Hi All,

Please find my code below:-

This code uses the WMI query to retrieve the SNMP trap from a particular host
Also find the output of this code listed below:--


Public Function event2() As Boolean

Try

Dim connection As New ConnectionOptions()
' connection.Username = "administrator"
'connection.Password = "Admin#123"
'connection.Authority = "ntlmdomain:DOMAIN"

Dim scope As New ManagementScope("\\localhost\root\snmp\localhost", connection)
scope.Connect()

Dim query As New WqlEventQuery("SELECT * FROM SNMPV1ExtendedNotification")

Dim watcher As New ManagementEventWatcher(scope, query)


Console.WriteLine("Waiting for an event on FullComputerName ...")

Dim eventObj As ManagementBaseObject = watcher.WaitForNextEvent()
watcher.Start()

TrapReceive(eventObj)

Dim s() As System.Management.ManagementBaseObject
Dim ie As System.Collections.IEnumerator

s = eventObj("VarBindList")

ie = s.GetEnumerator

Dim i As Integer
Dim DC As System.Text.Decoder
Dim strConvertToUTF8 As String
Dim byteArr() As Byte


DC = System.Text.Encoding.UTF8.GetDecoder

Console.Write("The array contains the following values")

While ie.MoveNext()

strConvertToUTF8 = s(i).GetText(TextFormat.Mof)
Console.WriteLine("{0}", strConvertToUTF8)

i = i + 1
End While
' Cancel the event subscription
watcher.Stop()

Close()


Catch err As ManagementException

MessageBox.Show("An error occurred while trying to receive an event: " & err.Message)

Catch unauthorizedErr As System.UnauthorizedAccessException

MessageBox.Show("Connection error (user name or password might be incorrect): " & unauthorizedErr.Message)

End Try


End Function

Public Function TrapReceive(ByVal eventObj As ManagementBaseObject) As Boolean

Console.WriteLine("{0} event occurred.", eventObj("__CLASS"))
Console.WriteLine("{0} Community name---> .", eventObj("Community"))

' Display information from the event
Console.WriteLine("Process {0} has created, path is: ", eventObj("__PATH"))
Console.WriteLine("Property count {0}", eventObj("__PROPERTY_COUNT"))
Console.WriteLine("Relative path {0} ", eventObj("__RELPATH"))
Console.WriteLine("Server {0} ", eventObj("__SERVER"))
Console.WriteLine("SUPERCLASS {0} ", eventObj("__SUPERCLASS"))
Console.WriteLine("AgentAddress {0} ", eventObj("AgentAddress"))
Console.WriteLine("AgentTransportAddress {0} ", eventObj("AgentTransportAddress"))
Console.WriteLine("AgentTransportProtocol {0} ", eventObj("AgentTransportProtocol"))
Console.WriteLine("Identification {0} ", eventObj("Identification"))
Console.WriteLine("TimeStamp {0} ", eventObj("TimeStamp"))
Console.WriteLine("VarBindList {0} ", eventObj("VarBindList"))

End Function


OutPut
===========


Waiting for an event on FullComputerName ...
SnmpV1ExtendedNotification event occurred.
public Community name---> .
Process has created, path is:
Property count 9
Relative path
Server
SUPERCLASS SnmpExtendedNotification
AgentAddress 10.217.65.161
AgentTransportAddress 10.217.65.161
AgentTransportProtocol IP
Identification 1.3.6.1.4.1.393.200.50.66.0.3
TimeStamp 20
VarBindList System.Management.ManagementBaseObject[]

The array contains the following values
==========

The following output is the SNMPVArBindlist that has been extracted from a SNMP trap..

I need your help to decode this structure and get it into a readable format.
Please help !!
instance of SnmpVarBind
{
Encoding = "OCTET STRING";
ObjectIdentifier = "1.3.6.1.4.1.393.200.50.66.1.1";
Value = {84, 104, 101, 32, 83, 99, 97, 110, 32, 69, 110, 103, 105, 110, 101, 32, 104, 97, 115, 32, 98, 101, 101, 110, 32, 109, 97, 110, 117, 97, 108, 108, 121, 32, 115, 104, 117, 116, 32, 100, 111, 119, 110};
};


instance of SnmpVarBind
{
Encoding = "OCTET STRING";
ObjectIdentifier = "1.3.6.1.4.1.393.200.50.66.1.2";
Value = {49, 48, 46, 50, 49, 55, 46, 54, 53, 46, 49, 54, 49};
};