C # Implementation to dynamically allocate IP and release IP

Recently doing a thing to use to dynamically allocate IP and release IP. It's easy to implement in C + +. However, because the network IP settings are related to hardware, C # is not a ready-made interface call. The bridge can only be provided to us by invoking the API or the WMI system. It is mainly through the "Win32_NetworkAdapterConfiguration" of this management class.

Attached below I wrote a demo, I hope to need a friend to help, but also want to master to shoot bricks.

using System;


using System. Collections.generic;


using System. Text;


using System. Management;


using System. Management.instrumentation;


using System. collections;


namespace J_queen


{


Class Program


　　{


static void Main (string[] args)


　　　　{


dictionary<string, managementobject> alldevices = new dictionary<string, managementobject> (); Save Management Objects


list<string> listdescription = new list<string> (); Save Network card Description


//Get management class instances and Management Objects


ManagementClass classinstance = new ManagementClass ("Win32_NetworkAdapterConfiguration");


managementobjectcollection bjectcollection = classinstance.getinstances ();


foreach (ManagementObject obj in objectcollection)


　　　　　　{


///If no IP settings are enabled for network devices skip


if (!) ( BOOL) obj["ipenabled"])


　　　　　　　　{


continue;


　　　　　　　　}


//Storage related information


Alldevices.add ((String) obj["Description"], obj);


Listdescription.add ((String) obj["Description");


　　　　　　}


for (int i = 0; i < listdescription.count;i++)


　　　　　　{


Console.WriteLine (i.tostring () + ":" + listdescription[i]);


　　　　　　}


Console.Write ("Enter the number above the digital number (Q: Exit), select the network card:");


String xinput = Console.ReadLine ();


int devicenumber;


while (xinput!= "q")


　　　　　　{


if (! Int32.TryParse (XInput, out devicenumber))


　　　　　　　　{


console.write ("Input error, reenter:");


Xinput=console.readline ();


continue;


　　　　　　　　}


if (devicenumber>listdescription.count-1 | | devicenumber<0)


　　　　　　　　{


Console.Write ("Enter the number out of range, re-enter:");


Xinput=console.readline ();


continue;


　　　　　　　　}


if (Alldevices.containskey (listdescription[devicenumber))


　　　　　　　　{


Console.WriteLine ("1: Free IP (Release), 2: means to regain IP (renew)");


string ptioninput = Console.ReadLine ();


int option;


if (Int32.TryParse (optioninput, out option))


　　　　　　　　　　{


if (option ==1)


　　　　　　　　　　　　{


int returnvalue = Iprelease ((managementobject) alldevices[listdescription[devicenumber]);


if (returnvalue<2)


　　　　　　　　　　　　　　{


Console.WriteLine ("Successfully released IP");


Console.Write ("Enter the number of the above network card number (Q: Exit), select the network card:");


Xinput=console.readline ();


continue;


　　　　　　　　　　　　　　}


　　　　　　　　　　　　}


else if (option = 2)


　　　　　　　　　　　　{


int returnvalue = Iprenew ((managementobject) alldevices[listdescription[option]);


if (returnvalue<2)


　　　　　　　　　　　　　　{


Console.WriteLine ("Successfully assigned IP");


Console.Write ("Enter the number of the above network card number (Q: Exit), select the network card:");


xinput = Console.ReadLine ();


continue;


　　　　　　　　　　　　　　}


　　　　　　　　　　　　}


Else


　　　　　　　　　　　　{


Console.WriteLine ("Wrong Choice");


Console.Write ("Enter the number of the above network card number (Q: Exit), select the network card:");


Console.ReadLine ();


continue;


　　　　　　　　　　　　}


　　　　　　　　　　}


　　　　　　　　}


　　　　　　}


　　　　}


///<summary>


///Function: Reassign IP
for the specified network adapter

///</summary>


///<param name= "obj" >managementobject obj--management object corresponding to the NIC </param>


///<returns> return values, integers, 0 and 1 for Success </returns>


public static int iprenew (ManagementObject obj)


　　　　{


Managementbaseobject utpar = null;


Utpar = obj. InvokeMethod ("RenewDHCPLease", NULL, NULL);


return Convert.ToInt32 (outpar["returnvalue");


　　　　}


///<summary>


///Function: Frees the specified network adapter IP


///</summary>


///<param name= "obj" >managementobject obj--the management object corresponding to the NIC </param>


///<returns> return values, integers, 0 and 1 for success </returns>


public static int iprelease (ManagementObject obj)


　　　　{


Managementbaseobject utpar = null;


Utpar = obj. InvokeMethod ("ReleaseDHCPLease", NULL, NULL);


return Convert.ToInt32 (outpar["returnvalue");


　　　　}


　　}


}