我正在运行服务器，我想显示自己的IP地址。
获取计算机自身（如果可能的话，外部）IP地址的语法是什么？
有人写了以下代码。
IPHostEntry host;
string localIP = "?";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily.ToString() == "InterNetwork")
{
localIP = ip.ToString();
}
}
return localIP;
但是，我一般不信任作者，我不明白这段代码。有没有更好的方法呢？
答案 0 :(得分：234)
不，这几乎是最好的方法。由于机器可能有多个IP地址，您需要迭代它们的集合以找到合适的IP地址。
编辑：
if (ip.AddressFamily.ToString() == "InterNetwork")
到此：
if (ip.AddressFamily == AddressFamily.InterNetwork)
无需ToString枚举进行比较。
答案 1 :(得分：163)
了解您的公共知识产权的唯一方法是请别人告诉您;这段代码可以帮到你：
public string GetPublicIP()
{
String direction = "";
WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
using (WebResponse response = request.GetResponse())
using (StreamReader stream = new StreamReader(response.GetResponseStream()))
{
direction = stream.ReadToEnd();
}
//Search for the ip in the html
int first = direction.IndexOf("Address: ") + 9;
int last = direction.LastIndexOf("</body>");
direction = direction.Substring(first, last - first);
return direction;
}
答案 2 :(得分：81)
清洁工和一体化解决方案：D
//This returns the first IP4 address or null
return Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(ip => ip.AddressFamily == AddressFamily.InterNetwork);
答案 3 :(得分：50)
如果您不能依赖从DNS服务器获取您的IP地址（我遇到过这种情况），您可以使用以下方法：
System.Net.NetworkInformation命名空间包含NetworkInterface class，其中包含静态GetAllNetworkInterfaces method。
此方法将返回您计算机上的所有“网络接口”，即使您的计算机上只安装了无线适配器和/或以太网适配器硬件，也通常会有很多“网络接口”。所有这些网络接口都具有本地计算机的有效IP地址，尽管您可能只需要一个。
如果您正在寻找一个IP地址，那么您需要过滤列表，直到您找到正确的地址。您可能需要做一些实验，但我使用以下方法取得了成功：
OperationalStatus == OperationalStatus.Up过滤掉所有处于非活动状态的NetworkInterface。例如，如果您没有插入网络电缆，这将排除您的物理以太网适配器。对于每个NetworkInterface，您可以使用IPInterfaceProperties获取GetIPProperties method对象，并且可以从IPInterfaceProperties对象访问UnicastAddresses property以获取UnicastIPAddressInformation个对象的列表。
DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred AddressPreferredLifetime != UInt32.MaxValue。此时我将获取与所有这些过滤器匹配的第一个（如果有）单播地址的地址。
[修订后的代码于2018年5月16日，包含上述文本中提到的重复地址检测状态和首选生命周期的条件]
下面的示例演示了基于操作状态，地址族的过滤，不包括环回地址（127.0.0.1），重复地址检测状态和首选生命周期。
static IEnumerable<IPAddress> GetLocalIpAddresses()
{
// Get the list of network interfaces for the local computer.
var adapters = NetworkInterface.GetAllNetworkInterfaces();
// Return the list of local IPv4 addresses excluding the local
// host, disconnected, and virtual addresses.
return (from adapter in adapters
let properties = adapter.GetIPProperties()
from address in properties.UnicastAddresses
where adapter.OperationalStatus == OperationalStatus.Up &&
address.Address.AddressFamily == AddressFamily.InterNetwork &&
!address.Equals(IPAddress.Loopback) &&
address.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred &&
address.AddressPreferredLifetime != UInt32.MaxValue
select address.Address);
}
答案 4 :(得分：37)
WebClient webClient = new WebClient();
string IP = webClient.DownloadString("http://myip.ozymo.com/");
答案 5 :(得分：17)
using System.Net;
string host = Dns.GetHostName();
IPHostEntry ip = Dns.GetHostEntry(host);
Console.WriteLine(ip.AddressList[0].ToString());
刚刚在我的机器上进行了测试，它确实有效。
答案 6 :(得分：15)
如果您想避免使用DNS：
List<IPAddress> ipList = new List<IPAddress>();
foreach (var netInterface in NetworkInterface.GetAllNetworkInterfaces())
{
foreach (var address in netInterface.GetIPProperties().UnicastAddresses)
{
if (address.Address.AddressFamily == AddressFamily.InterNetwork)
{
Console.WriteLine("found IP " + address.Address.ToString());
ipList.Add(address.Address);
}
}
}
答案 7 :(得分：9)
不要一直依赖InterNetwork，因为你可以拥有多个同时使用IP4的设备，这会破坏获取IP的结果。 现在，如果您愿意，可以复制此内容，请查看或更新为您认为合适的方式。
首先我得到路由器的地址（网关） 如果它返回我连接到网关（这意味着没有直接连接到调制解调器无线），那么我们的网关地址为IPAddress，否则我们是空指针IPAddress引用。
然后我们需要获取计算机的IP地址列表。事情并不困难，因为路由器（所有路由器）使用4个字节（...）。前三个是最重要的，因为连接到它的任何计算机将具有与前三个字节匹配的IP4地址。例如：192.168.0.1是路由器默认IP的标准，除非由管理员更改。 '192.168.0'或者它们可能是我们需要匹配的东西。这就是我在IsAddressOfGateway函数中所做的一切。 长度匹配的原因是因为并非所有地址（仅用于计算机）都具有4个字节的长度。如果在cmd中键入netstat，您会发现这是真的。所以你有它。是的，真正得到你想要的东西需要更多的工作。排除法。 并且为了上帝的缘故，不要通过ping它来找到地址，这需要花费时间，因为首先你要发送要被ping的地址，然后它必须发回结果。不，直接使用.Net类来处理您的系统环境，当您必须单独使用计算机时，您将获得所需的答案。
现在，如果您直接连接到调制解调器，过程几乎相同，因为调制解调器是您的网关，但子掩码不一样，因为您通过调制解调器直接从DNS服务器获取信息而不是路由器屏蔽虽然您仍然可以使用相同的代码，因为分配给调制解调器的IP的最后一个字节是1.因此，如果从调制解调器发送的IP确实发生变化是111.111.111.1'那么您将得到111.111.111 。（某个字节值）。请记住，我们需要找到网关信息，因为有更多的设备处理互联网连接而不是路由器和调制解调器。
现在你明白为什么你不要改变你的路由器的前两个字节192和168.这些只是严格区分路由器而不是互联网使用或我们会遇到严重的IP协议和双重ping问题导致计算机崩溃。您分配的路由器IP为192.168.44.103的图像，并且您也单击具有该IP的站点。我的天啊！您的计算机不知道要ping什么。崩溃就在那里。为避免此问题，仅为路由器分配这些，而不是用于Internet使用。所以留下路由器的前两个字节。
static IPAddress FindLanAddress()
{
IPAddress gateway = FindGetGatewayAddress();
if (gateway == null)
return null;
IPAddress[] pIPAddress = Dns.GetHostAddresses(Dns.GetHostName());
foreach (IPAddress address in pIPAddress) {
if (IsAddressOfGateway(address, gateway))
return address;
return null;
}
static bool IsAddressOfGateway(IPAddress address, IPAddress gateway)
{
if (address != null && gateway != null)
return IsAddressOfGateway(address.GetAddressBytes(),gateway.GetAddressBytes());
return false;
}
static bool IsAddressOfGateway(byte[] address, byte[] gateway)
{
if (address != null && gateway != null)
{
int gwLen = gateway.Length;
if (gwLen > 0)
{
if (address.Length == gateway.Length)
{
--gwLen;
int counter = 0;
for (int i = 0; i < gwLen; i++)
{
if (address[i] == gateway[i])
++counter;
}
return (counter == gwLen);
}
}
}
return false;
}
static IPAddress FindGetGatewayAddress()
{
IPGlobalProperties ipGlobProps = IPGlobalProperties.GetIPGlobalProperties();
foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
{
IPInterfaceProperties ipInfProps = ni.GetIPProperties();
foreach (GatewayIPAddressInformation gi in ipInfProps.GatewayAddresses)
return gi.Address;
}
return null;
}
答案 8 :(得分：8)
我只是认为我会添加自己的单行（即使已经有许多其他有用的答案）。
string ipAddress = new WebClient().DownloadString("http://icanhazip.com");
答案 9 :(得分：4)
要获取当前的公共IP地址，您需要做的就是在页面加载事件中创建一个带有以下行的ASPX页面：
Response.Write(HttpContext.Current.Request.UserHostAddress.ToString());
答案 10 :(得分：4)
如果您在Intranet中运行，您将能够获得本地计算机IP地址，如果没有，您将获得外部IP地址： 网络：
//this will bring the IP for the current machine on browser
System.Web.HttpContext.Current.Request.UserHostAddress
桌面：
//This one will bring all local IPs for the desired namespace
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
答案 11 :(得分：3)
namespace NKUtilities
{
using System;
using System.Net;
using System.Net.Sockets;
public class DNSUtility
{
public static int Main(string [] args)
{
string strHostName = "";
try {
if(args.Length == 0)
{
// Getting Ip address of local machine...
// First get the host name of local machine.
strHostName = Dns.GetHostName();
Console.WriteLine ("Local Machine's Host Name: " + strHostName);
}
else
{
// Otherwise, get the IP address of the host provided on the command line.
strHostName = args[0];
}
// Then using host name, get the IP address list..
IPHostEntry ipEntry = Dns.GetHostEntry (strHostName);
IPAddress [] addr = ipEntry.AddressList;
for(int i = 0; i < addr.Length; i++)
{
Console.WriteLine("IP Address {0}: {1} ", i, addr[i].ToString());
}
return 0;
}
catch(SocketException se)
{
Console.WriteLine("{0} ({1})", se.Message, strHostName);
return -1;
}
catch(Exception ex)
{
Console.WriteLine("Error: {0}.", ex.Message);
return -1;
}
}
}
}
查看here了解详情。
你必须记住你的计算机可以有多个IP（实际上它总是这样） - 所以你要去哪一个。
答案 12 :(得分：2)
试试这个：
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
String MyIp = localIPs[0].ToString();
答案 13 :(得分：1)
使用LINQ获取所有IP地址作为字符串：
using System.Linq;
using System.Net.NetworkInformation;
using System.Net.Sockets;
...
string[] allIpAddresses = NetworkInterface.GetAllNetworkInterfaces()
.SelectMany(c=>c.GetIPProperties().UnicastAddresses
.Where(d=>d.Address.AddressFamily == AddressFamily.InterNetwork)
.Select(d=>d.Address.ToString())
).ToArray();
过滤掉私人场所......
首先，定义扩展方法IsPrivate()：
public static class IPAddressExtensions
{
// Collection of private CIDRs (IpAddress/Mask)
private static Tuple<int, int>[] _privateCidrs = new []{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"}
.Select(c=>Tuple.Create(BitConverter.ToInt32(IPAddress
.Parse(c.Split('/')[0]).GetAddressBytes(), 0)
, IPAddress.HostToNetworkOrder(-1 << (32-int.Parse(c.Split('/')[1])))))
.ToArray();
public static bool IsPrivate(this IPAddress ipAddress)
{
int ip = BitConverter.ToInt32(ipAddress.GetAddressBytes(), 0);
return _privateCidrs.Any(cidr=>(ip & cidr.Item2)==(cidr.Item1 & cidr.Item2));
}
}
...然后用它来过滤私有IP：
string[] publicIpAddresses = NetworkInterface.GetAllNetworkInterfaces()
.SelectMany(c=>c.GetIPProperties().UnicastAddresses
.Where(d=>d.Address.AddressFamily == AddressFamily.InterNetwork
&& !d.Address.IsPrivate() // Filter out private ones
)
.Select(d=>d.Address.ToString())
).ToArray();
答案 14 :(得分：1)
问题并不是说ASP.NET MVC，但我现在就把它留在这里：
Request.UserHostAddress
答案 15 :(得分：1)
它适用于我...并且在大多数情况下（如果不是全部）应该比查询DNS服务器更快。感谢Wily博士的学徒（here）。
// ************************************************************************
/// <summary>
/// Will search for the an active NetworkInterafce that has a Gateway, otherwise
/// it will fallback to try from the DNS which is not safe.
/// </summary>
/// <returns></returns>
public static NetworkInterface GetMainNetworkInterface()
{
List<NetworkInterface> candidates = new List<NetworkInterface>();
if (NetworkInterface.GetIsNetworkAvailable())
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (
NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
candidates.Add(ni);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
// Accoring to our tech, the main NetworkInterface should have a Gateway
// and it should be the ony one with a gateway.
if (candidates.Count > 1)
{
for (int n = candidates.Count - 1; n >= 0; n--)
{
if (candidates[n].GetIPProperties().GatewayAddresses.Count == 0)
{
candidates.RemoveAt(n);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
}
// Fallback to try by getting my ipAdress from the dns
IPAddress myMainIpAdress = null;
IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork) // Get the first IpV4
{
myMainIpAdress = ip;
break;
}
}
if (myMainIpAdress != null)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.Address.Equals(myMainIpAdress))
{
return ni;
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// AddressFamily.InterNetwork = IPv4
/// Thanks to Dr. Wilys Apprentice at
/// http://stackoverflow.com/questions/1069103/how-to-get-the-ip-address-of-the-server-on-which-my-c-sharp-application-is-runni
/// using System.Net.NetworkInformation;
/// </summary>
/// <param name="mac"></param>
/// <param name="addressFamily">AddressFamily.InterNetwork = IPv4, AddressFamily.InterNetworkV6 = IPv6</param>
/// <returns></returns>
public static IPAddress GetIpFromMac(PhysicalAddress mac, AddressFamily addressFamily = AddressFamily.InterNetwork)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.GetPhysicalAddress().Equals(mac))
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred)
{
if (ai.Address.AddressFamily == addressFamily)
{
return ai.Address;
}
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// Return the best guess of main ipAdress. To get it in the form aaa.bbb.ccc.ddd just call
/// '?.ToString() ?? ""' on the result.
/// </summary>
/// <returns></returns>
public static IPAddress GetMyInternetIpAddress()
{
NetworkInterface ni = GetMainNetworkInterface();
IPAddress ipAddress = GetIpFromMac(ni.GetPhysicalAddress());
if (ipAddress == null) // could it be possible ?
{
ipAddress = GetIpFromMac(ni.GetPhysicalAddress(), AddressFamily.InterNetworkV6);
}
return ipAddress;
}
// ******************************************************************
就像参考一样，这是我定义它的完整类代码：
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
namespace TcpMonitor
{
/*
Usage:
var cons = TcpHelper.GetAllTCPConnections();
foreach (TcpHelper.MIB_TCPROW_OWNER_PID c in cons) ...
*/
public class NetHelper
{
[DllImport("iphlpapi.dll", SetLastError = true)]
static extern uint GetExtendedUdpTable(IntPtr pUdpTable, ref int dwOutBufLen, bool sort, int ipVersion, UDP_TABLE_CLASS tblClass, uint reserved = 0);
public enum UDP_TABLE_CLASS
{
UDP_TABLE_BASIC,
UDP_TABLE_OWNER_PID,
UDP_TABLE_OWNER_MODULE
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDPTABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_UDPROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDPROW_OWNER_PID
{
public uint localAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDP6TABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_UDP6ROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDP6ROW_OWNER_PID
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] localAddr;
public uint localScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr, localScopeId); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
}
public static List<MIB_UDPROW_OWNER_PID> GetAllUDPConnections()
{
return GetUDPConnections<MIB_UDPROW_OWNER_PID, MIB_UDPTABLE_OWNER_PID> (AF_INET);
}
public static List<MIB_UDP6ROW_OWNER_PID> GetAllUDPv6Connections()
{
return GetUDPConnections<MIB_UDP6ROW_OWNER_PID, MIB_UDP6TABLE_OWNER_PID>(AF_INET6);
}
private static List<IPR> GetUDPConnections<IPR, IPT>(int ipVersion)//IPR = Row Type, IPT = Table Type
{
List<IPR> result = null;
IPR[] tableRows = null;
int buffSize = 0;
var dwNumEntriesField = typeof(IPT).GetField("dwNumEntries");
// how much memory do we need?
uint ret = GetExtendedUdpTable(IntPtr.Zero, ref buffSize, true, ipVersion, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID);
IntPtr udpTablePtr = Marshal.AllocHGlobal(buffSize);
try
{
ret = GetExtendedUdpTable(udpTablePtr, ref buffSize, true, ipVersion, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID);
if (ret != 0)
return new List<IPR>();
// get the number of entries in the table
IPT table = (IPT)Marshal.PtrToStructure(udpTablePtr, typeof(IPT));
int rowStructSize = Marshal.SizeOf(typeof(IPR));
uint numEntries = (uint)dwNumEntriesField.GetValue(table);
// buffer we will be returning
tableRows = new IPR[numEntries];
IntPtr rowPtr = (IntPtr)((long)udpTablePtr + 4);
for (int i = 0; i < numEntries; i++)
{
IPR tcpRow = (IPR)Marshal.PtrToStructure(rowPtr, typeof(IPR));
tableRows[i] = tcpRow;
rowPtr = (IntPtr)((long)rowPtr + rowStructSize); // next entry
}
}
finally
{
result = tableRows?.ToList() ?? new List<IPR>();
// Free the Memory
Marshal.FreeHGlobal(udpTablePtr);
}
return result;
}
[DllImport("iphlpapi.dll", SetLastError = true)]
static extern uint GetExtendedTcpTable(IntPtr pTcpTable, ref int dwOutBufLen, bool sort, int ipVersion, TCP_TABLE_CLASS tblClass, uint reserved = 0);
public enum MIB_TCP_STATE
{
MIB_TCP_STATE_CLOSED = 1,
MIB_TCP_STATE_LISTEN = 2,
MIB_TCP_STATE_SYN_SENT = 3,
MIB_TCP_STATE_SYN_RCVD = 4,
MIB_TCP_STATE_ESTAB = 5,
MIB_TCP_STATE_FIN_WAIT1 = 6,
MIB_TCP_STATE_FIN_WAIT2 = 7,
MIB_TCP_STATE_CLOSE_WAIT = 8,
MIB_TCP_STATE_CLOSING = 9,
MIB_TCP_STATE_LAST_ACK = 10,
MIB_TCP_STATE_TIME_WAIT = 11,
MIB_TCP_STATE_DELETE_TCB = 12
}
public enum TCP_TABLE_CLASS
{
TCP_TABLE_BASIC_LISTENER,
TCP_TABLE_BASIC_CONNECTIONS,
TCP_TABLE_BASIC_ALL,
TCP_TABLE_OWNER_PID_LISTENER,
TCP_TABLE_OWNER_PID_CONNECTIONS,
TCP_TABLE_OWNER_PID_ALL,
TCP_TABLE_OWNER_MODULE_LISTENER,
TCP_TABLE_OWNER_MODULE_CONNECTIONS,
TCP_TABLE_OWNER_MODULE_ALL
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCPTABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_TCPROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCP6TABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_TCP6ROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCPROW_OWNER_PID
{
public uint state;
public uint localAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint remoteAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] remotePort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr); }
}
public ushort LocalPort
{
get
{
return BitConverter.ToUInt16(new byte[2] { localPort[1], localPort[0] }, 0);
}
}
public IPAddress RemoteAddress
{
get { return new IPAddress(remoteAddr); }
}
public ushort RemotePort
{
get
{
return BitConverter.ToUInt16(new byte[2] { remotePort[1], remotePort[0] }, 0);
}
}
public MIB_TCP_STATE State
{
get { return (MIB_TCP_STATE)state; }
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCP6ROW_OWNER_PID
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] localAddr;
public uint localScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] remoteAddr;
public uint remoteScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] remotePort;
public uint state;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public long LocalScopeId
{
get { return localScopeId; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr, LocalScopeId); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
public long RemoteScopeId
{
get { return remoteScopeId; }
}
public IPAddress RemoteAddress
{
get { return new IPAddress(remoteAddr, RemoteScopeId); }
}
public ushort RemotePort
{
get { return BitConverter.ToUInt16(remotePort.Take(2).Reverse().ToArray(), 0); }
}
public MIB_TCP_STATE State
{
get { return (MIB_TCP_STATE)state; }
}
}
public const int AF_INET = 2; // IP_v4 = System.Net.Sockets.AddressFamily.InterNetwork
public const int AF_INET6 = 23; // IP_v6 = System.Net.Sockets.AddressFamily.InterNetworkV6
public static Task<List<MIB_TCPROW_OWNER_PID>> GetAllTCPConnectionsAsync()
{
return Task.Run(() => GetTCPConnections<MIB_TCPROW_OWNER_PID, MIB_TCPTABLE_OWNER_PID>(AF_INET));
}
public static List<MIB_TCPROW_OWNER_PID> GetAllTCPConnections()
{
return GetTCPConnections<MIB_TCPROW_OWNER_PID, MIB_TCPTABLE_OWNER_PID>(AF_INET);
}
public static Task<List<MIB_TCP6ROW_OWNER_PID>> GetAllTCPv6ConnectionsAsync()
{
return Task.Run(()=>GetTCPConnections<MIB_TCP6ROW_OWNER_PID, MIB_TCP6TABLE_OWNER_PID>(AF_INET6));
}
public static List<MIB_TCP6ROW_OWNER_PID> GetAllTCPv6Connections()
{
return GetTCPConnections<MIB_TCP6ROW_OWNER_PID, MIB_TCP6TABLE_OWNER_PID>(AF_INET6);
}
private static List<IPR> GetTCPConnections<IPR, IPT>(int ipVersion)//IPR = Row Type, IPT = Table Type
{
List<IPR> result = null;
IPR[] tableRows = null;
int buffSize = 0;
var dwNumEntriesField = typeof(IPT).GetField("dwNumEntries");
// how much memory do we need?
uint ret = GetExtendedTcpTable(IntPtr.Zero, ref buffSize, true, ipVersion, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL);
IntPtr tcpTablePtr = Marshal.AllocHGlobal(buffSize);
try
{
ret = GetExtendedTcpTable(tcpTablePtr, ref buffSize, true, ipVersion, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL);
if (ret != 0)
return new List<IPR>();
// get the number of entries in the table
IPT table = (IPT)Marshal.PtrToStructure(tcpTablePtr, typeof(IPT));
int rowStructSize = Marshal.SizeOf(typeof(IPR));
uint numEntries = (uint)dwNumEntriesField.GetValue(table);
// buffer we will be returning
tableRows = new IPR[numEntries];
IntPtr rowPtr = (IntPtr)((long)tcpTablePtr + 4);
for (int i = 0; i < numEntries; i++)
{
IPR tcpRow = (IPR)Marshal.PtrToStructure(rowPtr, typeof(IPR));
tableRows[i] = tcpRow;
rowPtr = (IntPtr)((long)rowPtr + rowStructSize); // next entry
}
}
finally
{
result = tableRows?.ToList() ?? new List<IPR>();
// Free the Memory
Marshal.FreeHGlobal(tcpTablePtr);
}
return result;
}
public static string GetTcpStateName(MIB_TCP_STATE state)
{
switch (state)
{
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSED:
return "Closed";
case MIB_TCP_STATE.MIB_TCP_STATE_LISTEN:
return "Listen";
case MIB_TCP_STATE.MIB_TCP_STATE_SYN_SENT:
return "SynSent";
case MIB_TCP_STATE.MIB_TCP_STATE_SYN_RCVD:
return "SynReceived";
case MIB_TCP_STATE.MIB_TCP_STATE_ESTAB:
return "Established";
case MIB_TCP_STATE.MIB_TCP_STATE_FIN_WAIT1:
return "FinWait 1";
case MIB_TCP_STATE.MIB_TCP_STATE_FIN_WAIT2:
return "FinWait 2";
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSE_WAIT:
return "CloseWait";
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSING:
return "Closing";
case MIB_TCP_STATE.MIB_TCP_STATE_LAST_ACK:
return "LastAck";
case MIB_TCP_STATE.MIB_TCP_STATE_TIME_WAIT:
return "TimeWait";
case MIB_TCP_STATE.MIB_TCP_STATE_DELETE_TCB:
return "DeleteTCB";
default:
return ((int)state).ToString();
}
}
private static readonly ConcurrentDictionary<string, string> DicOfIpToHostName = new ConcurrentDictionary<string, string>();
public const string UnknownHostName = "Unknown";
// ******************************************************************
public static string GetHostName(IPAddress ipAddress)
{
return GetHostName(ipAddress.ToString());
}
// ******************************************************************
public static string GetHostName(string ipAddress)
{
string hostName = null;
if (!DicOfIpToHostName.TryGetValue(ipAddress, out hostName))
{
try
{
if (ipAddress == "0.0.0.0" || ipAddress == "::")
{
hostName = ipAddress;
}
else
{
hostName = Dns.GetHostEntry(ipAddress).HostName;
}
}
catch (Exception ex)
{
Debug.Print(ex.ToString());
hostName = UnknownHostName;
}
DicOfIpToHostName[ipAddress] = hostName;
}
return hostName;
}
// ************************************************************************
/// <summary>
/// Will search for the an active NetworkInterafce that has a Gateway, otherwise
/// it will fallback to try from the DNS which is not safe.
/// </summary>
/// <returns></returns>
public static NetworkInterface GetMainNetworkInterface()
{
List<NetworkInterface> candidates = new List<NetworkInterface>();
if (NetworkInterface.GetIsNetworkAvailable())
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (
NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
candidates.Add(ni);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
// Accoring to our tech, the main NetworkInterface should have a Gateway
// and it should be the ony one with a gateway.
if (candidates.Count > 1)
{
for (int n = candidates.Count - 1; n >= 0; n--)
{
if (candidates[n].GetIPProperties().GatewayAddresses.Count == 0)
{
candidates.RemoveAt(n);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
}
// Fallback to try by getting my ipAdress from the dns
IPAddress myMainIpAdress = null;
IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork) // Get the first IpV4
{
myMainIpAdress = ip;
break;
}
}
if (myMainIpAdress != null)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.Address.Equals(myMainIpAdress))
{
return ni;
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// AddressFamily.InterNetwork = IPv4
/// Thanks to Dr. Wilys Apprentice at
/// http://stackoverflow.com/questions/1069103/how-to-get-the-ip-address-of-the-server-on-which-my-c-sharp-application-is-runni
/// using System.Net.NetworkInformation;
/// </summary>
/// <param name="mac"></param>
/// <param name="addressFamily">AddressFamily.InterNetwork = IPv4, AddressFamily.InterNetworkV6 = IPv6</param>
/// <returns></returns>
public static IPAddress GetIpFromMac(PhysicalAddress mac, AddressFamily addressFamily = AddressFamily.InterNetwork)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.GetPhysicalAddress().Equals(mac))
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred)
{
if (ai.Address.AddressFamily == addressFamily)
{
return ai.Address;
}
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// Return the best guess of main ipAdress. To get it in the form aaa.bbb.ccc.ddd just call
/// '?.ToString() ?? ""' on the result.
/// </summary>
/// <returns></returns>
public static IPAddress GetMyInternetIpAddress()
{
NetworkInterface ni = GetMainNetworkInterface();
IPAddress ipAddress = GetIpFromMac(ni.GetPhysicalAddress());
if (ipAddress == null) // could it be possible ?
{
ipAddress = GetIpFromMac(ni.GetPhysicalAddress(), AddressFamily.InterNetworkV6);
}
return ipAddress;
}
// ******************************************************************
public static bool IsBroadcastAddress(IPAddress ipAddress)
{
if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
{
return ipAddress.GetAddressBytes()[3] == 255;
}
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
return false; // NO broadcast in IPv6
}
return false;
}
// ******************************************************************
public static bool IsMulticastAddress(IPAddress ipAddress)
{
if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
{
// Source: https://technet.microsoft.com/en-us/library/cc772041(v=ws.10).aspx
return ipAddress.GetAddressBytes()[0] >= 224 && ipAddress.GetAddressBytes()[0] <= 239;
}
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
return ipAddress.IsIPv6Multicast;
}
return false;
}
// ******************************************************************
}
}
答案 16 :(得分：1)
以下是我如何解决它。我知道如果你有几个物理接口，这可能不会选择你想要的确切的eth。
private string FetchIP()
{
//Get all IP registered
List<string> IPList = new List<string>();
IPHostEntry host;
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
IPList.Add(ip.ToString());
}
}
//Find the first IP which is not only local
foreach (string a in IPList)
{
Ping p = new Ping();
string[] b = a.Split('.');
string ip2 = b[0] + "." + b[1] + "." + b[2] + ".1";
PingReply t = p.Send(ip2);
p.Dispose();
if (t.Status == IPStatus.Success && ip2 != a)
{
return a;
}
}
return null;
}
答案 17 :(得分：1)
using System;
using System.Net;
namespace IPADDRESS
{
class Program
{
static void Main(string[] args)
{
String strHostName = string.Empty;
if (args.Length == 0)
{
/* First get the host name of local machine.*/
strHostName = Dns.GetHostName();
Console.WriteLine("Local Machine's Host Name: " + strHostName);
}
else
{
strHostName = args[0];
}
/* Then using host name, get the IP address list..*/
IPHostEntry ipEntry = Dns.GetHostByName(strHostName);
IPAddress[] addr = ipEntry.AddressList;
for (int i = 0; i < addr.Length; i++)
{
Console.WriteLine("IP Address {0}: {1} ", i, addr[i].ToString());
}
Console.ReadLine();
}
}
}
答案 18 :(得分：1)
LINQ解决方案：
Dns.GetHostEntry(Dns.GetHostName()).AddressList.Where(ip => ip.AddressFamily == AddressFamily.InterNetwork).Select(ip => ip.ToString()).FirstOrDefault() ?? ""
答案 19 :(得分：1)
要查找IP地址列表，我已使用此解决方案
public static IEnumerable<string> GetAddresses()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
return (from ip in host.AddressList where ip.AddressFamily == AddressFamily.lo select ip.ToString()).ToList();
}
但我个人喜欢以下解决方案来获取本地有效的 IP地址
public static IPAddress GetIPAddress(string hostName)
{
Ping ping = new Ping();
var replay = ping.Send(hostName);
if (replay.Status == IPStatus.Success)
{
return replay.Address;
}
return null;
}
public static void Main()
{
Console.WriteLine("Local IP Address: " + GetIPAddress(Dns.GetHostName()));
Console.WriteLine("Google IP:" + GetIPAddress("google.com");
Console.ReadLine();
}
答案 20 :(得分：1)
return Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(ip => ip.AddressFamily == AddressFamily.InterNetwork);
返回第一个内部IPV4地址的简单单行代码，如果没有则返回null。作为上述评论添加，但可能对某人有用（上面的某些解决方案将返回需要进一步过滤的多个地址）。
使用以下方法返回loopback也很容易返回null：
return Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(ip => ip.AddressFamily == AddressFamily.InterNetwork) ?? new IPAddress( new byte[] {127, 0, 0, 1} );
答案 21 :(得分：1)
namespace NKUtilities
{
using System;
using System.Net;
public class DNSUtility
{
public static int Main (string [] args)
{
String strHostName = new String ("");
if (args.Length == 0)
{
// Getting Ip address of local machine...
// First get the host name of local machine.
strHostName = Dns.GetHostName ();
Console.WriteLine ("Local Machine's Host Name: " + strHostName);
}
else
{
strHostName = args[0];
}
// Then using host name, get the IP address list..
IPHostEntry ipEntry = DNS.GetHostByName (strHostName);
IPAddress [] addr = ipEntry.AddressList;
for (int i = 0; i < addr.Length; i++)
{
Console.WriteLine ("IP Address {0}: {1} ", i, addr[i].ToString ());
}
return 0;
}
}
}
答案 22 :(得分：1)
也许通过外部 IP，您可以考虑（如果您在Web服务器上下文中）使用此
Request.ServerVariables["LOCAL_ADDR"];
我问的是和你一样的问题，我在this stackoverflow文章中找到了它。
它对我有用。
答案 23 :(得分：0)
以最快的方式获取远程IP地址。您必须使用下载程序，或在计算机上创建服务器。
使用这个简单代码的缺点:(推荐使用）是获取远程IP地址需要3-5秒，因为初始化时的WebClient始终需要3-5秒来检查您的代理设置。 / p>
public static string GetIP()
{
string externalIP = "";
externalIP = new WebClient().DownloadString("http://checkip.dyndns.org/");
externalIP = (new Regex(@"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"))
.Matches(externalIP)[0].ToString();
return externalIP;
}
以下是我修复它的方法..（第一次仍然需要3-5秒），但之后它将始终在0-2秒内获取您的远程IP地址，具体取决于您的连接。
public static WebClient webclient = new WebClient();
public static string GetIP()
{
string externalIP = "";
externalIP = webclient.DownloadString("http://checkip.dyndns.org/");
externalIP = (new Regex(@"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"))
.Matches(externalIP)[0].ToString();
return externalIP;
}
答案 24 :(得分：0)
这是为了在VB.NET中以csv格式获取所有本地IP
Imports System.Net
Imports System.Net.Sockets
Function GetIPAddress() As String
Dim ipList As List(Of String) = New List(Of String)
Dim host As IPHostEntry
Dim localIP As String = "?"
host = Dns.GetHostEntry(Dns.GetHostName())
For Each ip As IPAddress In host.AddressList
If ip.AddressFamily = AddressFamily.InterNetwork Then
localIP = ip.ToString()
ipList.Add(localIP)
End If
Next
Dim ret As String = String.Join(",", ipList.ToArray)
Return ret
End Function
答案 25 :(得分：0)
获取公共IP地址的另一种方法是使用OpenDNS的resolve1.opendns.com服务器，并以myip.opendns.com作为请求。
在命令行上是：
nslookup myip.opendns.com resolver1.opendns.com
或者在C＃中使用DNSClient nuget：
var lookup = new LookupClient(new IPAddress(new byte[] { 208, 67, 222, 222 }));
var result = lookup.Query("myip.opendns.com", QueryType.ANY);
这比击中http端点并解析响应要干净一些。
答案 26 :(得分：0)
private static string GetLocalIpAdresse()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach(var ip in host.AddressList)
{
if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception ("No network adapters with an IPv4 address in the system");
}