Hi I'm trying to get my local ip4 address but the result only returning the IP of the IIS Server
here's my code:
public string GetLocalIPv4(NetworkInterfaceType _type)
{
string output = "";
foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces())
{
if (item.NetworkInterfaceType == _type && item.OperationalStatus == OperationalStatus.Up)
{
foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses)
{
if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
{
output = ip.Address.ToString();
}
}
}
}
return output;
}
string IPAddress = GetLocalIPv4(NetworkInterfaceType.Ethernet);
The IIS Authentication is I only enable the windows authentication, because I'm using window authentication. But why the returning ip is not my local ip4 instead the IIS server address?
In general:
HttpContext.Current.Request.UserHostAddress;
Tedious approach:
using System.Net.Sockets;
foreach(IPAddress ip in Dns.GetHostEntry(System.Environment.MachineName.AddressList){
if(ip.AddressFamily == AddressFamily.InterNetwork)
Console.WriteLine("IPV4"+ip.ToString());
if(ip.AddressFamily == AddressFamily.InterNetworkV6)
Console.WriteLine("IPV6"+ip.ToString());
Source: https://msdn.microsoft.com/en-us/library/system.net.sockets.addressfamily(v=vs.110).aspx
Related
I'm trying to get local ip address using this code in my website:
string ip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
The scenario is I try to call the website from 2 different ip address, the first call has been successfully but the second one is still displaying the first ip address.
But if I open the web using CTRL+SHIFT+R then both ip address were correct.
Somehow, the string ip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; is not refreshing and carried out the cache from previous call.
How do I get around this?
Below are several codes to get local ip address but it didn't work, it can only get the server ip (IIS IP) not the local ip
//code no 1
public static string GetLocalIPAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception("No network adapters with an IPv4 address in the system!");
}
//code no : 2
public static string[] GetAllLocalIPv4(NetworkInterfaceType _type)
{
List<string> ipAddrList = new List<string>();
foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces())
{
if (item.NetworkInterfaceType == _type && item.OperationalStatus == OperationalStatus.Up)
{
foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses)
{
if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
{
ipAddrList.Add(ip.Address.ToString());
}
}
}
}
return ipAddrList.ToArray();
}
//code no 3
public string GetLocalIpAddress2()
{
UnicastIPAddressInformation mostSuitableIp = null;
var networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (var network in networkInterfaces)
{
if (network.OperationalStatus != OperationalStatus.Up)
continue;
var properties = network.GetIPProperties();
if (properties.GatewayAddresses.Count == 0)
continue;
foreach (var address in properties.UnicastAddresses)
{
if (address.Address.AddressFamily != AddressFamily.InterNetwork)
continue;
if (IPAddress.IsLoopback(address.Address))
continue;
if (!address.IsDnsEligible)
{
if (mostSuitableIp == null)
mostSuitableIp = address;
continue;
}
// The best IP is the IP got from DHCP server
if (address.PrefixOrigin != PrefixOrigin.Dhcp)
{
if (mostSuitableIp == null || !mostSuitableIp.IsDnsEligible)
mostSuitableIp = address;
continue;
}
return address.Address.ToString();
}
}
return mostSuitableIp != null
? mostSuitableIp.Address.ToString()
: "";
}
//code no 4
public string GetIP4Address()
{
string IP4Address = String.Empty;
foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
{
if (IPA.AddressFamily == AddressFamily.InterNetwork)
{
IP4Address = IPA.ToString();
break;
}
}
return IP4Address;
}
Thanks,
Sam
I try to get my local ip, the code below shows you how i do that.
The problem with this is when i'm connectet to wifi and my ethernet-card is not connected
it gives me a 169.xxx.xxx.xxx adress.
How can i make a check to see wich networkcard is connected, and get that ip
private string GetLocalIP()
{
IPHostEntry host;
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
return ip.ToString();
}
return "127.0.0.1";
}
I use this:
List<IPAddress> addresses = new List<IPAddress>();
NetworkInterface[] networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface networkItf in networkInterfaces)
{
// check whether turned on
if (networkItf.OperationalStatus == OperationalStatus.Up)
{
// read the IP configuration for each network
IPInterfaceProperties properties = networkItf.GetIPProperties();
// each network interface may have multiple IP addresses
foreach (IPAddressInformation address in properties.UnicastAddresses)
{
// filter only IPv4 addresses, if required...
if (address.Address.AddressFamily != AddressFamily.InterNetwork)
continue;
// ignore loopback addresses (e.g., 127.0.0.1)
if (IPAddress.IsLoopback(address.Address))
continue;
// add result
addresses.Add(address.Address);
}
}
}
You can use the NetworkInterface class to see if there is a network interface that is indeed connected. Take a look at the relevant documentation here: https://msdn.microsoft.com/en-us/library/system.net.networkinformation.networkinterface(v=vs.110).aspx
This code snippet should give you the result you are interested in:
private string GetLocalIP()
{
var isConnected = System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
if (isConnected)
{
IPHostEntry host;
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
return ip.ToString();
}
}
return "127.0.0.1";
}
this works for me https://stackoverflow.com/a/27376368/7232036
private string localIP()
{
using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0))
{
socket.Connect("8.8.8.8", 65530);
IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint;
return endPoint.Address.ToString();
}
}
this will give the IP addresses you are looking for
foreach(NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
{
if(ni.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || ni.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
{
Console.WriteLine(ni.Name);
foreach (UnicastIPAddressInformation ip in ni.GetIPProperties().UnicastAddresses)
{
if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
Console.WriteLine(ip.Address.ToString());
}
}
}
}
I'm developing an application which needs user systems IP address for that i used below code
Get IP
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
foreach (IPAddress i in localIPs)
{
if (i.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
txtIP.Text = i.ToString();
}
}
In many systems it works very fine but some time it captures Loop-Back ip address 127.0.0.1. Can any one guide me how can i prevent application to capture loop-back IP.
Just filter the loopback IP
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
foreach (IPAddress i in localIPs)
{
if (i.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork
&& !IPAddress.isLoopback(i))
{
txtIP.Text = i.ToString();
}
}
I am currently trying to port an administrative console application over to a Win 10 UWP app. I am having trouble with using the System.Net.Dns from the following console code.
How can I get the devices IP
Here is the console app code that I am trying to port over.
public static string GetIP4Address()
{
string IP4Address = String.Empty;
foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
{
if (IPA.AddressFamily == AddressFamily.InterNetwork)
{
IP4Address = IPA.ToString();
break;
}
}
return IP4Address;
}
Use this to get host IPaddress in a UWP app, I've tested it:
foreach (HostName localHostName in NetworkInformation.GetHostNames())
{
if (localHostName.IPInformation != null)
{
if (localHostName.Type == HostNameType.Ipv4)
{
textblock.Text = localHostName.ToString();
break;
}
}
}
And see the API Doc here
You may try like this :
private string GetLocalIp()
{
var icp = NetworkInformation.GetInternetConnectionProfile();
if (icp?.NetworkAdapter == null) return null;
var hostname =
NetworkInformation.GetHostNames()
.SingleOrDefault(
hn =>
hn.IPInformation?.NetworkAdapter != null && hn.IPInformation.NetworkAdapter.NetworkAdapterId
== icp.NetworkAdapter.NetworkAdapterId);
// the ip address
return hostname?.CanonicalName;
}
the answer above is also right
based on answer by #John Zhang, but with fix to not throw LINQ error about multiple matches and return Ipv4 address:
public static string GetFirstLocalIp(HostNameType hostNameType = HostNameType.Ipv4)
{
var icp = NetworkInformation.GetInternetConnectionProfile();
if (icp?.NetworkAdapter == null) return null;
var hostname =
NetworkInformation.GetHostNames()
.FirstOrDefault(
hn =>
hn.Type == hostNameType &&
hn.IPInformation?.NetworkAdapter != null &&
hn.IPInformation.NetworkAdapter.NetworkAdapterId == icp.NetworkAdapter.NetworkAdapterId);
// the ip address
return hostname?.CanonicalName;
}
obviously you can pass HostNameType.Ipv6 instead of the Ipv4 which is the default (implicit) parameter value to get the Ipv6 address
I need to find out the local Ip address, for that reason I was using the following code:
IPHostEntry host;
string localIP = "";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
localIP = ip.ToString();
break;
}
}
return localIP;
I find out that when a PC has more than one IP with AddressFamily.InterNetwork I get always the first one. However I can't find any property to find out the active IP.
How can I get the correct IP?
Thanks for any tip!
I have picked this up from internet a while ago.
string strHostName = System.Net.Dns.GetHostName(); ;
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
IPAddress[] addr = ipEntry.AddressList;
This should give you an array of all the ip addresses of your pc.
Bwall has a fitting solution posted in this thread.
foreach(NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
{
if(ni.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || ni.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
{
Console.WriteLine(ni.Name);
foreach (UnicastIPAddressInformation ip in ni.GetIPProperties().UnicastAddresses)
{
if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
Console.WriteLine(ip.Address.ToString());
}
}
}
}
The important thing in this piece of code is, that it only lists IP addresses of ethernet and wireless interfaces. I doubt you'll have a serial connection active, so this won't matter most likely. Alternativly you can always edit the if statement.
//EDIT
If you only want to IP address which actually connects to the internet use Hosam Aly's solution
This is his code:
static IPAddress getInternetIPAddress()
{
try
{
IPAddress[] addresses = Dns.GetHostAddresses(Dns.GetHostName());
IPAddress gateway = IPAddress.Parse(getInternetGateway());
return findMatch(addresses, gateway);
}
catch (FormatException e) { return null; }
}
static string getInternetGateway()
{
using (Process tracert = new Process())
{
ProcessStartInfo startInfo = tracert.StartInfo;
startInfo.FileName = "tracert.exe";
startInfo.Arguments = "-h 1 www.example.com
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
tracert.Start();
using (StreamReader reader = tracert.StandardOutput)
{
string line = "";
for (int i = 0; i < 5; ++i)
line = reader.ReadLine();
line = line.Trim();
return line.Substring(line.LastIndexOf(' ') + 1);
}
}
}
static IPAddress findMatch(IPAddress[] addresses, IPAddress gateway)
{
byte[] gatewayBytes = gateway.GetAddressBytes();
foreach (IPAddress ip in addresses)
{
byte[] ipBytes = ip.GetAddressBytes();
if (ipBytes[0] == gatewayBytes[0]
&& ipBytes[1] == gatewayBytes[1]
&& ipBytes[2] == gatewayBytes[2])
{
return ip;
}
}
return null;
}
What it basically does, is trace the route to www.example.com and processes the right IP from there. I tested the code on my machine and needed to change the iterations from 9 to 5 to get the right line from stream. You better recheck it or you might into a NullReferenceException because line will be null.
static string GetActiveIP()
{
string ip = "";
foreach (NetworkInterface f in NetworkInterface.GetAllNetworkInterfaces())
{
if (f.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties ipInterface = f.GetIPProperties();
if (ipInterface.GatewayAddresses.Count > 0)
{`enter code here`
foreach (UnicastIPAddressInformation unicastAddress in ipInterface.UnicastAddresses)
{
if ((unicastAddress.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) && (unicastAddress.IPv4Mask.ToString() != "0.0.0.0"))
{
ip = unicastAddress.Address.ToString();
break;
}
}`enter code here`
}
}
}
return ip;
}