Log Event

Useful for capturing discovery packets.

The following example demonstrates using the Log event to record traffic or update a UI.

C#

//Call file.Close() when the app shuts down
FileStream file = new FileStream("log.txt", FileMode.Append, FileAccess.Write);

private void manager1_Log(object sender, LogEventArgs e)
{
    //Write SNMP packets to a file
    string label = (e.Message.Origin == null) ? "\r\nSent:\r\n" : "\r\nReceived:\r\n";
    file.Write(System.Text.Encoding.Default.GetBytes(label), 0, label.Length);
    file.Write(e.Message.EncodedMessage, 0, e.Message.EncodedMessage.Length);

    //Indicate in UI that a message was received
    if (e.Message is ResponseMessage)
        label1.Text += System.DateTime.Now.ToString() + ": " + e.Message.Origin.ToString() + ": " +
            "Response received with " + e.Message.Variables.Count.ToString() + " variable(s).\r\n";
}

Visual Basic

'Call file.Close() when the app shuts down
Private file As New FileStream("log.txt", FileMode.Append, FileAccess.Write)

Private Sub manager1_Log(ByVal sender As Object, ByVal e As LogEventArgs)
    'Write SNMP packets to a file
    Dim label As String = If(e.Message.Origin Is Nothing, vbCrLf & "Sent:" & vbCrLf, vbCrLf & "Received:" & vbCrLf)
    file.Write(System.Text.Encoding.Default.GetBytes(label), 0, label.Length)
    file.Write(e.Message.EncodedMessage, 0, e.Message.EncodedMessage.Length)

    'Indicate in UI that a message was received
    If TypeOf e.Message Is ResponseMessage Then
        label1.Text &= Date.Now.ToString() & ": " & e.Message.Origin.ToString() & ": " & "Response received with " & e.Message.Variables.Count.ToString() & " variable(s)." & vbCrLf
    End If
End Sub

Reference

SnmpBase Class
SnmpBase Members