///////////////////////////////////////////////////////////////////////
#region Public Methods
/// <summary>
/// Connects to the server with the specified OpcUrl and credentials.
/// </summary>
public override void Connect(OpcUrl url, OpcConnectData connectData)
{
if (_factory == null)
{
_factory = new Com.Factory();
}
// connect to server.
base.Connect(url, connectData);
// all done if no subscriptions.
if (_subscriptions.Count == 0)
{
return;
}
// create subscriptions (should only happen if server has been deserialized).
SubscriptionCollection subscriptions = new SubscriptionCollection();
foreach (Ae.TsCAeSubscription template in _subscriptions)
{
// create subscription for template.
try { subscriptions.Add(EstablishSubscription(template)); }
catch { }
}
// save new set of subscriptions.
_subscriptions = subscriptions;
}
/// <summary>
/// Connects to the server with the specified OpcUrl and credentials.
/// </summary>
public override void Connect(OpcUrl url, OpcConnectData connectData)
{
LicenseHandler.ValidateFeatures(LicenseHandler.ProductFeature.HistoricalAccess);
if (Factory == null)
{
Factory = new Com.Factory();
}
// connect to server.
base.Connect(url, connectData);
// fetch supported attributes.
GetAttributes();
// fetch supported aggregates.
GetAggregates();
// create items for trends.
foreach (TsCHdaTrend trend in trends_)
{
ArrayList itemIDs = new ArrayList();
foreach (TsCHdaItem item in trend.Items)
{
itemIDs.Add(new OpcItem(item));
}
// save server handles for each item.
OpcItemResult[] results = CreateItems((OpcItem[])itemIDs.ToArray(typeof(OpcItem)));
if (results != null)
{
for (int ii = 0; ii < results.Length; ii++)
{
trend.Items[ii].ServerHandle = null;
if (results[ii].Result.Succeeded())
{
trend.Items[ii].ServerHandle = results[ii].ServerHandle;
}
}
}
}
}
/// <summary>Connects to the server with the specified OpcUrl and credentials.</summary>
/// <exception caption="OpcResultException Class" cref="OpcResultException">If an OPC specific error occur this exception is raised. The Result field includes then the OPC specific code.</exception>
/// <param name="url">The network address of the remote server.</param>
/// <param name="connectData">Any protocol configuration or user authentication information.</param>
public override void Connect(OpcUrl url, OpcConnectData connectData)
{
LicenseHandler.ValidateFeatures(LicenseHandler.ProductFeature.DataAccess);
if (Factory == null)
{
if (Factory == null)
{
Factory = new Com.Factory();
}
}
// connect to server.
base.Connect(url, connectData);
// all done if no subscriptions.
if (subscriptions_ == null)
{
return;
}
// create subscriptions (should only happen if server has been deserialized).
TsCDaSubscriptionCollection subscriptions = new TsCDaSubscriptionCollection();
foreach (TsCDaSubscription template in subscriptions_)
{
// create subscription for template.
try
{
subscriptions.Add(EstablishSubscription(template));
}
catch
{
// Ignore exceptions here
}
}
// save new set of subscriptions.
subscriptions_ = subscriptions;
}
/// <summary>
/// Initializes the object.
/// </summary>
public TsCHdaServer()
{
Factory = new Com.Factory();
}
/// <summary>
/// Returns a list of servers that support the specified specification on the specified host.
/// </summary>
public OpcServer[] GetAvailableServers(OpcSpecification specification, string host, OpcConnectData connectData)
{
lock (this)
{
NetworkCredential credentials = (connectData != null)?connectData.GetCredential(null, null):null;
// connect to the server.
m_server = (IOPCServerList2)Com.Interop.CreateInstance(CLSID, host, credentials);
m_host = host;
try
{
ArrayList servers = new ArrayList();
// convert the interface version to a guid.
Guid catid = new Guid(specification.Id);
// get list of servers in the specified specification.
IOPCEnumGUID enumerator = null;
m_server.EnumClassesOfCategories(
1,
new Guid[] { catid },
0,
null,
out enumerator);
// read clsids.
Guid[] clsids = ReadClasses(enumerator);
// release enumerator object.
Com.Interop.ReleaseServer(enumerator);
enumerator = null;
// fetch class descriptions.
foreach (Guid clsid in clsids)
{
Factory factory = new Com.Factory();
try
{
OpcUrl url = CreateUrl(specification, clsid);
OpcServer server = null;
if (specification == OpcSpecification.OPC_DA_30)
{
server = new TsCDaServer(factory, url);
}
else if (specification == OpcSpecification.OPC_DA_20)
{
server = new TsCDaServer(factory, url);
}
else if (specification == OpcSpecification.OPC_AE_10)
{
server = new TsCAeServer(factory, url);
}
else if (specification == OpcSpecification.OPC_HDA_10)
{
server = new TsCHdaServer(factory, url);
}
servers.Add(server);
}
catch (Exception)
{
// ignore bad clsids.
}
}
return((OpcServer[])servers.ToArray(typeof(OpcServer)));
}
finally
{
// free the server.
Com.Interop.ReleaseServer(m_server);
m_server = null;
}
}
}
