| public ReadValue ( NodeId nodeId ) : DataValue | ||
| nodeId | NodeId | The node Id. |
| return | DataValue | |
/// <summary>
/// Updates the application after connecting to or disconnecting from the server.
/// </summary>
private void Server_ConnectComplete(object sender, EventArgs e)
{
try
{
m_session = ConnectServerCTRL.Session;
if (m_session == null)
{
return;
}
// set a suitable initial state.
if (m_session != null && !m_connectedOnce)
{
m_connectedOnce = true;
EventsLV.IsSubscribed = false;
EventsLV.DisplayConditions = true;
EventsLV.ChangeArea(Opc.Ua.ObjectIds.Server, false);
FilterDeclaration filter = new FilterDeclaration();
ushort namespaceIndex = (ushort)m_session.NamespaceUris.GetIndex(DsatsDemo.Namespaces.DsatsDemo);
filter.EventTypeId = ExpandedNodeId.ToNodeId(DsatsDemo.ObjectTypeIds.LockConditionType, m_session.NamespaceUris);
filter.AddSimpleField(String.Empty, BuiltInType.NodeId, false);
filter.AddSimpleField(Opc.Ua.BrowseNames.EventId, BuiltInType.ByteString, false);
filter.AddSimpleField(Opc.Ua.BrowseNames.EventType, BuiltInType.NodeId, false);
filter.AddSimpleField(Opc.Ua.BrowseNames.ConditionName, BuiltInType.String, true);
filter.AddSimpleField(new QualifiedName[] {
new QualifiedName(DsatsDemo.BrowseNames.LockState, namespaceIndex),
new QualifiedName(Opc.Ua.BrowseNames.CurrentState) },
BuiltInType.String,
ValueRanks.Scalar,
true);
filter.AddSimpleField(new QualifiedName(DsatsDemo.BrowseNames.ClientUserId, namespaceIndex), BuiltInType.String, true);
filter.AddSimpleField(new QualifiedName(DsatsDemo.BrowseNames.SubjectName, namespaceIndex), BuiltInType.String, true);
filter.AddSimpleField(new QualifiedName(DsatsDemo.BrowseNames.SessionId, namespaceIndex), BuiltInType.NodeId, true);
EventsLV.ChangeFilter(filter, true);
m_filter = filter;
PhaseCB.Items.Clear();
BrowseDescription nodeToBrowse = new BrowseDescription();
nodeToBrowse.NodeId = new NodeId(DsatsDemo.Objects.Rig_Phases, namespaceIndex);
nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HierarchicalReferences;
nodeToBrowse.IncludeSubtypes = true;
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
DataValue value = m_session.ReadValue(new NodeId(DsatsDemo.Variables.Rig_CurrentPhase, namespaceIndex));
NodeId currentPhase = value.GetValue<NodeId>(null);
ReferenceDescriptionCollection references = ClientUtils.Browse(m_session, nodeToBrowse, false);
if (references != null)
{
for (int ii = 0; ii < references.Count; ii++)
{
PhaseCB.Items.Add(references[ii]);
if (currentPhase == references[ii].NodeId)
{
PhaseCB.SelectedIndex = ii;
}
}
}
m_connectedOnce = true;
}
EventsLV.IsSubscribed = true;
EventsLV.ChangeSession(m_session, true);
EventsLV.ConditionRefresh();
}
catch (Exception exception)
{
MessageBox.Show(exception.Message, this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// Displays the available areas in a tree view.
/// </summary>
/// <param name="session">The session.</param>
/// <returns></returns>
public string ShowDialog(Session session)
{
m_session = session;
LocaleCB.Items.Clear();
// get the locales from the server.
DataValue value = m_session.ReadValue(VariableIds.Server_ServerCapabilities_LocaleIdArray);
if (value != null)
{
string[] availableLocales = value.GetValue<string[]>(null);
if (availableLocales != null)
{
for (int ii = 0; ii < availableLocales.Length; ii++)
{
LocaleCB.Items.Add(availableLocales[ii]);
}
}
}
// select the current locale.
if (LocaleCB.Items.Count > 0)
{
LocaleCB.SelectedIndex = 0;
}
// display the dialog.
if (ShowDialog() != DialogResult.OK)
{
return null;
}
return LocaleCB.SelectedItem as string;
}
/// <summary>
/// Sets the nodes in the control.
/// </summary>
public bool Update(Session session, NodeId methodId, bool inputArgs)
{
if (session == null) throw new ArgumentNullException("session");
if (methodId == null) throw new ArgumentNullException("methodId");
Clear();
m_session = session;
// find the method.
MethodNode method = session.NodeCache.Find(methodId) as MethodNode;
if (method == null)
{
return false;
}
// select the property to find.
QualifiedName browseName = null;
if (inputArgs)
{
browseName = Opc.Ua.BrowseNames.InputArguments;
}
else
{
browseName = Opc.Ua.BrowseNames.OutputArguments;
}
// fetch the argument list.
VariableNode argumentsNode = session.NodeCache.Find(methodId, ReferenceTypeIds.HasProperty, false, true, browseName) as VariableNode;
if (argumentsNode == null)
{
return false;
}
// read the value from the server.
DataValue value = m_session.ReadValue(argumentsNode.NodeId);
ExtensionObject[] argumentsList = value.Value as ExtensionObject[];
if (argumentsList != null)
{
for (int ii = 0; ii < argumentsList.Length; ii++)
{
AddItem(argumentsList[ii].Body as Argument);
}
}
AdjustColumns();
return ItemsLV.Items.Count > 0;
}
