SNMP協議的實現方法有很多，現在我們就來介紹一下，用AdventNet SNMP獲取SNMP表信息的方式。那么本文主要是基于C#的編寫來完成這個過程。希望對大家有一個參考價值。

用AdventNet SNMP API獲取SNMP表信息(C#)

using System;
using adventnet.snmp.snmp2;
public class snmpget
{
    [STAThread]
    public static void Main(System.String[] args)
    {
        // getting the hostname and the OID from the command line
        // Start SNMP API
        SnmpAPI api = new SnmpAPI();
        //api.Debug = true;
        // Open session
        SnmpSession session = new SnmpSession(api);
        //Build GET Request PDU
        SnmpPDU pdu = new SnmpPDU();
        pdu.Community = "public";
        pdu.WriteCommunity = "jinyun888";
        System.String remoteHost = "211.101.116.112";
        UDPProtocolOptions option = new UDPProtocolOptions(remoteHost);
        pdu.ProtocolOptions = option;
        pdu.Timeout = 10000;
        pdu.Retries = 3;
        pdu.Command = adventnet.snmp.snmp2.SnmpAPI.GETNEXT_REQ_MSG;
        SnmpOID[] oids = new SnmpOID[3];
        oids[0] = new SnmpOID(".1.3.6.1.4.1.429.1.1.2.1.1.1");
        oids[1] = new SnmpOID(".1.3.6.1.4.1.429.1.1.2.1.1.3");
        oids[2] = new SnmpOID(".1.3.6.1.4.1.429.1.1.2.1.1.4");
        
        for (int i = 0; i < 3; i++)
        {
            pdu.AddNull(oids[i]);
        }
        SnmpOID rootoid = new SnmpOID(".1.3.6.1.4.1.429.1.1.2.1.1.1.");
        String root = rootoid.ToString(); 
        try
        {
            session.Open();
        }
        catch (SnmpException e)
        {
            System.Console.Error.WriteLine("Error opening socket: " + e);
        }
        // add OIDs
        while (true)
        // until received OID isn't in sub-tree
        {
            try
            {
                // Send PDU and receive response PDU
                pdu = session.SyncSend(pdu);
            }
            catch (SnmpException e)
            {
                System.Console.Error.WriteLine("Sending PDU" + e.Message);
                System.Environment.Exit(1);
            }
            if (pdu == null)
            {
                System.Console.Out.WriteLine("Request timed out to: " );
                System.Environment.Exit(1);
            }
            //check for out index
            if (!(pdu.GetObjectID(0).ToString().StartsWith(root)))
            {
                break;
            }
            int version = pdu.Version;
            if (version == SnmpAPI.SNMP_VERSION_1)
            {
                // check for error 
                if (pdu.Errstat != 0)
                {
                    System.Console.Out.WriteLine("Error Indication in response: " + SnmpException.ExceptionString((sbyte)pdu.Errstat) + "\nErrindex: " + pdu.Errindex);
                    System.Environment.Exit(1);
                }
                // print response pdu variable-bindings
                System.Console.Out.WriteLine(pdu.PrintVarBinds());
            }
            else if (version == SnmpAPI.SNMP_VERSION_2C)
            {
                System.Collections.IEnumerator e = pdu.VariableBindings.GetEnumerator();
                while (e.MoveNext())
                {
                    int error = 0;
                    SnmpVarBind varbind = (SnmpVarBind)e.Current;
                    // check for error
                    if ((error = varbind.Errindex) != 0)
                    {
                        System.Console.Out.WriteLine("Error Indication in response: " + SnmpException.ExceptionString((sbyte)error));
                        System.Environment.Exit(1);
                    }
                    // print response pdu variable-bindings
                    System.Console.Out.WriteLine(pdu.PrintVarBinds());
                }
            }
            else
            {
                System.Console.Out.WriteLine("Invalid Version Number");
            }
            // set GETNEXT_REQ_MSG to do walk
            // Don't forget to set request id to 0 otherwise next request will fail
            pdu.Reqid = 0;
            pdu.Command = adventnet.snmp.snmp2.SnmpAPI.GETNEXT_REQ_MSG;
        } // end of while true
        // close session
        session.Close();
        //close the api thread
        api.Close();
    }
}

那么到這里用AdventNet SNMP的實現代碼已經完成了。本文出自http://www.cnblogs.com/luluping/archive/2010/04/16/1713516.html