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Different Timestamp in SubscribeMultipleItems.

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22 Jul 2012 19:02 #949 by support
Hello.
Yes, all timestamps in OPC are in UTC (per the specs), and we are sticking to the same concept in QuickOPC.
You should be able to use the ToLocalTime() method on the DateTime to get what you want.
Best regards

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20 Jul 2012 18:12 #948 by jeancg
Good afternoon.

I noticed a difference between the timestamp informed by QuickOPC.NET and informed by my computer.

I'm referencing the example provided in the log database with multiple items using SubscribeMultipleItems.

int[] handleTeste1 = EasyDAClient.DefaultInstance.SubscribeMultipleItems(
new[]
{
new DAItemGroupArguments("", "CoDeSys.OPC.02", ".Teste1", 60000, null),
new DAItemGroupArguments("", "CoDeSys.OPC.02", ".Teste2", 60000, null),
new DAItemGroupArguments("", "CoDeSys.OPC.02", ".Teste3", 60000, null),
new DAItemGroupArguments("", "CoDeSys.OPC.02", ".Teste4", 60000, null),

},
(_, eventArgs) =>
{
Console.Write(".");
if (eventArgs.Vtq != null)
{
tableTeste1.Rows.Clear();
DataRow row = tableTeste1.NewRow();
row["ItemID"] = eventArgs.ItemDescriptor.ItemId;
row["Value"] = eventArgs.Vtq.Value;
row["Timestamp"] = (eventArgs.Vtq.Timestamp < (DateTime)SqlDateTime.MinValue)
? (DateTime)SqlDateTime.MinValue
: eventArgs.Vtq.Timestamp;
row["Quality"] = (short)eventArgs.Vtq.Quality;
tableTeste1.Rows.Add(row);

adapterTeste1.Update(dataSetTeste1, "TB_Teste1");
}
}
);

I believe this is referencing QuickOPC.NET the time zone (UTC), but my timezone is (UTC - 3:00) Brasilia. I have a difference of 3 hours in my logs from the database.

How could I set this timestamp to my time zone (UTC - 3:00) Brasilia?

Thank you.

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