vb.net 教程 7-1 本地网络信息的获取 4 TCP/UDP连接情况

￡神魔★判官ぃ 2022-09-11 03:30 123阅读 0赞

获得本地网络连接情况也是通过IPGlobalProperties类来完成的，

通过 GetActiveTcpConnections获得所有的TCP连接的信息(TcpConnectionInformation类)  
通过 GetActiveTcpListeners 获得TCP侦听信息(IPEndPoint类)   
通过 GetActiveUdpListeners 获得UDP侦听信息(IPEndPoint类)   
然后分别用for each来循环获得对应类的信息

具体代码如下：

Private Sub Button3\_Click(sender As Object, e As EventArgs) Handles Button3.Click  
        Dim IPGProperties As IPGlobalProperties = IPGlobalProperties.GetIPGlobalProperties  
   
        TextBox1.Text = "TCP连接：===================" & vbCrLf  
        For Each tcpConnectionInfo As TcpConnectionInformation In IPGProperties.GetActiveTcpConnections  
            TextBox1.Text &= tcpConnectionInfo.LocalEndPoint.Address.ToString & ":" & tcpConnectionInfo.LocalEndPoint.Port.ToString & "-" \_  
                                & tcpConnectionInfo.RemoteEndPoint.Address.ToString & tcpConnectionInfo.RemoteEndPoint.Port.ToString \_  
                                & " " & getState(tcpConnectionInfo.State) & vbCrLf  
        Next  
   
        TextBox1.Text &= "TCp侦听：===================" & vbCrLf  
        For Each tcpIPEP As IPEndPoint In IPGProperties.GetActiveTcpListeners  
            TextBox1.Text &= tcpIPEP.Address.ToString & ":" & tcpIPEP.Port.ToString & vbCrLf  
        Next  
   
        TextBox1.Text &= "Udp侦听：===================" & vbCrLf  
        For Each udpIPEP As IPEndPoint In IPGProperties.GetActiveUdpListeners  
            TextBox1.Text &= udpIPEP.Address.ToString & ":" & udpIPEP.Port.ToString & vbCrLf  
        Next  
    End Sub  
 运行如下：

由于.net平台下C\#和vb.NET很相似，本文也可以为C\#爱好者提供参考。

学习更多vb.net知识，请参看[vb.net教程][vb.net] 目录  
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