vb.net下的socket编程，简易篇

 1Dim th As Threading.Thread
 2    Dim tcpl As System.Net.Sockets.TcpListener
 3
 4    Private 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(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()
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(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
48        SendMessage("192.168.0.61", TextBox2.Text)
49    End Sub