/// <see cref="BaseListCtrl.UpdateItem" />
protected override void UpdateItem(ListViewItem listItem, object item)
{
SimpleAttributeOperand clause = item as SimpleAttributeOperand;
if (clause == null)
{
base.UpdateItem(listItem, item);
return;
}
INode eventType = m_session.NodeCache.Find(clause.TypeDefinitionId);
if (eventType != null)
{
listItem.SubItems[0].Text = String.Format("{0}", eventType);
}
else
{
listItem.SubItems[0].Text = String.Format("(unspecified)");
}
listItem.SubItems[1].Text = String.Format("{0}", SimpleAttributeOperand.Format(clause.BrowsePath));
listItem.SubItems[2].Text = String.Format("{0}", clause.IndexRange);
listItem.Tag = item;
}
internal static Opc.Ua.EventFilter GetEventFilter(OpcUAQuery query, NamespaceTable namespaceTable)
{
var eventFilter = new Opc.Ua.EventFilter();
if (query.eventQuery?.eventColumns != null)
{
foreach (var column in query.eventQuery.eventColumns)
{
var bp = Converter.GetBrowsePath(column.browsePath, namespaceTable);
var path = SimpleAttributeOperand.Format(bp);
eventFilter.AddSelectClause(ObjectTypes.BaseEventType, path, Attributes.Value);
}
}
if (query.eventQuery?.eventFilters != null)
{
for (int i = 0; i < query.eventQuery.eventFilters.Length; i++)
{
var filter = query.eventQuery.eventFilters[i];
eventFilter.WhereClause.Push(filter.oper, GetOperands(filter, namespaceTable));
}
}
return(eventFilter);
}
/// <summary>
/// Utility method to combine the retrieved field names (from the monitored item filter select clause)
/// and the retrieved field values (from a received event) into a name/value dictionary.
/// </summary>
/// <param name="arg">A field list from a received event.</param>
/// <returns>A dictionary of field name to field value.</returns>
protected Dictionary <string, object> EventFieldListToDictionary(EventFieldList arg)
{
return
(((EventFilter)MonitoredItem.Filter).SelectClauses // all retrieved fields for event
.Zip(arg.EventFields) // values of retrieved fields
.ToDictionary(
p => SimpleAttributeOperand.Format(p.First.BrowsePath), // e.g. "/EventId"
p => p.Second.Value));
}
/// <summary>
/// Returns the field name the specified SelectClause in the EventFilter.
/// </summary>
public string GetFieldName(int index)
{
EventFilter filter = m_filter as EventFilter;
if (filter == null)
{
return(null);
}
if (index < 0 || index >= filter.SelectClauses.Count)
{
return(null);
}
return(Utils.Format("{0}", SimpleAttributeOperand.Format(filter.SelectClauses[index].BrowsePath)));
}