关于聊天程序

[rainbowsoftware]

这是我找到的一胩利用线程写的，请问我如何把它改成不利用线程的？
客户端
Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Imports System.Threading

Public Class frmClient
'客户端Socket
Dim cliSocket As Socket
'连接状态
Dim IsConnected As Boolean = False
'接收信息线程
Dim myThread As Thread

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim remoteEP As New IPEndPoint(Net.IPAddress.Parse("127.0.0.1"), 11000)
cliSocket = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
Try
cliSocket.Connect(remoteEP)
ListBox1.Items.Add("连接服务端成功!")
IsConnected = True

myThread = New Thread(AddressOf ReciveMsg)
myThread.Start()
Catch ex As Exception
ListBox1.Items.Add(ex.Message)
End Try
End Sub

Sub ReciveMsg()
Dim bytes() As Byte = New Byte(1024) {}
Dim data As String = String.Empty
Dim tokens() As String

While True
Dim bytesRec As Integer = cliSocket.Receive(bytes)
data = Encoding.UTF8.GetString(bytes, 0, bytesRec)

tokens = data.Trim.Split("|")
Select Case tokens(0) '分析接收到的数据，可自己定义更多一些
Case "Exit"
IsConnected = False
BeginInvoke(New EventHandler(AddressOf AddInfo), tokens(1)) 'Invoke保证线程安全
cliSocket.Shutdown(SocketShutdown.Both)
cliSocket.Close()
Exit Sub
Case "Chat"
BeginInvoke(New EventHandler(AddressOf AddInfo), tokens(1)) 'Invoke保证线程安全
End Select

End While

End Sub

'发送信息
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim msg As Byte() = Encoding.UTF8.GetBytes("Chat|" + TextBox1.Text)
Dim bytesSent As Integer = cliSocket.Send(msg)

ListBox1.Items.Add("本地信息: " + TextBox1.Text)
TextBox1.Text = ""
End Sub

'非UI线程调用窗体控件，保证线程安全。与聊天实现无关。
Sub AddInfo(ByVal sender As System.Object, ByVal e As System.EventArgs)
ListBox1.Items.Add("远程信息: " + sender.ToString)
End Sub

'关闭窗口时发关退出信息并清理资源
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
If IsConnected Then
Dim msg As Byte() = Encoding.UTF8.GetBytes("Exit|客户端退出: " + Me.Handle.ToString)
Dim bytesSent As Integer = cliSocket.Send(msg)
myThread.Abort()
End If

End Sub


End Class

服务端
Imports System.Net
Imports System.Net.Sockets
Imports System.Threading
Imports System.Text
Imports System.Diagnostics

Public Class frmServer

'服务端的Socket
Dim listener As Socket
'与客户端会话的Socket
Dim mySocket As Socket
'服务端的运行状态
Dim IsRun As Boolean = False
'监听接收数据线程
Dim myThread As Thread

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
myThread = New Thread(AddressOf Listen)
myThread.Start()
End Sub

Public Sub Listen()
Dim bytes() As Byte = New [Byte](1024) {}
Dim data As String = String.Empty
Dim tokens() As String

Dim localEndPoint As New IPEndPoint(Net.IPAddress.Parse("127.0.0.1"), 11000)
'初始化socket
listener = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
'绑定端口
listener.Bind(localEndPoint)
'开始监听
listener.Listen(10)

BeginInvoke(New EventHandler(AddressOf AddInfo), "服务端已启动，正在等待连接......")

mySocket = listener.Accept()
IsRun = True

While True
Dim bytesRec As Integer = mySocket.Receive(bytes)
data = Encoding.UTF8.GetString(bytes, 0, bytesRec)

tokens = data.Trim.Split("|")
Select Case tokens(0) '分析接收到的数据，可自己定义更多一些
Case "Chat"
BeginInvoke(New EventHandler(AddressOf AddInfo), tokens(1)) 'Invoke保证线程安全
Case "Exit"
IsRun = False
BeginInvoke(New EventHandler(AddressOf AddInfo), tokens(1)) 'Invoke保证线程安全
mySocket.Shutdown(SocketShutdown.Both)
mySocket.Close()
Exit Sub
End Select
End While

End Sub

'发送信息
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
Dim msg As Byte() = Encoding.UTF8.GetBytes("Chat|" + TextBox1.Text)
mySocket.Send(msg)
ListBox1.Items.Add("本地信息: " + TextBox1.Text)

TextBox1.Text = ""
End Sub

'非UI线程调用窗体控件，保证线程安全。与聊天实现无关。
Sub AddInfo(ByVal sender As System.Object, ByVal e As System.EventArgs)
ListBox1.Items.Add("远程信息: " + sender.ToString)
End Sub

'关闭窗口时发关退出信息并清理资源
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
If IsRun Then
Dim msg As Byte() = Encoding.UTF8.GetBytes("Exit|服务端退出: " + Me.Handle.ToString)
Dim bytesSent As Integer = mySocket.Send(msg)
End If
listener.Close()
mySocket = Nothing
myThread.Abort()
End Sub

End Class

[rainbowsoftware]

大家来谈谈

[rainbowsoftware]

高手如果不用线程，如何分别实现发送与接收信息？