I need to get the IP Address, Subnet mask, gateway, DNS and check if DHCP is enabled from a given adapter.
I have this code that loads my Ethernet and Wireless Adapters:
public void LoadAdapters()
{
if (cmb1_adaptadores.Items.Count < 1)
{
NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in adapters)
{
var ipProps = adapter.GetIPProperties();
IPInterfaceProperties properties = adapter.GetIPProperties();
if (adapter.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
{
cmb1_adaptadores.Items.Add(adapter.Description);
}
}
}
cmb1_adaptadores.SelectedIndex = 0;
}
I've found many sample codes with foreach and loops to get every adapter ip, dns, etc.
I need an easier thing, but I don’t know how to approach it.
Using the adapter’s description from my combobox, I want to fill some labels with the adapters info, I mean:
If (adapter.description == cmb1_adaptadores.SelectedItem)
{
labelIP1 = adapter...
labelGATEWAY1 = adapter...
}
Of course it will be more complicated than a simple if, but this way every time a new item is selected, this method will run using the description selected in the combobox to reference the adapter.
Related
I am using xamarin forms and i have one problem,
i am trying to get the DNS server Adresse from WIFI, and a im using below code :
NetworkInterface[] networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface networkInterface in networkInterfaces)
{
if (networkInterface.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties ipProperties = networkInterface.GetIPProperties();
IPAddressCollection dnsAddresses = ipProperties.DnsAddresses;
foreach (IPAddress dnsAdress in dnsAddresses)
{
Debug.WriteLine(dnsAdress);
}
}
}
The problem is when i use this code on Microsoft Emulator "UWP" everything work fine see picture bellow using UWP device
but nothing work when i use my android mobile see picture bellow
using android device
NB: all devices are connect on the same wifi
I had done a simple to test your code and got the same null. And then I read the IPInterfaceProperties.DnsAddresses Property document, it seems that it doesn't support the xamarin.android.
You can check the it:https://learn.microsoft.com/en-us/dotnet/api/system.net.networkinformation.ipinterfaceproperties.dnsaddresses?view=net-6.0
In addition, I also search this but can not find any solution. So I try to use the android native method to get the dns address with the following code. So you can try to use the dependency service to get the dns address for android.
ConnectivityManager cm = (ConnectivityManager)GetSystemService(ConnectivityService);
//NetworkInfo has been deprecated, but I can not find the new api to to this
NetworkInfo activeNetworkInfo = cm.ActiveNetworkInfo;
foreach (Network network in cm.GetAllNetworks())
{
NetworkInfo networkInfo = cm.GetNetworkInfo(network);
if (networkInfo.GetType() == activeNetworkInfo.GetType())
{
LinkProperties lp = cm.GetLinkProperties(network);
foreach (InetAddress addr in lp.DnsServers)
{
var a = addr.GetAddress();
}
}
}
In C# I wish to get my own DHCP or Static IP address.
I use this code:
string host = Dns.GetHostName();
IPHostEntry ip = Dns.GetHostEntry(host);
Console.WriteLine(ip.AddressList[0].ToString());
and I get these results:
How do I know which one to use? I have virtual PCs installed on this PC as well.
You can use WMI to access network interface properties and find out is DHCP is enabled:
ManagementObjectSearcher searcherNetwork = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_NetworkAdapterConfiguration");
foreach (ManagementObject queryObj in searcherNetwork.Get())
{
foreach (var prop in queryObj.Properties)
{
Console.WriteLine(string.Format("Name: {0} Value: {1}", prop.Name, prop.Value));
}
}
Or you can use NetworkInterface.GetAllNetworkInterfaces() to get more info such as the Name and NetworkInterfaceType (Ethernet, Wireless80211 etc) and filter by those properties
You can also access IPv4InterfaceProperties.IsDhcpEnabled property such as:
foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
{
Console.WriteLine(ni.GetIPProperties().GetIPv4Properties().IsDhcpEnabled);
}
I have found the answer here:
Get IP Address using C#
This is the code (in case of a broken link. I just did not want to pass this code off as mine you see)
string hostName = Dns.GetHostName(); // Retrive the Name of HOST
Console.WriteLine(hostName);
// Get the IP
string myIP = Dns.GetHostByName(hostName).AddressList[0].ToString();
Console.WriteLine("My IP Address is :"+myIP);
I'm coding an application that has to get the network adapters configuration on a Windows 7 machine just like it's done in the Windows network adapters configuration panel:
So far I can get pretty much all the information I need from NetworkInterface.GetAllNetworkInterfaces() EXCEPT the subnet prefix length.
I'm aware that it can be retrieved from the C++ struc PMIB_UNICASTIPADDRESS_TABLE via OnLinkPrefixLength but I'm trying to stay in .net.
I also took a look at the Win32_NetworkAdapterConfiguration WMI class but it only seems to return the IP v4 subnet mask.
I also know that some information (not the prefix length, as far as I know) are in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters\Interfaces\{CLSID}
I also used SysInternals ProcessMon to try to get anything usefull when saving the network adapter settings but found nothing...
So, is there any clean .NET way to get this value? (getting it from the registry wouldn't be a problem)
EDIT: Gateways
This doesn't concern the actual question, but for those who need to retrieve the entire network adapter IPv6 configuration, the IPInterfaceProperties.GatewayAdresses property only supports the IPv4 gateways. As mentionned in the answer comments below, the only way to get the entire info until .NET framework 4.5 is to call WMI.
You can do so using Win32_NetworkAdapterConfiguration. You might have overlooked it.
IPSubnet will return an array of strings. Use the second value.
I didn't have time to whip up some C# code, but I'm sure you can handle it. Using WBEMTEST, I pulled this:
instance of Win32_NetworkAdapterConfiguration
{
Caption = "[00000010] Intel(R) 82579V Gigabit Network Connection";
DatabasePath = "%SystemRoot%\\System32\\drivers\\etc";
DefaultIPGateway = {"192.168.1.1"};
Description = "Intel(R) 82579V Gigabit Network Connection";
DHCPEnabled = TRUE;
DHCPLeaseExpires = "20120808052416.000000-240";
DHCPLeaseObtained = "20120807052416.000000-240";
DHCPServer = "192.168.1.1";
DNSDomainSuffixSearchOrder = {"*REDACTED*"};
DNSEnabledForWINSResolution = FALSE;
DNSHostName = "*REDACTED*";
DNSServerSearchOrder = {"192.168.1.1"};
DomainDNSRegistrationEnabled = FALSE;
FullDNSRegistrationEnabled = TRUE;
GatewayCostMetric = {0};
Index = 10;
InterfaceIndex = 12;
IPAddress = {"192.168.1.100", "fe80::d53e:b369:629a:7f95"};
IPConnectionMetric = 10;
IPEnabled = TRUE;
IPFilterSecurityEnabled = FALSE;
IPSecPermitIPProtocols = {};
IPSecPermitTCPPorts = {};
IPSecPermitUDPPorts = {};
IPSubnet = {"255.255.255.0", "64"};
MACAddress = "*REDACTED*";
ServiceName = "e1iexpress";
SettingID = "{B102679F-36AD-4D80-9D3B-D18C7B8FBF24}";
TcpipNetbiosOptions = 0;
WINSEnableLMHostsLookup = TRUE;
WINSScopeID = "";
};
IPSubnet[1] = IPv6 subnet;
Edit: Here's some code.
StringBuilder sBuilder = new StringBuilder();
ManagementObjectCollection objects = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration").Get();
foreach (ManagementObject mObject in objects)
{
string description = (string)mObject["Description"];
string[] addresses = (string[])mObject["IPAddress"];
string[] subnets = (string[])mObject["IPSubnet"];
if (addresses == null && subnets == null)
continue;
sBuilder.AppendLine(description);
sBuilder.AppendLine(string.Empty.PadRight(description.Length,'-'));
if (addresses != null)
{
sBuilder.Append("IPv4 Address: ");
sBuilder.AppendLine(addresses[0]);
if (addresses.Length > 1)
{
sBuilder.Append("IPv6 Address: ");
sBuilder.AppendLine(addresses[1]);
}
}
if (subnets != null)
{
sBuilder.Append("IPv4 Subnet: ");
sBuilder.AppendLine(subnets[0]);
if (subnets.Length > 1)
{
sBuilder.Append("IPv6 Subnet: ");
sBuilder.AppendLine(subnets[1]);
}
}
sBuilder.AppendLine();
sBuilder.AppendLine();
}
string output = sBuilder.ToString().Trim();
MessageBox.Show(output);
and some output:
Intel(R) 82579V Gigabit Network Connection
------------------------------------------
IPv4 Address: 192.168.1.100
IPv6 Address: fe80::d53e:b369:629a:7f95
IPv4 Subnet: 255.255.255.0
IPv6 Subnet: 64
Edit: I'm just going to clarify in case somebody searches for this later. The second item isn't always the IPv6 value. IPv4 can have multiple addresses and subnets. Use Integer.TryParse on the IPSubnet array value to make sure it's an IPv6 subnet and/or use the last item.
Parse the input stream of netsh with arguments:
interface ipv6 show route
Hope this helps!
From code I want to force a Windows machine to use a specific network adapter for all connections to a specific IP address.
I plan to do so by using the ROUTE ADD command line tool, but this requires that I know in advance the network adapters' index number (as it must be given to the ROUTE ADD command).
QUESTION: How can I programmatically retrieve a network adapter's index, given I know its name?
I'm aware that ROUTE PRINT shows me the information I need (the index numbers of all network adapters present), but there must be a way to get that information programmatically too (C#)?
Note, that I don't like parsing the text output from ROUTE PRINT, as the text format may change with different Windows versions.
You can obtain the interface index of your network adapter
by using the .Net NetworkInterface (and related) classes.
Here is a code example:
static void PrintInterfaceIndex(string adapterName)
{
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
Console.WriteLine("IPv4 interface information for {0}.{1}",
properties.HostName, properties.DomainName);
foreach (NetworkInterface adapter in nics)
{
if (adapter.Supports(NetworkInterfaceComponent.IPv4) == false)
{
continue;
}
if (!adapter.Description.Equals(adapterName, StringComparison.OrdinalIgnoreCase))
{
continue;
}
Console.WriteLine(adapter.Description);
IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
IPv4InterfaceProperties p = adapterProperties.GetIPv4Properties();
if (p == null)
{
Console.WriteLine("No information is available for this interface.");
continue;
}
Console.WriteLine(" Index : {0}", p.Index);
}
}
Then just call this function with the name of your network adapter:
PrintInterfaceIndex("your network adapter name");
You can also obtain the InterfaceIndex of your network adapter
by using the Win32_NetworkAdapter WMI class. The Win32_NetworkAdapter class
contains a property called InterfaceIndex.
So, to retrieve the InterfaceIndex for a network adapter with a given
name, use the following code:
ManagementScope scope = new ManagementScope("\\\\.\\ROOT\\cimv2");
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_NetworkAdapter WHERE Description='<Your Network Adapter name goes here>'");
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query))
{
using (ManagementObjectCollection queryCollection = searcher.Get())
{
foreach (ManagementObject mo in queryCollection)
{
Console.WriteLine("InterfaceIndex : {0}, name {1}", mo["InterfaceIndex"], mo["Description"]);
}
}
}
If you do not want to use WMI you could also use the Win32 API function
GetAdaptersInfo in combination with the IP_ADAPTER_INFO struct.
You will find an example here pinvoke.net.
have you looked into using C#'s system.net.networkinformation interface?
http://msdn.microsoft.com/en-us/library/system.net.networkinformation.networkinterface.getallnetworkinterfaces.aspx
I'm not familiar with ROUTE ADD, but you can theoretically marry up information from one with the other.
How can one get the default IP address excluding the 127.0.0.1 loopback address when mutliple IP addresses are assigned to PC i.e if the PC is multihomed.
Following code returns correct default IP address on one PC but returns incorrect IP address on another PC, so there must be some other solution.
private string[] GetDefaultIPWithSubnet()
{
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
string[] ipSubnet = new string[2];
foreach (ManagementObject mo in moc)
{
if ((bool)mo["IPEnabled"])
{
try
{
string[] ips = (string[])mo["IPAddress"];
string[] subnets = (string[])mo["IPSubnet"];
ipSubnet[0] = ips[0].ToString();
ipSubnet[1] = subnets[0].ToString();
break;
}
catch (Exception ex)
{
return null;
}
}
}
return ipSubnet;
}
public static void GetDefaultIp()
{
NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in adapters)
{
if (adapter.OperationalStatus == OperationalStatus.Up && adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
{
IPInterfaceProperties properties = adapter.GetIPProperties();
foreach (var x in properties.UnicastAddresses)
{
if (x.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
Console.WriteLine(" IPAddress ........ : {0:x}", x.Address.ToString());
}
}
}
}
I think you mean the interface with the default route. You can get the IPv4 route table with the GetIpForwardTable function (quick google reveals that it is callable through p/invoke) and look for a 0.0.0.0 destination route (run route print at command line to check what a route table looks like).
I think you misunderstood the meaning of IPEnabled, as far as I know that parameter is TRUE if TCP/IP is enabled on the interface. So I don't think this is what you're looking for.