1、TCP实现类

internal class TcpClient
    {
        Socket ClientSocket { get; set; }
        public byte[] ReceiveBuffer { get; set; }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="receiveBufferLength"></param>
        public TcpClient(int receiveBufferLength) 
        {
            ReceiveBuffer = new byte[receiveBufferLength];
        }
        /// <summary>
        /// 连接服务器
        /// </summary>
        /// <param name="ip"></param>
        /// <param name="port"></param>
        public void Start(string ip, string port)
        {
            ClientSocket = CreateSocket(ip, port);
            CreateThread();
        }
        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="buffer"></param>
        public void Send(byte[] buffer)
        {
            ClientSocket.Send(buffer);
        }
        /// <summary>
        /// 断开服务器
        /// </summary>
        public void Stop()
        {
            ClientSocket.Close();
        }
        /// <summary>
        /// 创建客户端Socket
        /// </summary>
        /// <param name="ip"></param>
        /// <param name="port"></param>
        /// <returns></returns>
        private Socket CreateSocket(string ip, string port)
        {
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPAddress address = IPAddress.Parse(ip);
            IPEndPoint endPoint = new IPEndPoint(address, int.Parse(port));
            socket.Connect(endPoint);
            return socket;
        }
        /// <summary>
        /// 创建服务端发来消息的线程并启动
        /// </summary>
        private void CreateThread()
        {
            Thread clientThread = new Thread(ReceiverThread);
            clientThread.IsBackground = true;
            clientThread.Start();
        }
        /// <summary>
        /// 接收服务端发来消息的处理方法
        /// </summary>
        private void ReceiverThread()
        {
            int bufferlength = 2 * 1024;
            while (true)
            {
                int length = 0;
                byte[] buffer = new byte[bufferlength];
                try
                {
                    length = ClientSocket.Receive(buffer);
                }catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                    break;
                }
                Buffer.BlockCopy(buffer, 0, ReceiveBuffer, 0, length);
            }
        }
    }

2、实现界面

<Grid Margin="10">
        <Grid.RowDefinitions>
            <RowDefinition Height="50"/>
            <RowDefinition Height="50"/>
            <RowDefinition Height="50"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="50"/>
            <RowDefinition Height="50"/>
        </Grid.RowDefinitions>
        <TextBlock Grid.Row="0" Text="配置" VerticalAlignment="Center"/>
        <DockPanel Grid.Row="1" HorizontalAlignment="Left">
            <TextBlock Text="地址" VerticalAlignment="Center" Margin="20 0 10 0"/>
            <TextBox x:Name="TextBoxIp" Text="" Width="100" Height="36" VerticalContentAlignment="Center"/>
            <TextBlock Text="端口" VerticalAlignment="Center" Margin="20 0 10 0"/>
            <TextBox x:Name="TextBoxport" Text="" Width="100" Height="36" VerticalContentAlignment="Center"/>
            <Button x:Name="ButtonStart" Content="连接" Width="75" Height="36" Margin="20,0,10,0" Click="ButtonStart_Click"/>
        </DockPanel>
        <TextBlock Grid.Row="2" Text="接收" VerticalAlignment="Center"/>
        <TextBox Grid.Row="3" Name="TextBoxReciver" Text=""/>
        <TextBlock Grid.Row="4" Text="发送" VerticalAlignment="Center"/>
        <StackPanel Grid.Row="5" Orientation="Horizontal">
            <TextBox x:Name="TextBoxSender" Text="" Width="650" Height="36"/>
            <Button Content="发送" Click="ButtonSend_CLick" Width="75" Height="36" HorizontalAlignment="Right" Margin="10 0 20 0"/>
        </StackPanel>
    </Grid>

3、后台代码

TcpClient tcpClient = null;
        public MainWindow()
        {
            InitializeComponent();
            tcpClient=new TcpClient(2 * 1024);
            TextBoxIp.Text = "10.11.10.44";
            TextBoxport.Text = "8080";
        }

        private void ButtonStart_Click(object sender, RoutedEventArgs e)
        {
            string address = this.TextBoxIp.Text;
            string[] arr = address.Split('.');
            if (arr.Length == 4)
            {
                foreach (string item in arr)
                {
                    int i = int.Parse(item);
                    if (i < 0 || i > 255)
                    {
                        return;
                    }
                }
            }
            string port = this.TextBoxport.Text;
            int j = int.Parse(port);
            if (j < 0)
            {
                return;
            }
            tcpClient.Start(address, port);
        }

        private void ButtonSend_CLick(object sender, RoutedEventArgs e)
        {
            string str = TextBoxSender.Text;
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(str);
            tcpClient.Send(bytes);
        }

4、运行效果