using System;
using System.Collections.Generic;
using System.Text;
using System;
using System.Collections;
using System.Text;
using System.Management;
using System.Text.RegularExpressions;


namespace Demo
{
/// <summary>
/// 网络设置类，设置网络的各种参数（DNS、网关、子网掩码、IP）
/// </summary>
public class NetworkSetting
{
public NetworkSetting()
{
// 构造函数逻辑
}

/// <summary>
/// 设置DNS
/// </summary>
/// <param name="dns"></param>
public static void SetDNS(string[] dns)
{
SetIPAddress(null, null, null, dns);
}
/// <summary>
/// 设置网关
/// </summary>
/// <param name="getway"></param>
public static void SetGetWay(string getway)
{
SetIPAddress(null, null, new string[] { getway }, null);
}
/// <summary>
/// 设置网关
/// </summary>
/// <param name="getway"></param>
public static void SetGetWay(string[] getway)
{
SetIPAddress(null, null, getway, null);
}
/// <summary>
/// 设置IP地址和掩码
/// </summary>
/// <param name="ip"></param>
/// <param name="submask"></param>
public static void SetIPAddress(string ip, string submask)
{
SetIPAddress(new string[] { ip }, new string[] { submask }, null, null);
}
/// <summary>
/// 设置IP地址，掩码和网关
/// </summary>
/// <param name="ip"></param>
/// <param name="submask"></param>
/// <param name="getway"></param>
public static void SetIPAddress(string ip, string submask, string getway)
{
SetIPAddress(new string[] { ip }, new string[] { submask }, new string[] { getway }, null);
}
/// <summary>
/// 设置IP地址，掩码，网关和DNS
/// </summary>
/// <param name="ip"></param>
/// <param name="submask"></param>
/// <param name="getway"></param>
/// <param name="dns"></param>
public static void SetIPAddress(string[] ip, string[] submask, string[] getway, string[] dns)
{
ManagementClass wmi = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = wmi.GetInstances();
ManagementBaseObject inPar = null;
ManagementBaseObject outPar = null;
foreach (ManagementObject mo in moc)
{
//如果没有启用IP设置的网络设备则跳过
if (!(bool) mo["IPEnabled"])
continue;

//设置IP地址和掩码
if (ip != null && submask != null)
{
inPar = mo.GetMethodParameters("EnableStatic");
inPar["IPAddress"] = ip;
inPar["SubnetMask"] = submask;
outPar = mo.InvokeMethod("EnableStatic", inPar, null);
}

//设置网关地址
if (getway != null)
{
inPar = mo.GetMethodParameters("SetGateways");
inPar["DefaultIPGateway"] = getway;
outPar = mo.InvokeMethod("SetGateways", inPar, null);
}

//设置DNS地址
if (dns != null)
{
inPar = mo.GetMethodParameters("SetDNSServerSearchOrder");
inPar["DNSServerSearchOrder"] = dns;
outPar = mo.InvokeMethod("SetDNSServerSearchOrder", inPar, null);
}
}
}

/// <summary>
/// 启用DHCP服务器
/// </summary>
public static void EnableDHCP()
{
ManagementClass wmi = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = wmi.GetInstances();
foreach (ManagementObject mo in moc)
{
//如果没有启用IP设置的网络设备则跳过
if (!(bool) mo["IPEnabled"])
continue;
//重置DNS为空
mo.InvokeMethod("SetDNSServerSearchOrder", null);
//开启DHCP
mo.InvokeMethod("EnableDHCP", null);
}
}

/// <summary>
/// 判断是否符合IP地址格式
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static bool IsIPAddress(string ip)
{
//将完整的IP以“.”为界限分组
string[] arr = ip.Split('.');


//判断IP是否为四组数组成
if (arr.Length != 4)
return false;


//正则表达式，1~3位整数
string pattern = @"\d{1,3}";
for (int i = 0; i < arr.Length; i++)
{
string d = arr[i];


//判断IP开头是否为0
if (i == 0 && d == "0")
return false;


//判断IP是否是由1~3位数组成
if (!Regex.IsMatch(d, pattern))
return false;

if (d != "0")
{
//判断IP的每组数是否全为0
d = d.TrimStart('0');
if (d == "")
return false;

//判断IP每组数是否大于255
if (int.Parse(d) > 255)
return false;
}
} return true;
}
}
}