IPAddress,IPEndPoint,IPHostEntry介绍

IPAddress,IPEndPoint,IPHostEntry位于命名空间System.Net下，提供对IP地址的操作

IPAddress是.NET封装的IP地址类

 

常用方法：

1、IPAddress.Parse()

public static IPAddress Parse (string ipString)，这个方法得目的就是将一个ipString转换成为IPAddress类型。

2、IPAddress.Loopback、IPAddress.Broadcast、IPAddress.Any、IPAddress.None都是IPAddress得几个域成员，它们得返回值类型都是IPAddress

 

class IPAddressSample
{
    public static void Main()
    {
        //创建5个IPAddress对象，并赋值
        IPAddress newaddress1 = IPAddress.Parse("192.168.1.1");//把192.168.1.1转换为IPAddress
        IPAddress newaddress2 = IPAddress.Loopback;//本地环回地址
        IPAddress newaddress3 = IPAddress.Broadcast;//广播地址
        IPAddress newaddress4 = IPAddress.Any;
        IPAddress newaddress5 = IPAddress.None;

        /*用System.net.dns类中的GetHostEntry()和GetHostName()方法来建立一个本
        地IP地址，并且建立了一个IPHostEntry对象。用以下两句代码来获取本地IP
        地址*/

        IPHostEntry here = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress localaddress = here.AddressList[0];

        //判断newaddress2地址是否为环回地址
        if (IPAddress.IsLoopback(newaddress2))
            Console.WriteLine("The Loopback address is: {0}", newaddress2.ToString());
        else
            Console.WriteLine("Error obtaining the loopback address");

        //打印本地IP地址
        Console.WriteLine("The Local IP address is: {0}\n", localaddress.ToString());

        //判断本地IP地址是否为环回地址
        if (localaddress == newaddress2)
            Console.WriteLine("The loopback address is the same as local address.\n");
        else
            Console.WriteLine("The loopback address is not the local address.\n");

        //打印其他IP地址
        Console.WriteLine("The test address is: {0}", newaddress1.ToString());
        Console.WriteLine("Broadcast address: {0}", newaddress3.ToString());
        Console.WriteLine("The ANY address is: {0}", newaddress4.ToString());
        Console.WriteLine("The NONE address is: {0}", newaddress5.ToString());

        //用console.readling()使程序在执行完上述代码后不立即退出，在用户输入回车键之后退出程序

        Console.ReadLine();
    }

 

IPEndPoint代表网络端点的IP地址和端口号

实例化IPEndPoint

 IPAddress newaddress = IPAddress.Parse("192.168.1.1");

 IPEndPoint ex = new IPEndPoint(newaddress,8000); //创建IPEndPoint实例

常用属性和方法

 

ex.Address返回IpEndPoint实例的IP地址

ex.Port返回IpEndPoint实例的端口

class IPEndPointSample
{
    public static void Main()
    {
        IPAddress newaddress = IPAddress.Parse("192.168.1.1");
        //创建IPEndPoint实例
        IPEndPoint ex = new IPEndPoint(newaddress,8000);
        Console.WriteLine("The IPEndPoint is:{0}", ex.ToString());
        Console.WriteLine("The AddressFamily is:{0}", ex.AddressFamily);
        Console.WriteLine("The Address is:{0},and the port is:{1}", ex.Address, ex.Port);
        Console.WriteLine("The Min Port Number is:{0}", IPEndPoint.MinPort);
        Console.WriteLine("The Max Port Number is:{0}", IPEndPoint.MaxPort);
        //用port属性单独改变IPEndPoint对象的端口值
        ex.Port = 80;
        Console.WriteLine("The changed IPEndPoint vaule is:{0}", ex.ToString());
        //存储IPEdnPoint实例
        SocketAddress sa = ex.Serialize();
        Console.WriteLine("The Socketaddress is:{0}", sa.ToString());
        Console.ReadLine();
    }
}

 

IPHostEntry代表某一IP的实体

 

class IPHostEntryClassSample
{
    public static void Main(string[] argv)
    {
        IPHostEntry results = Dns.GetHostEntry(IPAddress.Parse("127.0.0.1"));
        Console.WriteLine("Host name: {0}", results.HostName);
        foreach (string alias in results.Aliases)
        {
            Console.WriteLine("Alias: {0}", alias);
        }
        foreach (IPAddress address in results.AddressList)
        {
            Console.WriteLine("Address: {0}", address.ToString());
        }
    }
}

 

实例下载：

IPAddressSample

IPEndPointSample

IPHostEntrySample

 

 

 

class IPAddressSample

{

    public static void Main()

    {

        //创建5个IPAddress对象，并赋值

        IPAddress newaddress1 = IPAddress.Parse("192.168.1.1");//把192.168.1.1转换为IPAddress

        IPAddress newaddress2 = IPAddress.Loopback;//本地环回地址

        IPAddress newaddress3 = IPAddress.Broadcast;//广播地址

        IPAddress newaddress4 = IPAddress.Any;

        IPAddress newaddress5 = IPAddress.None;

        /*用System.net.dns类中的GetHostEntry()和GetHostName()方法来建立一个本

        地IP地址，并且建立了一个IPHostEntry对象。用以下两句代码来获取本地IP

        地址*/

        IPHostEntry here = Dns.GetHostEntry(Dns.GetHostName());

        IPAddress localaddress = here.AddressList[0];

        //判断newaddress2地址是否为环回地址

        if (IPAddress.IsLoopback(newaddress2))

            Console.WriteLine("The Loopback address is: {0}", newaddress2.ToString());

        else

            Console.WriteLine("Error obtaining the loopback address");

        //打印本地IP地址

        Console.WriteLine("The Local IP address is: {0}\n", localaddress.ToString());

        //判断本地IP地址是否为环回地址

        if (localaddress == newaddress2)

            Console.WriteLine("The loopback address is the same as local address.\n");

        else

            Console.WriteLine("The loopback address is not the local address.\n");

        //打印其他IP地址

        Console.WriteLine("The test address is: {0}", newaddress1.ToString());

        Console.WriteLine("Broadcast address: {0}", newaddress3.ToString());

        Console.WriteLine("The ANY address is: {0}", newaddress4.ToString());

        Console.WriteLine("The NONE address is: {0}", newaddress5.ToString());

        //用console.readling()使程序在执行完上述代码后不立即退出，在用户输入回车键之后退出程序

        Console.ReadLine();

    }

class IPAddressSample
{
    public static void Main()
    {
        //创建5个IPAddress对象，并赋值
        IPAddress newaddress1 = IPAddress.Parse("192.168.1.1");//把192.168.1.1转换为IPAddress
        IPAddress newaddress2 = IPAddress.Loopback;//本地环回地址
        IPAddress newaddress3 = IPAddress.Broadcast;//广播地址
        IPAddress newaddress4 = IPAddress.Any;
        IPAddress newaddress5 = IPAddress.None;

        /*用System.net.dns类中的GetHostEntry()和GetHostName()方法来建立一个本
        地IP地址，并且建立了一个IPHostEntry对象。用以下两句代码来获取本地IP
        地址*/

        IPHostEntry here = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress localaddress = here.AddressList[0];

        //判断newaddress2地址是否为环回地址
        if (IPAddress.IsLoopback(newaddress2))
            Console.WriteLine("The Loopback address is: {0}", newaddress2.ToString());
        else
            Console.WriteLine("Error obtaining the loopback address");

        //打印本地IP地址
        Console.WriteLine("The Local IP address is: {0}\n", localaddress.ToString());

        //判断本地IP地址是否为环回地址
        if (localaddress == newaddress2)
            Console.WriteLine("The loopback address is the same as local address.\n");
        else
            Console.WriteLine("The loopback address is not the local address.\n");

        //打印其他IP地址
        Console.WriteLine("The test address is: {0}", newaddress1.ToString());
        Console.WriteLine("Broadcast address: {0}", newaddress3.ToString());
        Console.WriteLine("The ANY address is: {0}", newaddress4.ToString());
        Console.WriteLine("The NONE address is: {0}", newaddress5.ToString());

        //用console.readling()使程序在执行完上述代码后不立即退出，在用户输入回车键之后退出程序

        Console.ReadLine();
    }