public static void GetHistory(TimeSeriesBlock tsb)
{
Console.WriteLine("Read OPC UA Historical Data:");
try
{
ErrorMessage = "";
startTime = tsb.opcLastTimeStamp;
endTime = DateTime.UtcNow + TimeSpan.FromMinutes(120);
tsb.opcLastTimeStamp = endTime;
if (session == null)
{
Connect(tsb);
}
GetData(tsb);
}
catch (Exception ex)
{
ErrorMessage = ex.Message;
session?.Close();
session?.Dispose();
session = null;
opc = null;
}
/*
* session?.Close();
* session?.Dispose();
* session = null;
*/
}
public static void Connect(TimeSeriesBlock tsb)
{
if (opc == null)
{
opc = new UASampleClient(tsb.sourceAddress, true, 10000, tsb.username, tsb.password);
}
opc.ConsoleSampleClient().Wait();
session = opc.session;
}