// event handler: called if any item in group has changed values
protected void theGrp_DataChange(object sender, DataChangeEventArgs e)
{
Trace.WriteLine("theGrp_DataChange id=" + e.transactionID.ToString() + " me=0x" + e.masterError.ToString("X"));
foreach (OPCItemState s in e.sts)
{
if (s.HandleClient != itmHandleClient) // only one client handle
{
continue;
}
Trace.WriteLine(" item error=0x" + s.Error.ToString("X"));
if (HRESULTS.Succeeded(s.Error))
{
Trace.WriteLine(" val=" + s.DataValue.ToString());
txtItemValue.Text = s.DataValue.ToString(); // update screen
txtItemQual.Text = OpcGroup.QualityToString(s.Quality);
txtItemTimeSt.Text = DateTime.FromFileTime(s.TimeStamp).ToString();
}
else
{
txtItemValue.Text = "ERROR 0x" + s.Error.ToString("X");
txtItemQual.Text = "error";
txtItemTimeSt.Text = "error";
}
}
}
public void TestQualityToString01()
{
//Testing ---
//Test Procedure Call
string result = OpcGroup.QualityToString(253);
}