【转载】C#实现动态分配IP和释放IP （DHCP）

最近在做一个东西，要用到动态分配IP和释放IP。在C++下很容易就可以实现。但是由于因为网络IP设置是要涉及到硬件,C#是没有现成接口调用的.只能通过调用API或者是WMI这道系统提供给我们的桥梁.主要是通过"Win32_NetworkAdapterConfiguration"这个管理类。
下面附上我写的一个Demo，希望对需要的朋友有帮助，更希望高手来拍砖。

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>(); //保存管理对象
List<string> listDescription = new List<string>(); //保存网卡描述

//获得管理类实例和管理对象
ManagementClass classInstance = new ManagementClass( "Win32_NetworkAdapterConfiguration" );
ManagementObjectCollection bjectCollection = classInstance.GetInstances();

foreach (ManagementObject obj in objectCollection)
{
//如果没有启用IP设置的网络设备则跳过
if (!(bool)obj[ "IPEnabled" ])
{
continue;
}

//存储相关信息
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( "输入上面的数字编号(q：退出)，选择网卡：" );
string xInput = Console.ReadLine();
int deviceNumber;
while (xInput != "q" )
{
if(!Int32.TryParse(xInput, out deviceNumber))
{
Console.Write( "输入错误,重新输入： " );
xInput=Console.ReadLine();
continue;
}
if (deviceNumber>listDescription.Count-1 || deviceNumber<0)
{
Console.Write( "输入的编号超出范围，重新输入： " );
xInput=Console.ReadLine();
continue;
}
if (allDevices.ContainsKey(listDescription[deviceNumber]))
{
Console.WriteLine( "1:表示释放IP(Release)，2:表示重新获得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( "成功释放IP" );
Console.Write( "输入上面网卡的数字编号(q：退出)，选择网卡：" );
xInput=Console.ReadLine();
continue;
}
}
else if (option == 2)
{
int returnValue = IpRenew((ManagementObject)allDevices[listDescription[option]]);
if (returnValue<2)
{
Console.WriteLine( "成功分配IP" );
Console.Write( "输入上面网卡的数字编号(q：退出)，选择网卡：" );
xInput = Console.ReadLine();
continue;
}
}
else
{
Console.WriteLine( "选择有误" );
Console.Write( "输入上面网卡的数字编号(q：退出)，选择网卡：" );
Console.ReadLine();
continue;
}
}
}
}
}
/// <summary>
/// Function:重新分配指定网卡的IP
/// </summary>
/// <param name="obj">ManagementObject obj --对应网卡的管理对象</param>
/// <returns>返回值，整数，0和1表示成功</returns>
public static int IpRenew(ManagementObject obj)
{
ManagementBaseObject utPar = null;
utPar = obj.InvokeMethod( "RenewDHCPLease" , null, null);
return Convert.ToInt32(outPar[ "returnValue" ]);
}
/// <summary>
/// Function:释放指定网卡IP
/// </summary>
/// <param name="obj">ManagementObject obj--对应网卡的管理对象</param>
/// <returns>返回值，整数，0和1表示成功</returns>
public static int IpRelease(ManagementObject obj)
{
ManagementBaseObject utPar = null;
utPar = obj.InvokeMethod( "ReleaseDHCPLease" , null, null);
return Convert.ToInt32(outPar[ "returnValue" ] );
}
}
}