpClient = listener.EndAcceptTcpClient(ar)
   
   ' Process the connection here. (Add the client to a
   ' server table, read data, etc.)
   Console.WriteLine("Client connected completed")
   
   ' Signal the calling thread to continue.
   tcpClientConnected.Set()
End Sub
 

注解

此方法将在操作完成之前一直阻止。This method blocks until the operation is complete. 若要同步执行此操作,请使用 AcceptTcpClient 方法。To perform this operation synchronously, use the AcceptTcpClient method.

备注

可以调用 RemoteEndPoint 基础套接字的属性 (Client) 来识别远程主机的网络地址和端口号。You can call the RemoteEndPoint property of the underlying socket (Client) to identify the remote host's network address and port number.

备注

如果收到 SocketException ,请使用 SocketException.ErrorCode 属性获取特定的错误代码,并参考 Windows 套接字版本 2 API 错误代码 文档,以获取有关错误的详细说明。If you receive a SocketException, use the SocketException.ErrorCode property to obtain the specific error code and refer to the Windows Sockets version 2 API error code documentation for a detailed description of the error.

备注

当你在应用程序中启用网络跟踪后,此成员将输出跟踪信息。This member outputs trace information when you enable network tracing in your application. 有关详细信息,请参阅 .NET Framework 中的网络跟踪For more information, see Network Tracing in the .NET Framework.

适用于