Adding DNS Entries in .NET

Adding DNS A, CNAME, NS, and MX records in .NET is simple when you use WMI. Using WMI, you can add records in a matter of a few seconds.  Please take a look at the code below.  Essentially with WMI you tap into a remote machine, then you Create a ManagementObject, and initiate theWMI method CreateInstanceFromPropertyData.

        Label1.Text = "";

 
                    if (txtPassword.Text.Length < 2 || txtUsername.Text.Length < 2)

 
                    {


                        this.Label1.Style["text-align"] = "left";

 
                        Label1.ForeColor = Color.Maroon;

 
                        Label1.Text = "Please enter username and/or password. ";

 
                    }


                    else

 
                    {


                        string remoteMachine = txtServer.Text;

 
                       


                        ConnectionOptions co = new ConnectionOptions();

 
                        co.Username = txtUsername.Text;


                        co.Password = txtPassword.Text;


                        System.Net.IPHostEntry h =

 
                    System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());

 
                        string IPAddress = h.AddressList.GetValue(0).ToString();

 
                        string lm = System.Net.Dns.GetHostName().ToString();


 
                        Label1.ForeColor = Color.Black;

 
                        co.Impersonation = ImpersonationLevel.Impersonate;

 
                        // co.Impersonation = ImpersonationLevel.

 
                        co.EnablePrivileges = true;

 
                        co.Authentication = AuthenticationLevel.PacketPrivacy;

 
                        Label1.ForeColor = Color.Black;


 
                        ConnectionOptions connOptions = new ConnectionOptions();

 
                        connOptions.Impersonation = ImpersonationLevel.Impersonate;

 
                        connOptions.EnablePrivileges = true;

 
                   


                    try

 
                        {


                            ManagementScope oMs = new ManagementScope("\\\\" + remoteMachine + "\\root\\microsoftdns", co);

 
                           


                          // string queryStr = "SELECT * FROM MicrosoftDNS_AType";

 
                         //   ObjectQuery oQuery = new ObjectQuery(queryStr);

 
                         //   ManagementObjectSearcher oSearcher = new ManagementObjectSearcher(oMs, oQuery);


 
                            ObjectGetOptions objectGetOptions = new ObjectGetOptions();

 
                            string type;

 
                            ManagementPath managementPath;

 
                            managementPath = new ManagementPath("MicrosoftDNS_AType");

 
                        


                            try

 
                            {


                                type = words[1].ToString().ToLower();


                            }


                            catch

 
                            {


                                type = "a";

 
                            }



                            if (type == "ipv6" || type == "aaaa")

 
                                managementPath = new ManagementPath("MicrosoftDNS_AAAAType");

 
                            if (type == "a")

 
                                managementPath = new ManagementPath("MicrosoftDNS_AType");

 
                            if (type == "cname")

 
                                managementPath = new ManagementPath("MicrosoftDNS_CNAMEType");

 
                            if (type == "mx")

 
                                managementPath = new ManagementPath("MicrosoftDNS_MXType");

 
                            if (type == "ns")

 
                                managementPath = new ManagementPath("MicrosoftDNS_NSType");

 
                        


                            ManagementClass oClass = new ManagementClass(oMs, managementPath, objectGetOptions);

 
                            ManagementBaseObject inParams = oClass.GetMethodParameters("CreateInstanceFromPropertyData");

 
                            ManagementBaseObject vars =

 
                                oClass.GetMethodParameters("CreateInstanceFromPropertyData");

 
                            string DN = words[2].ToString();

 
                            string IPA = words[4].ToString();

 
                            string FQDN = words[3].ToString() + "." + DN;

 
                            vars["DnsServerName"] = txtServer.Text;

 
                            vars["ContainerName"] = DN;

 
                          


                            if (type == "a")

 
                            vars["IPAddress"] = IPA;

 
                           if (type == "cname")

 
                               vars["PrimaryName"] = IPA;

 
                           if (type == "mx")

 
                               vars["MailExchange"] = IPA;

 
                           if (type == "ns")

 
                               vars["NSHost"] = IPA;

 
                           if (type == "ipv6" || type == "aaaa")

 
                               vars["IPv6Address"] = IPA;

 
                         


                            vars["OwnerName"] = FQDN;    


 
                            ManagementBaseObject outParams = oClass.InvokeMethod("CreateInstanceFromPropertyData", vars, null);

 
                            Label1.Text += "DNS Entry was successfully added!<br />";


 
                            string status = "undetermined";

 
          


                                status = "<font color='green'>Successful</font>";

 
                           


                            Label1.Text += "DNS " + type.ToUpper() + " entry creation: <b>" + FQDN

 
                            + "</b>" + " - " + status;

 
                            Label1.Text += "<br />";


 
                            this.Label1.Style["text-align"] = "center";

 
                           


                        }


                        catch (Exception ex)

 
                        {


                            Label1.ForeColor = Color.Maroon;

 
                            Label1.Text += "Coudlnt' Create Entry: " +

 
                                "May be duplicate entry or wrong information, check syntax!";

 
                        }


                    }