如果您知道那里有哪些设备，则可以使用Ping类。这样至少可以填充ARP表。您始终可以执行ARP
-a并根据需要解析输出。这也是一个链接，该链接显示了如何点选以调用GetIpNetTable。我在下面提供了Ping类的示例，以及如何使用GetIpNetTable访问ARP表的示例。
这是Ping类的一个示例
using System;using System.Net;using System.Net.NetworkInformation;using System.Text;namespace Examples.System.Net.NetworkInformation.PingTest{ public class PingExample { // args[0] can be an IPaddress or host name. public static void Main (string[] args) { Ping pingSender = new Ping (); PingOptions options = new PingOptions (); // Use the default Ttl value which is 128, // but change the fragmentation behavior. options.DontFragment = true; // Create a buffer of 32 bytes of data to be transmitted. string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; byte[] buffer = Encoding.ASCII.GetBytes (data); int timeout = 120; PingReply reply = pingSender.Send (args[0], timeout, buffer, options); if (reply.Status == IPStatus.Success) { Console.WriteLine ("Address: {0}", reply.Address.ToString ()); Console.WriteLine ("RoundTrip time: {0}", reply.RoundtripTime); Console.WriteLine ("Time to live: {0}", reply.Options.Ttl); Console.WriteLine ("Don't fragment: {0}", reply.Options.DontFragment); Console.WriteLine ("Buffer size: {0}", reply.Buffer.Length); } } }}这是GetIpNetTable的示例。
using System;using System.Runtime.InteropServices;using System.ComponentModel; using System.Net;namespace GetIpNetTable{ class Program { // The max number of physical addresses. const int MAXLEN_PHYSADDR = 8; // Define the MIB_IPNETROW structure. [StructLayout(LayoutKind.Sequential)] struct MIB_IPNETROW { [MarshalAs(UnmanagedType.U4)] public int dwIndex; [MarshalAs(UnmanagedType.U4)] public int dwPhysAddrLen; [MarshalAs(UnmanagedType.U1)] public byte mac0; [MarshalAs(UnmanagedType.U1)] public byte mac1; [MarshalAs(UnmanagedType.U1)] public byte mac2; [MarshalAs(UnmanagedType.U1)] public byte mac3; [MarshalAs(UnmanagedType.U1)] public byte mac4; [MarshalAs(UnmanagedType.U1)] public byte mac5; [MarshalAs(UnmanagedType.U1)] public byte mac6; [MarshalAs(UnmanagedType.U1)] public byte mac7; [MarshalAs(UnmanagedType.U4)] public int dwAddr; [MarshalAs(UnmanagedType.U4)] public int dwType; } // Declare the GetIpNetTable function. [Dllimport("IpHlpApi.dll")] [return: MarshalAs(UnmanagedType.U4)] static extern int GetIpNetTable( IntPtr pIpNetTable, [MarshalAs(UnmanagedType.U4)] ref int pdwSize, bool bOrder); [Dllimport("IpHlpApi.dll", SetLastError = true, CharSet = CharSet.Auto)] internal static extern int FreeMibTable(IntPtr plpNetTable); // The insufficient buffer error. const int ERROR_INSUFFICIENT_BUFFER = 122; static void Main(string[] args) { // The number of bytes needed. int bytesNeeded = 0; // The result from the API call. int result = GetIpNetTable(IntPtr.Zero, ref bytesNeeded, false); // Call the function, expecting an insufficient buffer. if (result != ERROR_INSUFFICIENT_BUFFER) { // Throw an exception. throw new Win32Exception(result); } // Allocate the memory, do it in a try/finally block, to ensure // that it is released. IntPtr buffer = IntPtr.Zero; // Try/finally. try { // Allocate the memory. buffer = Marshal.AllocCoTaskMem(bytesNeeded); // Make the call again. If it did not succeed, then // raise an error. result = GetIpNetTable(buffer, ref bytesNeeded, false); // If the result is not 0 (no error), then throw an exception. if (result != 0) { // Throw an exception. throw new Win32Exception(result); } // Now we have the buffer, we have to marshal it. We can read // the first 4 bytes to get the length of the buffer. int entries = Marshal.ReadInt32(buffer); // Increment the memory pointer by the size of the int. IntPtr currentBuffer = new IntPtr(buffer.ToInt64() + Marshal.SizeOf(typeof(int))); // Allocate an array of entries. MIB_IPNETROW[] table = new MIB_IPNETROW[entries]; // Cycle through the entries. for (int index = 0; index < entries; index++) { // Call PtrToStructure, getting the structure information. table[index] = (MIB_IPNETROW) Marshal.PtrToStructure(new IntPtr(currentBuffer.ToInt64() + (index * Marshal.SizeOf(typeof(MIB_IPNETROW)))), typeof(MIB_IPNETROW)); } for (int index = 0; index < entries; index++) { MIB_IPNETROW row = table[index]; IPAddress ip=new IPAddress(BitConverter.GetBytes(row.dwAddr)); Console.Write("IP:"+ip.ToString()+"ttMAC:"); Console.Write( row.mac0.ToString("X2") + '-'); Console.Write( row.mac1.ToString("X2") + '-'); Console.Write( row.mac2.ToString("X2") + '-'); Console.Write( row.mac3.ToString("X2") + '-'); Console.Write( row.mac4.ToString("X2") + '-'); Console.WriteLine( row.mac5.ToString("X2")); } } finally { // Release the memory. FreeMibTable(buffer); } } }}
