C#实现一键换IP、重置DNS、网关及掩码的方法

本文实例实现了C#一键换IP、重置DNS、网关及掩码的功能，具体实现的功能为在程序界面窗口中设置ip地址和子网掩码，设置网关地址，设置DNS，并且在设置过程中程序将判断如果没有启用IP设置的网络设备则跳过，重置DNS为空，并开启DHCP。

主要功能代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Management;
namespace changeIP
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
ManagementBaseObject inPar = null;
ManagementBaseObject outPar = null;
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
if (!(bool)mo["IPEnabled"])
continue;
//设置ip地址和子网掩码
inPar = mo.GetMethodParameters("EnableStatic");
string ip = "";
ip = numericUpDown1.Value.ToString() + "." + numericUpDown2.Value.ToString() + "." + numericUpDown3.Value.ToString() + "." + numericUpDown4.Value.ToString();
inPar["IPAddress"] = new string[] { ip };// 1.备用 2.IP
string ym = "";
ym = numericUpDown8.Value.ToString() + "." + numericUpDown7.Value.ToString() + "." + numericUpDown6.Value.ToString() + "." + numericUpDown5.Value.ToString();
inPar["SubnetMask"] = new string[] { ym };
outPar = mo.InvokeMethod("EnableStatic", inPar, null);
//设置网关地址
inPar = mo.GetMethodParameters("SetGateways");
string wg = "";
wg = numericUpDown12.Value.ToString() + "." + numericUpDown11.Value.ToString() + "." + numericUpDown10.Value.ToString() + "." + numericUpDown9.Value.ToString();
inPar["DefaultIPGateway"] = new string[] { wg }; // 1.网关;2.备用网关
outPar = mo.InvokeMethod("SetGateways", inPar, null);
//设置DNS
inPar = mo.GetMethodParameters("SetDNSServerSearchOrder");
string dns1 = numericUpDown16.Value.ToString() + "." + numericUpDown15.Value.ToString() + "." + numericUpDown14.Value.ToString() + "." + numericUpDown13.Value.ToString();
string dns2 = numericUpDown20.Value.ToString() + "." + numericUpDown19.Value.ToString() + "." + numericUpDown18.Value.ToString() + "." + numericUpDown17.Value.ToString();
inPar["DNSServerSearchOrder"] = new string[] { dns1, dns2 }; // 1.DNS 2.备用DNS
outPar = mo.InvokeMethod("SetDNSServerSearchOrder", inPar, null);
break;
}
}
private void button2_Click(object sender, EventArgs e)
{
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);
}
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
this.Dispose();
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.F2:
button1_Click(sender, e);
break;
case Keys.F3:
button2_Click(sender, e);
break;
}
}
}
}

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