vb.net 教程 7-1 本地网络信息的获取 4 TCP/UDP连接情况

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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

TextBox1.Text &= "TCp侦听：===================" & vbCrLf

For Each tcpIPEP As IPEndPoint In IPGProperties.GetActiveTcpListeners

TextBox1.Text &= tcpIPEP.Address.ToString & ":" & tcpIPEP.Port.ToString & vbCrLf

TextBox1.Text &= "Udp侦听：===================" & vbCrLf

For Each udpIPEP As IPEndPoint In IPGProperties.GetActiveUdpListeners

TextBox1.Text &= udpIPEP.Address.ToString & ":" & udpIPEP.Port.ToString & vbCrLf

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 教程目录

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原文链接：https://blog.csdn.net/UruseiBest/article/details/81811628

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