也发一个VB.net里面基于socket实现TCP/IP通许范例。

Imports System

Imports System.Net

Imports System.Net.Sockets

Imports System.Text

Imports System.Threading

Imports Microsoft.VisualBasic

Public Class Form1

    Dim s As Socket = Nothing

    Dim t As Thread





    Public Sub WaitData()

        s = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp) '使用TCP协议

        Dim localEndPoint As New IPEndPoint(IPAddress.Parse("192.168.1.12"), 1024) ' 指定IP和Port

        s.Bind(localEndPoint)  ' 绑定到该Socket

        s.Listen(100)  ' 侦听，考试#大提示最多接受100个连接

        While (True)

            Dim bytes(1024) As Byte ' 用来存储接收到的字节

            Dim ss As Socket = s.Accept()  '若接收到,则创建一个新的Socket与之连接

            ss.Receive(bytes)  ' 接收数据，若用ss.send(Byte()),则发送数据





            'Dim Send_bytes() As Byte = {"1", "3"} ' 用来存储接收到的字节

            'ss.Send(Send_bytes(0))



            Call ShowinListBox(Encoding.Unicode.GetString(bytes), ListBox1)

            '若使用Encoding.ASCII.GetString(bytes),则接收到的中文字符不能正常显示

        End While

    End Sub



    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        t = New Thread(AddressOf WaitData) '建立新的线程

        t.Start()  '启动线程

        Button1.Enabled = False '按钮不可用，避免另启线程

    End Sub



    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Try

            s.Close()  '关闭Socket

            t.Abort()  '中止线程

        Catch

        Finally

            Button1.Enabled = True '启用BtnStart

        End Try

    End Sub



    Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

        Try

            s.Close()  '关闭Socket

            t.Abort()  '中止线程

        Catch

        Finally

            Button1.Enabled = True '启用BtnStart

        End Try

    End Sub



    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load



    End Sub



    

End Class

Imports System.Net.Sockets

Imports System.Net

Imports System.Text





Public Class Form1



    Private s = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)



    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load



    End Sub



    Private Sub Button_Open_Click(sender As Object, e As EventArgs) Handles Button_Open.Click

        Try

            Dim localEndPoint As New IPEndPoint(IPAddress.Parse(Me.TextBox_Server_IP.Text), Me.TextBox_Server_Port.Text)



            s.Connect(localEndPoint)



 

        Catch ex As Exception

            MessageBox.Show(ex.Message)

        End Try

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Try

            Dim Gsz_bytes() As Byte



            ' Gsz_bytes = Encoding.Unicode.GetBytes(TextBox_Send.Text)

            ' Gsz_bytes = Encoding.UTF8.GetBytes(TextBox_Send.Text) '这是可以的

            Gsz_bytes = System.Text.Encoding.ASCII.GetBytes(TextBox_Send.Text)

            s.Send(Gsz_bytes)





        Catch ex As Exception

            MessageBox.Show(ex.Message)

        End Try



    End Sub



    Private Sub Button_Close_Click(sender As Object, e As EventArgs) Handles Button_Close.Click

        Try

            s.Close()

        Catch ex As Exception

            MessageBox.Show(ex.Message)

        End Try



    End Sub

End Class