Question

Is it possible to set IP address (or anything else) for a network interface which is currently down?

I am using WMI, that means ManagementObjectCollection and Invoke methods. But it seems there is no way how to configure IP in c# on a network adapter which is currently down – cable not connected?

There is no error message.
For example, i set IP manualy for wifi interface, and by the WMI i want to set it to DHCP.

    ManagementObjectSearcher query = new ManagementObjectSearcher("Select * from Win32_NetworkAdapterConfiguration where SettingID=\"" + selectedProfile.AdapterGUID + "\"");
    ManagementObjectCollection moc = query.Get();

    foreach (ManagementObject mo in moc)
    {
        ManagementBaseObject newDHCPIP = mo.GetMethodParameters("EnableDHCP");
        mo.InvokeMethod("EnableDHCP", newDHCPIP, null);
        ManagementBaseObject newDHCPDNS = mo.GetMethodParameters("SetDNSServerSearchOrder");
        newDHCPDNS["DNSServerSearchOrder"] = null;
        mo.InvokeMethod("SetDNSServerSearchOrder", newDHCPDNS, null);
        ManagementBaseObject newDHCPRenew = mo.GetMethodParameters("RenewDHCPLease");
        mo.InvokeMethod("RenewDHCPLease", newDHCPRenew, null);
        mo.Dispose();
    }

I am 100% percent sure i am selecting right network adapter. But when i set it, and look at configuration (by windows network and sharing center, adapter properities) there is still static IP.

It is working only after i connect to the wifi network, then i look at configuration and there is DHCP

Answer 1

I think the best solution will be to use netsh, because WMI is not working correctly.