RichTextBox1.AppendText('Gateway: ' & & vbCrLf)įor Each DnsAddress In RichTextBox1.AppendText('IP Address and Subnet: ' & & vbCrLf) ' Get IP Address(es) and subnet(s) informationĭim IpAddress As UnicastIPAddressInformationįor Each IpAddress In

RichTextBox1.AppendText('Interface GUID: ' & networkCard.Id & vbCrLf & 'Name: ' & networkCard.Id & vbCrLf & 'Description: ' & networkCard.Description & vbCrLf & 'Status: ' & & vbCrLf & 'Speed: ' & (networkCard.Speed / 1000000).ToString('#,000') & ' Mbps' & vbCrLf & 'MAC Address: ' & & vbCrLf) ' if gateway address is NOT 0.0.0.0 and the network card status is UP then we've found the main network card Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Loadįor Each networkCard As NetworkInterface In NetworkInterface.GetAllNetworkInterfacesįor Each gatewayAddr As GatewayIPAddressInformation In And then change their connectivity back to the other network when it comes up again. I have none and have no way to figure out how to re-establish connectivity to them viaĪ different network if this scenario occured. As far as network shares I can't help you there. Or don't disable the NIC on that network in case it comes back up so you could then turn off the WI-FI NIC or something. So I would imagine that with these codes you could splice something together that could detect network shutdown, disable the NIC on that network, enable the NIC for WI-FI, get the status of the WI-FI NIC if needed although I'm not sure that info is necessary. Net rev or maybe it's the O/S high enough that had the The bottom code works for me to detect if the network is up but when I originally posted this code a few years ago someone I posted it for was running an earlier version of Visual Studio on an older O/S and it would not work for them for some reason. But the status of my 10/100 base T NIC for hardwiring to a network connection (router, whatever) doesn't show up because it is disabled since I don't use it. Asl long as the NIC vendor allows WMI to enable and disable their NIC I guess which they probably all do nowadays.Īnd the code below should give you the status of your NICs I think. Has an IP stack associated to it I suppose. Well this link has a project you can download that will allow you to enable and disable network adapters whether they be WI-FI or 10/100base T NICs or whatever The goal is allow laptop users to continue having a network connection even if the local area stop working for whatever reason. if not, the code shouldĪttempt to initiate reconnecting the users' network shares.

Then, it would be nice to have the code verify if all network shares are still available. I am looking to develop a simple vb.net code that will sense whenever a local area network becomes inactive, and to enable the wireless adapter.

Local area connection disabled