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

 

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01 class IPAddressSample
02 {
03     public static void Main()
04     {
05         //创建5个IPAddress对象，并赋值
06         IPAddress newaddress1 = IPAddress.Parse("192.168.1.1");//把192.168.1.1转换为IPAddress
07         IPAddress newaddress2 = IPAddress.Loopback;//本地环回地址
08         IPAddress newaddress3 = IPAddress.Broadcast;//广播地址
09         IPAddress newaddress4 = IPAddress.Any;
10         IPAddress newaddress5 = IPAddress.None;
11   
12         /*用System.net.dns类中的GetHostEntry()和GetHostName()方法来建立一个本
13         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
14         地址*/
15   
16         IPHostEntry here = Dns.GetHostEntry(Dns.GetHostName());
17         IPAddress localaddress = here.AddressList[0];
18   
19         //判断newaddress2地址是否为环回地址
20         if (IPAddress.IsLoopback(newaddress2))
21             Console.WriteLine("The Loopback address is: {0}", newaddress2.ToString());
22         else
23             Console.WriteLine("Error obtaining the loopback address");
24   
25         //打印本地IP地址
26         Console.WriteLine("The Local IP address is: {0}\n", localaddress.ToString());
27   
28         //判断本地IP地址是否为环回地址
29         if (localaddress == newaddress2)
30             Console.WriteLine("The loopback address is the same as local address.\n");
31         else
32             Console.WriteLine("The loopback address is not the local address.\n");
33   
34         //打印其他IP地址
35         Console.WriteLine("The test address is: {0}", newaddress1.ToString());
36         Console.WriteLine("Broadcast address: {0}", newaddress3.ToString());
37         Console.WriteLine("The ANY address is: {0}", newaddress4.ToString());
38         Console.WriteLine("The NONE address is: {0}", newaddress5.ToString());
39   
40         //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
41   
42         Console.ReadLine();
43     }

 

IPEndPoint代表网络端点的IP地址和端口号

实例化IPEndPoint

 

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1 IPAddress newaddress = IPAddress.Parse("192.168.1.1");
2  
3 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

 

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01 class IPEndPointSample
02 {
03     public static void Main()
04     {
05         IPAddress newaddress = IPAddress.Parse("192.168.1.1");
06         //创建IPEndPoint实例
07         IPEndPoint ex = new IPEndPoint(newaddress,8000);
08         Console.WriteLine("The IPEndPoint is:{0}", ex.ToString());
09         Console.WriteLine("The AddressFamily is:{0}", ex.AddressFamily);
10         Console.WriteLine("The Address is:{0},and the port is:{1}", ex.Address, ex.Port);
11         Console.WriteLine("The Min Port Number is:{0}", IPEndPoint.MinPort);
12         Console.WriteLine("The Max Port Number is:{0}", IPEndPoint.MaxPort);
13         //用port属性单独改变IPEndPoint对象的端口值
14         ex.Port = 80;
15         Console.WriteLine("The changed IPEndPoint vaule is:{0}", ex.ToString());
16         //存储IPEdnPoint实例
17         SocketAddress sa = ex.Serialize();
18         Console.WriteLine("The Socketaddress is:{0}", sa.ToString());
19         Console.ReadLine();
20     }
21 }

 

IPHostEntry代表某一IP的实体

 

view source
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01 class IPHostEntryClassSample
02 {
03     public static void Main(string[] argv)
04     {
05         IPHostEntry results = Dns.GetHostEntry(IPAddress.Parse("127.0.0.1"));
06         Console.WriteLine("Host name: {0}", results.HostName);
07         foreach (string alias in results.Aliases)
08         {
09             Console.WriteLine("Alias: {0}", alias);
10         }
11         foreach (IPAddress address in results.AddressList)
12         {
13             Console.WriteLine("Address: {0}", address.ToString());
14         }
15     }
16 }

posted on 2010-11-22 14:31  shitoudong  阅读(783)  评论(0)  编辑  收藏  举报

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