获取系统当前网络的类型

来源：互联网发布：台风海燕知乎编辑：程序博客网时间：2024/05/22 21:53

/// <summary>
/// 获得所有工作状态的网络适配器名称
/// </summary>
/// <returns></returns>
public static NetworkInterface[] GetNetCardAdapters()
{
List<NetworkInterface> netCardAdapters = new List<NetworkInterface>();
NetworkInterface[] netWorks = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in netWorks)
{
if (adapter.NetworkInterfaceType == NetworkInterfaceType.Tunnel)
continue;

string mac = adapter.GetPhysicalAddress().ToString();

if (string.IsNullOrEmpty(mac) || adapter.OperationalStatus != OperationalStatus.Up)
{
continue;
}

int adapterType = IdentifyAdapterType(adapter.Id);
//去除虚拟网卡与未知设备
if (adapterType < 2)
{
continue;
}
netCardAdapters.Add(adapter);
}
return netCardAdapters.ToArray();
}

/// <summary>
/// 分辨网卡是真实，虚拟，还是无线
/// </summary>
/// <param name="adapterId"></param>
/// <returns>0未知网卡，1虚拟，2无线，3真实网卡</returns>
private static int IdentifyAdapterType(string adapterId)
{
string fRegistryKey = "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}\\" + adapterId + "\\Connection";

RegistryKey rk = Registry.LocalMachine.OpenSubKey(fRegistryKey, false);
if (rk != null)
{
// 区分 PnpInstanceID
// 如果前面有 PCI 就是本机的真实网卡
// MediaSubType 为 01 则是常见网卡，02为无线网卡。
string fPnpInstanceID = rk.GetValue("PnpInstanceID", "").ToString();
int fMediaSubType = Convert.ToInt32(rk.GetValue("MediaSubType", 0));
if (fPnpInstanceID.Length > 3 && fPnpInstanceID.Substring(0, 3) == "PCI")
return 3;
else if (fMediaSubType == 1)
return 1;
else if (fMediaSubType == 2)
return 2;
else if (fMediaSubType == 9)//3G网卡的值
return 9;
}
return 0;
}

/// <summary>
/// 获取当前网络连接类型
/// </summary>
/// <param name="ip"></param>
public static NetWorkType GetNetWorkType()
{
NetWorkType netType = NetWorkType.UnKnow;
NetworkInterface[] netCards = GetNetCardAdapters();
foreach (NetworkInterface adapter in netCards)
{
if (adapter.Description.Contains("Wireless") && netType != NetWorkType.Wan)
{
netType = NetWorkType.WLan;
}
else if (adapter.Description.Contains("3G"))
{
if (netType == NetWorkType.UnKnow)
{
netType = NetWorkType.W3G;
}
}
else
{
netType = NetWorkType.Wan;
}
}
return netType;
}