CODEWITHSUNDEEP
c#network-programmingdhcp
Charles Laird
Charles Laird

Reputation: 23

C# Poll multiple devices to determine IP type: Static or DHCP

Would like to know the c# code to actually retrieve the IP type: Static or DHCP based on a list of devices I will enter.

Output to be viewed:

Device name:  IP Address:   MAC Address:         Type:  
Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller NULL    00:00:F3:44:C6:00   DHCP
Generic Marvell Yukon 88E8056 based Ethernet Controller 192.168.1.102   00:00:F3:44:D0:00   DHCP

            ManagementClass objMC = new ManagementClass("Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection objMOC = objMC.GetInstances();

        txtLaunch.Text = ("Name\tIP Address\tMAC Address\tType" +"\r\n");

        foreach (ManagementObject objMO in objMOC)
        {
            StringBuilder builder = new StringBuilder();

            object o = objMO.GetPropertyValue("IPAddress");
            object m = objMO.GetPropertyValue("MACAddress");

            if (o != null || m != null)
            {
                builder.Append(objMO["Description"].ToString());
                builder.Append("\t");
                    if (o != null)
                       builder.Append(((string[])(objMO["IPAddress"]))[0].ToString());
                    else
                       builder.Append("NULL");
                builder.Append("\t");
                builder.Append(m.ToString());
                builder.Append("\t");
                builder.Append(Convert.ToBoolean(objMO["DHCPEnabled"]) ? "DHCP" : "Static");
                builder.Append("\r\n");
            }

            txtLaunch.Text = txtLaunch.Text + (builder.ToString());

This gave me 90% of what I am looking to achieve - the code worked out well. The next portion is to specify a device on the network to obtain the information remotely. I noticed the one comment below that stated this was impossible without WMI. This is certainly much closer than I was. I'm convinced this can be accomplished. I'm open to recommendations here.

Upvotes: 1

Views: 2013

Answers (3)

Mike Marshall
Mike Marshall

Reputation: 7850

EDIT: sorry, some properties can be NULL on some adapters. Fixed below

ManagementClass objMC = new ManagementClass(
                        "Win32_NetworkAdapterConfiguration");
ManagementObjectCollection objMOC = objMC.GetInstances();

Console.WriteLine("Name\tIP Address\tMAC Address\tType");

foreach (ManagementObject objMO in objMOC)
{

  StringBuilder builder = new StringBuilder();

  builder.Append(objMO["Description"].ToString());
  builder.Append("\t");
  object o = objMO.GetPropertyValue("IPAddress");

  if (o != null)
      builder.Append(((string[])(objMO["IPAddress"]))[0].ToString());
  else
      builder.Append("NULL");

  builder.Append("\t");

  object m = objMO.GetPropertyValue("MACAddress");

  if (m != null)
      builder.Append(m.ToString());
  else
      builder.Append("NULL");

  builder.Append("\t");
  builder.Append(Convert.ToBoolean(objMO["DHCPEnabled"]) ? "DHCP" : "Static");
  Console.WriteLine(builder.ToString());
}

Upvotes: 2

Joe
Joe

Reputation: 42607

If you're trying to do this for remote hosts, you won't be able to do this. You'll need access to the DHCP server and its logging to identify this information.

Edit: of course, through WMI works if that's available.

Upvotes: 0

EgorBo
EgorBo

Reputation: 6142

Look at http://www.codeguru.com/csharp/csharp/cs_network/internetweb/article.php/c6023/ hope this helps

Upvotes: 0

Related Questions