我正在使用.NET 2在C#中编写一个软件,它检测Windows机器上是否存在活动的以太网连接。
重要的是它知道它是以太网而不是WiFi,因为程序的行为会有所不同,具体取决于使用WebClient发送数据是通过WiFi还是以太网。
我尝试过使用System.Net.NetworkInformation.NetworkInterfaceType,但这似乎报告了许多WiFi卡的“以太网”。
任何建议都将不胜感激。
答案 0 :(得分:5)
根据此MSDN page关于NetworkInterface.NetworkInterfaceType
属性,
此属性仅返回其子集 中定义的可能值 NetworkInterfaceType枚举。该 可能的值包括以下内容:
Ethernet Fddi Loopback Ppp Slip TokenRing Unknown
所以确定你可能是SOL。
但是,您可以在可用的网络连接上执行一些启发式方法,以确定它们是WiFi还是电缆。这些可能包括在多次迭代中采用的ping响应/延迟时间等。
此外,适配器的速度可以用作提示。对于我的WiFi适配器,速度始终显示为“54000000”(例如54 mbs)。由于有一组常见的WiFi速度,这可能会有所帮助。
也许以下代码可能会让您入门:
using System;
using System.Net.NetworkInformation;
using System.Net;
namespace ConsoleApplication7
{
class Program
{
static void Main(string[] args)
{
NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
Ping pingObj = new Ping();
for (int i = 0; i < adapters.Length; i++)
{
Console.WriteLine("Network adapter: {0}", adapters[i].Name);
Console.WriteLine(" Status: {0}", adapters[i].OperationalStatus.ToString());
Console.WriteLine(" Interface: {0}", adapters[i].NetworkInterfaceType.ToString());
Console.WriteLine(" Description: {0}", adapters[i].Description);
Console.WriteLine(" ID: {0}", adapters[i].Id);
Console.WriteLine(" Speed: {0}", adapters[i].Speed);
Console.WriteLine(" SupportsMulticast: {0}", adapters[i].SupportsMulticast);
Console.WriteLine(" IsReceiveOnly: {0}", adapters[i].IsReceiveOnly);
Console.WriteLine(" MAC: {0}", adapters[i].GetPhysicalAddress().ToString());
if (adapters[i].NetworkInterfaceType != NetworkInterfaceType.Loopback)
{
IPInterfaceProperties IPIP = adapters[i].GetIPProperties();
if (IPIP != null)
{
// First ensure that a gateway is reachable:
bool bGateWayReachable = false;
foreach (GatewayIPAddressInformation gw in IPIP.GatewayAddresses)
{
Console.WriteLine(" Gateway: {0} - ", gw.Address.ToString());
// TODO: Do this many times to establish an average:
PingReply pr = pingObj.Send(gw.Address, 2000);
if (pr.Status == IPStatus.Success)
{
Console.WriteLine(" reachable ({0}ms)", pr.RoundtripTime);
bGateWayReachable = true;
break;
}
else
Console.WriteLine(" NOT reachable");
}
// Next, see if any DNS server is available. These are most likely to be off-site and more highly available.
if (bGateWayReachable == true)
{
foreach (IPAddress ipDNS in IPIP.DnsAddresses)
{
Console.WriteLine(" DNS: {0} - ", ipDNS.ToString());
PingReply pr = pingObj.Send(ipDNS, 5000); // was 2000, increased for Cor in UK office
if (pr.Status == IPStatus.Success)
{
Console.WriteLine(" reachable ({0}ms)", pr.RoundtripTime);
Console.WriteLine(" --- SUCCESS ---");
break;
}
else
Console.WriteLine(" NOT reachable");
}
}
} // if (IPIP != null)
}
} // foreach (NetworkInterface n in adapters)
Console.ReadLine();
}
}
}