Public Sub TCPlisten()
try
Dim listener As New TcpListener(IPAddress.Any, Local_Port)
listener.Start()
listener.BeginAcceptTcpClient(New AsyncCallback(AddressOf AcceptClient), listener) '异步操作
Public Sub AcceptClient(result As IAsyncResult)
try
Dim tempListener As TcpListener = CType(result.AsyncState, TcpListener)
Dim client As TcpClient = tempListener.EndAcceptTcpClient(result)
Dim bytes(1024) As Byte
Dim data As String = Nothing
Dim stream As NetworkStream = client.GetStream()
Dim i As Int32
i = stream.Read(bytes, 0, bytes.Length)
listener.BeginAcceptTcpClient(AddressOf AcceptClient, listener) //应该加在while循环前面吧
While True //这里的循环怎么写可以替换成异步通信
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i) '数字0表示从缓冲区的起始位置，
receiveBytes = System.Text.Encoding.ASCII.GetBytes(data) '转换为字节数
Me.BeginInvoke(New System.EventHandler(AddressOf TCP_Refresh), receiveBytes) //异步委托
i = stream.Read(bytes, 0, bytes.Length)
End While
//这里有部分内容不懂，怎么处理网络流关闭？？？
Catch ex As Exception
listener.Stop()
listener = Nothing
End Try
End Sub
Public Sub TCPserver(sender As Object, e As EventArgs)
Try
Dim str As String = Nothing
str = System.Text.Encoding.ASCII.GetString(sender)
TextBox1.Text = str & vbCrLf & TextBox1.Text
Catch ex As Exception
MsgBox(e.ToString())
End Try
//这里的网络流关闭写在哪里啊？？？ 大家帮帮忙吧？？？
‘ stream.Close()
End Sub
现在问题是，只要客户端发送数据，服务器客户端可以接收数据，就是发送中间会出现没有反应？？？
发现断开连接时候会出现服务器端不会响应，怎么办？？？
特别是其中的异步TCP编程
看了这篇文章有了很大的认识
http://blog.csdn.net/jjjfox/article/details/8212271
