} // end ProcessCommandLine
public void Terminate()
{
if (m_areDaObjectsInitialized)
{
if (m_daSubscription.CurrentState != EnumObjectState.DISCONNECTED)
{
m_daSubscription.Disconnect(new ExecutionOptions());
}
if (m_daSession.CurrentState != EnumObjectState.DISCONNECTED)
{
m_daSession.Disconnect(new ExecutionOptions());
}
m_daSubscription.RemoveDaItem(m_daItem1);
m_daSubscription.RemoveDaItem(m_daItem2);
m_daSubscription.RemoveDaItem(m_daItem3);
m_daSubscription.RemoveDaItem(m_daItem4);
m_daSession.RemoveDaSubscription(m_daSubscription);
GetApplication().RemoveDaSession(m_daSession);
}
GetApplication().Terminate();
m_daSession = null;
m_daSubscription = null;
m_daItem1 = null;
m_daItem2 = null;
m_daItem3 = null;
m_daItem4 = null;
} // end Terminate
//-----------------
public MyDaItem(string itemId, MyDaSubscription parentSubscription) : base(itemId, parentSubscription)
{
StateChangeCompleted += new StateChangeEventHandler(HandleStateChanged);
PerformStateTransitionCompleted += new PerformStateTransitionEventHandler(HandlePerformStateTransition);
}
} // end Terminate
public int InitializeDaObjects()
{
int connectResult = (int)EnumResultCode.E_FAIL;
m_executionOptions = new ExecutionOptions();
m_executionOptions.ExecutionType = EnumExecutionType.ASYNCHRONOUS;
m_executionOptions.ExecutionContext = 0;
m_itemList = new MyDaItem[4];
m_itemIds = new string[] { "maths.sin", "time.local.second", "increment.UI1 array", "increment.BSTR" };
try
{
// TODO add your server URL here
// this is the server url for Softing OPCToolbox Demo Server
// first choice is COM-DA
string url = "opcda:///Softing.OPCToolboxDemo_ServerDA.1/{2E565242-B238-11D3-842D-0008C779D775}";
//uncomment if you need an XML-DA access
// string url = "http://localhost:8079/OPC/DA";
m_daSession = new MyDaSession(url);
if (!m_daSession.Valid)
{
return(connectResult);
}
m_daSubscription = new MyDaSubscription(1000, m_daSession);
if (!m_daSubscription.Valid)
{
return(connectResult);
}
m_daItem1 = new MyDaItem("maths.sin", m_daSubscription);
if (!m_daItem1.Valid)
{
return(connectResult);
}
m_itemList[0] = m_daItem1;
m_daItem2 = new MyDaItem("time.local.second", m_daSubscription);
if (!m_daItem2.Valid)
{
return(connectResult);
}
m_itemList[1] = m_daItem2;
m_daItem3 = new MyDaItem("increment.UI1 array", m_daSubscription);
if (!m_daItem3.Valid)
{
return(connectResult);
}
m_itemList[2] = m_daItem3;
m_daItem4 = new MyDaItem("increment.BSTR", m_daSubscription);
if (!m_daItem4.Valid)
{
return(connectResult);
}
m_itemList[3] = m_daItem4;
m_areDaObjectsInitialized = true;
connectResult = m_daSession.Connect(true, true, null);
}
catch (Exception exc)
{
GetApplication().Trace(
EnumTraceLevel.ERR,
EnumTraceGroup.USER,
"OpcClient::InitializaDaObjects",
exc.ToString());
} // end try...catch
return(connectResult);
} // end InitializeDaObjects