csharp:获取 DNS、网关、子网掩码、IP

/// <summary>
/// DNS、网关、子网掩码、IP
/// 涂聚文 2015
/// </summary>
public class IPAddressString
{
/// <summary>
/// IP地址
/// </summary>
private string _localAddress;
/// <summary>
/// 子网掩码
/// </summary>
private string _ipSubnet;
/// <summary>
/// 默认网关
/// </summary>
private string _defaultIPGateway;
/// <summary>
/// DNS
/// </summary>
private string _firstDNS;
/// <summary>
/// 备用DNS
/// </summary>
private string _secondDNS;
/// <summary>
///
/// </summary>
private string _hostName;
/// <summary>
///
/// </summary>
private string _macname;

/// <summary>
/// IP地址
/// </summary>
public string LocalAddress
{
get { return _localAddress; }
set { _localAddress = value; }
}

/// <summary>
/// 子网掩码
/// </summary>
public string IpSubnet
{
get { return _ipSubnet; }
set { _ipSubnet = value; }
}
/// <summary>
/// 默认网关
/// </summary>
public string DefaultIPGateway
{
get { return _defaultIPGateway; }
set { _defaultIPGateway = value; }
}
/// <summary>
/// DNS
/// </summary>
public string FirstDNS
{
get { return _firstDNS; }
set { _firstDNS = value; }
}
/// <summary>
/// 备用DNS
/// </summary>
public string SecondDNS
{
get { return _secondDNS; }
set { _secondDNS = value; }
}
/// <summary>
///
/// </summary>
public string HostName
{
get { return _hostName; }
set { _hostName = value; }
}
/// <summary>
///
/// </summary>
public string Macname
{
get { return _macname; }
set { _macname = value; }
}
}

/// <summary>
///获取 DNS、网关、子网掩码、IP
///GEOVIN DU
/// </summary>
/// <returns></returns>
public IPAddressString getIp()
{
IPAddressString ip = new IPAddressString();
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection nics = mc.GetInstances();
foreach (ManagementObject nic in nics)
{
if (Convert.ToBoolean(nic["ipEnabled"]) == true)
{
// Get IP,SubNetMask,Gateway
ip.LocalAddress = (nic["IPAddress"] as string[])[0];
ip.IpSubnet = (nic["IPSubnet"] as string[])[0];
ip.DefaultIPGateway = (nic["DefaultIPGateway"] as string[])[0];
ip.Macname = nic["MacAddress"].ToString();
ip.HostName = Dns.GetHostName();//计算机名
}
}

// Get DNS
NetworkInterface[] ifs = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface netif in ifs)
{
IPInterfaceProperties properties = netif.GetIPProperties();
IPAddressCollection dnses = properties.DnsAddresses;
if (dnses.Count > 0)
{
int i = 0;
foreach (IPAddress ipAddr in dnses)
{
// Set DNS To DNS TextBox
if (i == 0)
ip.FirstDNS = ipAddr.ToString();
else
ip.SecondDNS = ipAddr.ToString();

i++;
}
break;
}
}

return ip;
}

//1
//IPAddress ip = Dns.GetHostAddresses(Dns.GetHostName()).Where(address => address.AddressFamily == AddressFamily.InterNetwork).First();
//MessageBox.Show(ip.ToString());

//2
//IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
//foreach (IPAddress addr in localIPs)
//{
//    if (addr.AddressFamily == AddressFamily.InterNetwork)
//    {
//        MessageBox.Show(addr.ToString());
//    }

//}

//3.
//IPAddress ip = GetIPAddress("dusystem.com");
//MessageBox.Show(ip.ToString());

//4.
//List<string> ips = GetIPAddress(Dns.GetHostName());
//foreach (string s in ips)
//{
//    MessageBox.Show(s.ToString());
//}

//5
IPAddressString ip = getIp();
MessageBox.Show(ip.IpSubnet);