C#获取本机IP搜集整理7种方法

今天打算试着写个小聊天程序，但是要用到获取本机IP，以前从没用过，就收集了种获取本机IP的方法，备用。

①

        private void GetIP()
        {
            string hostName = Dns.GetHostName();//本机名
            //System.Net.IPAddress[] addressList = Dns.GetHostByName(hostName).AddressList;//会警告GetHostByName()已过期，我运行时且只返回了一个IPv4的地址
            System.Net.IPAddress[] addressList = Dns.GetHostAddresses(hostName);//会返回所有地址，包括IPv4和IPv6
            foreach (IPAddress ip in addressList)
            {
                listBox1.Items.Add(ip.ToString());
            }
        }

②使用IPHostEntry获取本机局域网地址

        static string GetLocalIp()
        {
            string hostname = Dns.GetHostName();//得到本机名
            //IPHostEntry localhost = Dns.GetHostByName(hostname);//方法已过期，只得到IPv4的地址
    IPHostEntry localhost = Dns.GetHostEntry(hostname);
            IPAddress localaddr = localhost.AddressList[0];
            return localaddr.ToString();
        }

③获取本机网络ip地址

方法时通过向网站向一些提供IP查询的网站发送webrequest，然后分析返回的数据流

       string strUrl = "提供IP查询的网站的链接";
       Uri uri = new Uri(strUrl);
       WebRequest webreq = WebRequest.Create(uri);
       Stream s = webreq .GetResponse().GetResponseStream();
       StreamReader sr = new StreamReader(s, Encoding.Default);
       string all = sr.ReadToEnd(); 
       int i = all.IndexOf("[") + 1;
       //分析字符串得到IP
       return ip;
       /*
        我用的是http://www.ip.cn/getip.php?action=getip&ip_url=&from=web   
        (这种链接很容易找的，百度“IP”得到一些网站，分析一下网站的链接就能得到)
        返回的数据是： 
        <div class="well"><p>当前 IP：<code>0.0.0.0</code> 来自：XX省XX市 电信</p><p>GeoIP: Beijing, China</p></div> 
        解析这段就行 
      */

④//由于用到了ManagementClass、ManagementObjectCollection；必须添加引用System.Management.dll及using System.Management;

        private void GetIP2()
        {
            string stringMAC = "";
            string stringIP = "";
            ManagementClass managementClass = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection managementObjectCollection = managementClass.GetInstances();
            foreach(ManagementObject managementObject in managementObjectCollection)
            {
                if ((bool)managementObject["IPEnabled"] == true)
                {
                    stringMAC += managementObject["MACAddress"].ToString();
                    string[] IPAddresses = (string[])managementObject["IPAddress"];
                    if (IPAddresses.Length > 0)
                    {
                        stringIP = IPAddresses[0]; 
                    }
                }
            }
            txtMAC.Text = stringMAC.ToString();
            txtIP.Text = stringIP.ToString();
        }

⑤调用一个网站提供的Web服务来查询IP网址：http://www.webxml.com.cn/zh_cn/web_services.aspx服务：http://webservice.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx

弄了好半天，但是没学会怎样调用Web Service，按照搜到的页面做也不行，遂先放弃吧.....毕竟还未接触到WebService，改天把WebService搞定再来一定就容易了（留待以后完善吧）

⑥通过获取CMD里ipconfig命令的结果来得到IP  

private void GetIP6()
        {
            Process cmd = new Process();
            cmd.StartInfo.FileName = "ipconfig.exe";//设置程序名
            cmd.StartInfo.Arguments = "/all";  //参数
	    //重定向标准输出
            cmd.StartInfo.RedirectStandardOutput = true;
            cmd.StartInfo.RedirectStandardInput = true;
            cmd.StartInfo.UseShellExecute = false;
            cmd.StartInfo.CreateNoWindow = true;//不显示窗口（控制台程序是黑屏）
	    //cmd.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;//暂时不明白什么意思
            /*
	    收集一下 有备无患
            关于:ProcessWindowStyle.Hidden隐藏后如何再显示？
            hwndWin32Host = Win32Native.FindWindow(null, win32Exinfo.windowsName);
            Win32Native.ShowWindow(hwndWin32Host, 1);	 //先FindWindow找到窗口后再ShowWindow
            */
            cmd.Start();
            string info = cmd.StandardOutput.ReadToEnd();
            cmd.WaitForExit();
            cmd.Close();
            textBox1.AppendText(info);
        }

⑦NetworkInformation

        private void GetIP5()
        {
	    //需要的命名空间
            //using System.Net.NetworkInformation;
            //using System.Net.Sockets;
            string str = "";
            NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
            int i = 0;
            foreach (NetworkInterface adapter in adapters)
            {

                IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
                UnicastIPAddressInformationCollection allAddress =
                                                                                        adapterProperties.UnicastAddresses;
                if (allAddress.Count > 0)
                {
                    str += "interface   " + i + "description:\n\t " + adapter.Description + "\n ";
                    i++;
                    foreach (UnicastIPAddressInformation addr in allAddress)
                    {
                        if (addr.Address.AddressFamily == AddressFamily.InterNetworkV6)
                        {
                            ipListComb.Items.Add(addr.Address);
                        }
                        if (addr.Address.AddressFamily == AddressFamily.InterNetwork)
                        {
                            comboBox1.Items.Add(addr.Address);
                        }

                    }
                }
            }
            MessageBox.Show(str);
        }