【转载】c# 获取本地主机的ip地址四种方法

1. 获取本机IP地址四种方法

第一种取本机IP地址：

public string GetLocalIp()
       {
           ///获取本地的IP地址
           string AddressIP = string.Empty;
           foreach (IPAddress _IPAddress in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
           {
               if (_IPAddress.AddressFamily.ToString() == "InterNetwork")
               {
                   AddressIP = _IPAddress.ToString();
               }
           }
           return AddressIP;
       }　

第二种取本机IP地址：

/// <summary>
/// 取本机主机ip
/// </summary>
/// <returns></returns>
public static string GetLocalIP()
{
    try
    {
         
        string HostName = Dns.GetHostName(); //得到主机名
        IPHostEntry IpEntry = Dns.GetHostEntry(HostName);
        for (int i = 0; i < IpEntry.AddressList.Length; i++)
        {
            //从IP地址列表中筛选出IPv4类型的IP地址
            //AddressFamily.InterNetwork表示此IP为IPv4,
            //AddressFamily.InterNetworkV6表示此地址为IPv6类型
            if (IpEntry.AddressList[i].AddressFamily == AddressFamily.InterNetwork)
            {
                string ip = "";
                ip = IpEntry.AddressList[i].ToString();
                return IpEntry.AddressList[i].ToString();
            }
        }
        return "";
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
}

第三种取本机IP地址:

1 2	`public` `static` `string` `GetIp {` `get; } = Dns.GetHostEntry(Dns.GetHostName()).` `AddressList.FirstOrDefault(p => p.AddressFamily.ToString() ==` `"InterNetwork")?.ToString();`

第四种通过访问的网址来取IP:

public static string GetIP()
       {
           using (var webClient = new WebClient())
           {
               try
               {
                   var temp = webClient.DownloadString("http://localhost:1234/WeatherWebForm.aspx");//一般指定网址
                   var ip = Regex.Match(temp, @"\[(?<ip>\d+\.\d+\.\d+\.\d+)]").Groups["ip"].Value;
                   return !string.IsNullOrEmpty(ip) ? ip : null;
               }
               catch (Exception ex)
               {
                   return ex.Message;
               }
           }
       }