How to disable/enable network connection in c#

Question

Basically I\'m running some performance tests and don\'t want the external network to be the drag factor. I\'m looking into ways of disabling network LAN. What is an effecti

Answer 1

If you are looking for a very simple way to do it, here you go:

    System.Diagnostics.Process.Start("ipconfig", "/release"); //For disabling internet
    System.Diagnostics.Process.Start("ipconfig", "/renew"); //For enabling internet

Make sure you run as administrator. I hope you found this helpful!

Answer 2

For Windows 10 Change this: for diable ("netsh", "interface set interface name=" + interfaceName + " admin=DISABLE") and for enable ("netsh", "interface set interface name=" + interfaceName + " admin=ENABLE") And use the program as Administrator

    static void Disable(string interfaceName)
    {

        //set interface name="Ethernet" admin=DISABLE
        System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface name=" + interfaceName + " admin=DISABLE");
        System.Diagnostics.Process p = new System.Diagnostics.Process();

        p.StartInfo = psi;
        p.Start();
    }

    static void Enable(string interfaceName)
    {
        System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface name=" + interfaceName + " admin=ENABLE");
        System.Diagnostics.Process p = new System.Diagnostics.Process();
        p.StartInfo = psi;
        p.Start();
    }

And use the Program as Administrator !!!!!!

Answer 3

best solution is disabling all network adapters regardless of the interface name is disabling and enabling all network adapters using this snippet (Admin rights needed for running , otherwise ITS WONT WORK) :

  static void runCmdCommad(string cmd)
    {
        System.Diagnostics.Process process = new System.Diagnostics.Process();
        System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
        //startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
        startInfo.FileName = "cmd.exe";
        startInfo.Arguments = $"/C {cmd}";
        process.StartInfo = startInfo;
        process.Start();
    }
   static void DisableInternet(bool enable)
    {
        string disableNet = "wmic path win32_networkadapter where PhysicalAdapter=True call disable";
        string enableNet = "wmic path win32_networkadapter where PhysicalAdapter=True call enable";
        runCmdCommad(enable ? enableNet :disableNet);
    }

Answer 4

Using netsh Command, you can enable and disable “Local Area Connection”

  interfaceName is “Local Area Connection”.

  static void Enable(string interfaceName)
    {
     System.Diagnostics.ProcessStartInfo psi =
            new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface \"" + interfaceName + "\" enable");
        System.Diagnostics.Process p = new System.Diagnostics.Process();
        p.StartInfo = psi;
        p.Start();
    }

    static void Disable(string interfaceName)
    {
        System.Diagnostics.ProcessStartInfo psi =
            new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface \"" + interfaceName + "\" disable");
        System.Diagnostics.Process p = new System.Diagnostics.Process();
        p.StartInfo = psi;
        p.Start();
    }

Answer 5

I modfied the best voted solution from Kamrul Hasan to one methode and added to wait for the exit of the process, cause my Unit Test code run faster than the process disable the connection.

private void Enable_LocalAreaConection(bool isEnable = true)
    {
        var interfaceName = "Local Area Connection";
        string control;
        if (isEnable)
            control = "enable";
        else
            control = "disable";
        System.Diagnostics.ProcessStartInfo psi =
               new System.Diagnostics.ProcessStartInfo("netsh", "interface set interface \"" + interfaceName + "\" " + control);
        System.Diagnostics.Process p = new System.Diagnostics.Process();
        p.StartInfo = psi;
        p.Start();
        p.WaitForExit();
    }

Answer 6

Found this thread while searching for the same thing, so, here is the answer :)

The best method I tested in C# uses WMI.

http://www.codeproject.com/KB/cs/EverythingInWmi02.aspx

Win32_NetworkAdapter on msdn

C# Snippet : (System.Management must be referenced in the solution, and in using declarations)

SelectQuery wmiQuery = new SelectQuery("SELECT * FROM Win32_NetworkAdapter WHERE NetConnectionId != NULL");
ManagementObjectSearcher searchProcedure = new ManagementObjectSearcher(wmiQuery);
foreach (ManagementObject item in searchProcedure.Get())
{
    if (((string)item["NetConnectionId"]) == "Local Network Connection")
    {
       item.InvokeMethod("Disable", null);
    }
}