C#获取本机IPv4和IPv6地址

这个要引入命名空间

using System.Net;

using System.Net.Sockets;

因为AddressFamily枚举类型在这个命名空间中。

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)
			{
				return IpEntry.AddressList[i].ToString();
			}
		}
		return "";
	}
	catch (Exception ex)
	{
		MessageBox.Show("获取本机IP出错:" + ex.Message);
		return "";
	}
}