用VB做一个实现互联网的连接聊天程序

这个很简单，一个服务端和一个客户端。

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我们先画一个服务端界面，两个textbox，一个command，一个winsock,非别为:Text1,text2,command1

text1用于填写你需要发送的信息

text2用于显示接收的信息

command1用于发送信息

winsock1用于创建连接

客户端和服务端的界面一样。

接下来我们开始写代码：

服务端：

Private Sub Command1_Click()

Dim a As String

Text2.Text = Text2.Text vbCrLf Text1.Text

a = Text1.Text

Winsock1.SendData a

End Sub

Private Sub Form_Load()

Winsock1.Close

Winsock1.LocalPort = 4981 '这里填写你要监听的端口

Winsock1.Listen '开始监听

End Sub

Private Sub Winsock1_ConnectionRequest(ByVal requestID As Long)

Winsock1.Close

Winsock1.Accept requestID

End Sub

Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)

Dim a As String

Winsock1.GetData a

Text2.Text = Text2.Text vbCrLf a

End Sub

Private Sub Winsock1_Error(ByVal Number As Integer, Description As String, ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, ByVal HelpContext As Long, CancelDisplay As Boolean)

Winsock1.Close '如果出错则关闭连接

End Sub

客户端：

Private Sub Command1_Click()

Dim a As String

Text2.Text = Text2.Text vbCrLf Text1.Text

a = Text1.Text vbCrLf

Winsock1.SendData a

End Sub

Private Sub Form_Load()

Winsock1.Close

Winsock1.RemoteHost = "wenlvzhao.3322.org" '这里填写你的静态IP或者是动态域名

Winsock1.RemotePort = 4981 '这里填写连接的端口

Winsock1.Connect

End Sub

Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)

Dim a As String

Winsock1.GetData a

Text2.Text = Text2.Text vbCrLf a

End Sub

Private Sub Winsock1_Error(ByVal Number As Integer, Description As String, ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, ByVal HelpContext As Long, CancelDisplay As Boolean)

Winsock1.Close '如果出错则关闭连接

End Sub

vb.net2005 tcp聊天程序问题

‘客户端向这样写：在窗体说放两个文本框、两个标签、两个按钮、一个列表框

Imports System.Net

Imports System.Net.Sockets

Imports System.IO

Imports System.Threading

Public Class Form1

'网络基础数据流

Private ns As NetworkStream

Private swriter As StreamWriter

Private nsread As StreamReader

Private tcpclient As TcpClient

Private tcpconnected As Boolean = False

Private clisocket As Socket

Private mythread As Thread

'发送

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

If Me.TextBox2.Text "" Then

swriter.WriteLine(Me.TextBox2.Text)

swriter.Flush()

Me.TextBox2.Text = ""

Else

MessageBox.Show("发送信息不能为空！", "错误提示")

End If

End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

If disposing Then

If Not (components Is Nothing) Then

components.Dispose()

End If

End If

MyBase.Dispose(disposing)

End Sub

'建立连连接

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

Dim ipremote As IPAddress

Dim tcpclient As TcpClient

Try

ipremote = IPAddress.Parse(Me.TextBox1.Text)

Catch ex As Exception

MessageBox.Show("IP地址不合法！", "错误提示")

End Try

Try

tcpclient = New TcpClient(Me.TextBox1.Text, 8000)

ns = tcpclient.GetStream

swriter = New StreamWriter(ns)

Me.StatusBar1.Text = "已经连接上"

Me.Button2.Enabled = False

Me.Button1.Enabled = True

tcpconnected = True

Catch ex As Exception

MessageBox.Show("无法与远程8000端口建立连接！", "错误提示")

End Try

End Sub

Private Sub listen()

Try

Dim tcplistener As New TcpListener(IPAddress.Parse("127.0.0.1"), 8000)

tcplistener.Start()

tcpclient = tcplistener.AcceptTcpClient

ns = tcpclient.GetStream()

nsread = New StreamReader(ns)

While True

Dim msg As String = nsread.ReadLine

If msg = "stop" Then

tcplistener.Stop()

ns.Close()

nsread.Close()

mythread.Abort()

Else

Dim mytime As String = DateTime.Now.ToShortTimeString

Me.ListBox1.Items.Add(mytime + " " + msg)

End If

End While

Catch ex As System.Security.SecurityException

MessageBox.Show("侦听失败！", "错误")

End Try

End Sub

End Class

用vb.net实现网络通信

用 vb.net socket通信

Dim th As Threading.Thread

2 Dim tcpl As System.Net.Sockets.TcpListener

3

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

5 th = New System.Threading.Thread(New System.Threading.ThreadStart(AddressOf MyListen))

6 th.Start()

7 End Sub

8

9 Public Sub SendMessage()Sub SendMessage(ByVal IP As String, ByVal SendMsg As String)

10 Try

11 If IP "" Then

12 Dim tcpc As New System.Net.Sockets.TcpClient(IP, 5656)

13 Dim tcpStream As Net.Sockets.NetworkStream = tcpc.GetStream

14 Dim reqStream As New IO.StreamWriter(tcpStream)

15 reqStream.Write(SendMsg)

16 reqStream.Flush()

17 tcpStream.Close()

18 tcpc.Close()

19 End If

20 Catch ex As Exception

21 MsgBox(ex.Message.ToString)

22 End Try

23 End Sub

24 Private Sub MyListen()Sub MyListen()

25 Try

26 Dim ipAddress As System.Net.IPAddress = System.Net.Dns.Resolve(System.Net.Dns.GetHostName).AddressList(0)

27 tcpl = New System.Net.Sockets.TcpListener(ipAddress, 5656)

28 tcpl.Start()

29 While True

30 Dim s As System.Net.Sockets.Socket = tcpl.AcceptSocket()

31 Dim MyBuffer(1024) As Byte

32 Dim i As Integer

33 i = s.Receive(MyBuffer)

34 If i 0 Then

35 Dim lstrRec As String

36 Dim j As Integer

37 For j = 0 To i - 1

38 TextBox1.Text += Chr(MyBuffer(j)) ","

39 Next

40 End If

41 End While

42 Catch ex As Exception

43 MsgBox(ex.Message.ToString)

44 End Try

45 End Sub

46

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

48 SendMessage("192.168.0.61", TextBox2.Text)

49 End Sub

如何用VB.net作的网络聊天工具

很复杂的,而且聊天工具都不是用VB 做的

只是可视化好点

用VB只是可以做一个界面看看

具体的不用的,,,,

JAVA

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