/// <summary>
/// Updates the display with a new value for a monitored variable.
/// </summary>
private void MonitoredItem_Notification(MonitoredItem monitoredItem, MonitoredItemNotificationEventArgs e)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new MonitoredItemNotificationEventHandler(MonitoredItem_Notification), monitoredItem, e);
return;
}
try
{
// check for valid notification.
EventFieldList notification = e.NotificationValue as EventFieldList;
if (notification == null)
{
return;
}
// check if monitored item has changed.
if (!Object.ReferenceEquals(m_monitoredItem, monitoredItem))
{
return;
}
// check if the filter has changed.
if (notification.EventFields.Count != m_filter.Fields.Count + 1)
{
return;
}
if (m_displayConditions)
{
NodeId eventTypeId = m_filter.GetValue <NodeId>(Opc.Ua.BrowseNames.EventType, notification.EventFields, null);
if (eventTypeId == Opc.Ua.ObjectTypeIds.RefreshStartEventType)
{
EventsLV.Items.Clear();
}
if (eventTypeId == Opc.Ua.ObjectTypeIds.RefreshEndEventType)
{
return;
}
}
// create an item and add to top of list.
ListViewItem item = CreateListItem(m_filter, notification.EventFields);
if (item.ListView == null)
{
EventsLV.Items.Insert(0, item);
}
// adjust the width of the columns.
for (int ii = 0; ii < EventsLV.Columns.Count; ii++)
{
EventsLV.Columns[ii].Width = -2;
}
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
