public AFListResults <PIPoint, AFDataPipeEvent> AddSignupsWithInitEvents(IList <PIPoint> piPoints)
{
if (_PIPipe != null)
{
return(_PIPipe.AddSignupsWithInitEvents(piPoints));
}
else
{
throw new NullReferenceException("The PIDataPipe cannot be null");
}
}
private void SubscribeToPointUpdates(MeasurementKey[] keys)
{
OnStatusMessage(MessageLevel.Info, $"Subscribing to updates for {keys.Length} measurements...");
var query = from row in DataSource.Tables["ActiveMeasurements"].AsEnumerable()
from key in keys
where row["ID"].ToString() == key.ToString()
select new
{
Key = key,
AlternateTag = row["AlternateTag"].ToString(),
PointTag = row["PointTag"].ToString()
};
List <PIPoint> dataPoints = new List <PIPoint>();
foreach (var row in query)
{
string tagName = row.PointTag;
if (!string.IsNullOrWhiteSpace(row.AlternateTag))
{
tagName = row.AlternateTag;
}
OnStatusMessage(MessageLevel.Debug, $"DEBUG: Looking up point tag '{tagName}'...");
PIPoint point = GetPIPoint(m_connection.Server, tagName);
if ((object)point != null)
{
OnStatusMessage(MessageLevel.Debug, $"DEBUG: Found point tag '{tagName}'...");
dataPoints.Add(point);
m_tagKeyMap[point.ID] = row.Key;
}
else
{
OnStatusMessage(MessageLevel.Debug, $"DEBUG: Failed to find point tag '{tagName}'...");
}
}
// Remove sign-ups for any existing point list
if ((object)m_dataPoints != null)
{
m_dataPipe.RemoveSignups(m_dataPoints);
}
// Sign up for updates on selected points
AFListResults <PIPoint, AFDataPipeEvent> initialEvents = m_dataPipe.AddSignupsWithInitEvents(dataPoints);
OnStatusMessage(MessageLevel.Debug, $"DEBUG: Initial event count = {initialEvents.Results.Count}...");
foreach (AFDataPipeEvent item in initialEvents.Results)
{
OnStatusMessage(MessageLevel.Debug, "DEBUG: Found initial event for action...");
if (item.Action != AFDataPipeAction.Delete)
{
m_dataUpdateObserver_DataUpdated(this, new EventArgs <AFValue>(item.Value));
}
}
m_dataPoints = dataPoints;
m_eventTimer.Enabled = true;
}
