Question

我想从多个tcp / ip设备读取数据。我想在vb.net或c＃中创建一个应用程序，它将一次与多个设备通信。如何一次连接多个设备？ IP地址为xxx.xx.xx.100，xxx.xx.xx.101，xxx.xx.xx.102，xxx.xx.xx.103，xxx.xx.xx.104，xxx.xx.xx.105等等和相同的端口号8000。我正在向连接设备发送请求＆amp;设备给出响应。我能够从设备读取数据。用于检查连接状态的定时器＆amp;以100毫秒的间隔轮询。如何连接＆amp;一次轮询多个设备而不阻塞其他设备？请帮帮我。

Dim tcpclient As System.Net.Sockets.TcpClient
Dim serverStream As NetworkStream
Dim outStream As Byte()
Dim inStream(8192) As Byte
Dim sendstring As String
Dim client_connected as Boolean = False

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs)    Handles Timer1.Tick

    // interval 100ms
    If client_connected = False Then
        tcpclient_1 = New System.Net.Sockets.TcpClient
        tcpclient_1.SendTimeout = 10
        tcpclient_1.ReceiveTimeout = 10

        Try
            tcpclient_1.Connect("xxx.xx.xx.100", 8000)
            client_connected = True
            label1.text = "connected"

            sendstring = "xxxx"
            serverStream = tcpclient_1.GetStream()
            outStream = System.Text.Encoding.Default.GetBytes()
            serverStream.Write(outStream, 0, outStream.Length)
            serverStream.Flush()

            Dim responseData As [String] = [String].Empty
            responseData = serverStream.Read(inStream, 0, _
                           CInt(tcpclient_1.ReceiveBufferSize))
            label2.text = responseData 
        Catch ex As Exception
            client_connected = False
            label1.text = "disconnected"
        End Try
    Else
        label1.text = "connected"
    End If
End Sub

如何使用TCP / IP客户端连接多个具有相同端口号的IP地址？

0 个答案: