Walk Event

Visual Basic (Declaration)
Visual Basic (Usage)
C#
Managed Extensions for C++
C++/CLI

Public Event Walk As EventHandler(Of WalkEventArgs)

Dim instance As Manager
Dim handler As EventHandler(Of WalkEventArgs)
 
AddHandler instance.Walk, handler

public event EventHandler<WalkEventArgs> Walk

public: __event EventHandler<WalkEventArgs*>* Walk

public:
event EventHandler<WalkEventArgs^>^ Walk

The event handler receives an argument of type WalkEventArgs containing data related to this event. The following WalkEventArgs properties provide information specific to this event.

Property	Description
Message	Returns the message argument provided by the Marshal method. (Inherited from Dart.Snmp.UserStateEventArgs)
UserState	Returns the user state argument provided by the Marshal method. (Inherited from Dart.Snmp.UserStateEventArgs)

See the SynchronizingObject property for information on updating UI controls in your event handler.

The following example demonstrates how to walk a MIB and display the response variables.

C#

private void button1_Click(object sender, EventArgs e)
{
    //Perform MIB walk on a worker thread
    manager1.Start(walkMib, manager1.Mib.GetByNodeName(NodeName.system).Oid);
}

private void walkMib(SnmpSocket managerSocket, object state)
{
    //The state contains the OID to walk (in this case, the system group)
    string oid = state as string;

    //Walk the MIB from the specified root OID
    VariableList variables = managerSocket.Walk(oid, myAgentAddress);

    //Marshal variables returned to the UI thread using the Walk event
    manager1.Marshal(oid, variables, "", null);
}

private void manager1_Walk(object sender, WalkEventArgs e)
{
    //Populate a treeview control with the returned variables
    e.Variables.Populate(tvwVariables, e.Oid, manager1.Mib);
}

Visual Basic

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    'Perform MIB walk on a worker thread
    manager1.Start(AddressOf walkMib, manager1.Mib.GetByNodeName(NodeName.system).Oid)
End Sub

Private Sub walkMib(ByVal managerSocket As SnmpSocket, ByVal state As Object)
    'The state contains the OID to walk (in this case, the system group)
    Dim oid As String = TryCast(state, String)

    'Walk the MIB from the specified root OID
    Dim variables As VariableList = managerSocket.Walk(oid, myAgentAddress)

    'Marshal variables returned to the UI thread using the Walk event
    manager1.Marshal(oid, variables, "", Nothing)
End Sub

Private Sub manager1_Walk(ByVal sender As Object, ByVal e As WalkEventArgs)
    'Populate a treeview control with the returned variables
    e.Variables.Populate(tvwVariables, e.Oid, manager1.Mib)
End Sub

Reference

Manager Class
Manager Members