public override string GetValue(string itemName)
{
if (!ServiceManager.DesignMode && _opcDaServer.IsConnected)
{
string val = null;
OpcAddress addr = Find(itemName);
if (addr != null)
{
val = addr.Value;
}
else if (addr == null && AutoCreateAddr)
{
Add(itemName);
addr = Find(itemName);
val = addr.GetValue();
}
if (val == null)
{
val = addr.GetValue();
if (val != null)
{
addr.SetValue(val);
}
else
{
val = string.Empty;
}
}
return(val);
}
else
{
return(string.Empty);
}
}
public override void Add(string itemName)
{
lock (_thisLock)
{
try
{
OpcAddress addr = Find(itemName);
if (addr == null)
{
string[] itemIdSplited = itemName.Split(']');
string[] addressSplited;
string topic = "";
//Encontra o nome do topico
if (itemName.Contains(']'))
{
topic = itemName.Split(']')[0].Substring(1);
}
if (itemIdSplited.Length > 1)
{
addressSplited = itemIdSplited[1].Split(':');
}
else
{
itemIdSplited = itemName.Split('.');
addressSplited = itemIdSplited[2].Split(':');
}
Opc.Da.Subscription opcDaGroup = null;
foreach (Opc.Da.Subscription opcDaGrp in _opcDaServer.Subscriptions)
{
if (opcDaGrp.Name == topic + addressSplited[0])
{
opcDaGroup = opcDaGrp;
}
}
if (opcDaGroup == null)
{
Opc.Da.SubscriptionState groupState = new Opc.Da.SubscriptionState();
groupState.ClientHandle = Guid.NewGuid().ToString();
groupState.Name = topic + addressSplited[0];
// groupState.UpdateRate = 250;
opcDaGroup = (Opc.Da.Subscription)_opcDaServer.CreateSubscription(groupState);
//opcDaGroup.DataChanged += new Opc.Da.DataChangedEventHandler(OpcDataChanged);
opcDaGroup.DataChanged += delegate(object subscriptionHandle, object requestHandle, ItemValueResult[] values)
{
// BackgroundWorker back = new BackgroundWorker();
// back.DoWork += delegate(object sender, DoWorkEventArgs e)
// {
// foreach (Opc.Da.ItemValueResult ivr in values)
// {
// OpcAddress adr = Find(ivr.ItemName);
// adr.SetValue(ivr.Value.ToString());
// OnDataChanged(new DataChangedEventArgs(ivr.ItemName, ivr.Value));
// }
// };
// back.RunWorkerAsync();
foreach (Opc.Da.ItemValueResult ivr in values)
{
OpcAddress adr = Find(ivr.ItemName);
adr.SetValue(ivr.Value.ToString());
OnDataChanged(new DataChangedEventArgs(ivr.ItemName, ivr.Value));
}
};
}
Opc.Da.Item opcDaItem = new Opc.Da.Item();
opcDaItem.ClientHandle = Guid.NewGuid().ToString();
opcDaItem.ItemName = itemName;
opcDaItem.MaxAgeSpecified = true;
opcDaItem.MaxAge = 100;
opcDaItem.SamplingRateSpecified = true;
opcDaItem.SamplingRate = 10;
opcDaGroup.AddItems(new Opc.Da.Item[] { opcDaItem });
addr = new OpcAddress(opcDaItem, opcDaGroup);
_addrList.Add(addr);
}
return;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
}
}
