/// <summary>
/// Creates a new subscription.
/// </summary>
/// <returns>The new subscription object.</returns>
/// <requirements>OPC XML-DA Server or OPC Data Access Server V2.x / V3.x</requirements>
/// <param name="state">The initial state of the subscription.</param>
public virtual ITsCDaSubscription CreateSubscription(TsCDaSubscriptionState state)
{
LicenseHandler.ValidateFeatures(LicenseHandler.ProductFeature.DataAccess);
if (state == null)
{
throw new ArgumentNullException(nameof(state));
}
if (Server == null)
{
throw new NotConnectedException();
}
// create subscription on server.
ITsCDaSubscription subscription = ((ITsDaServer)Server).CreateSubscription(state);
// set filters.
subscription.SetResultFilters(filters_);
// append new subscription to existing list.
TsCDaSubscriptionCollection subscriptions = new TsCDaSubscriptionCollection();
if (subscriptions_ != null)
{
foreach (TsCDaSubscription value in subscriptions_)
{
subscriptions.Add(value);
}
}
subscriptions.Add(CreateSubscription(subscription));
// save new subscription list.
subscriptions_ = subscriptions;
// return new subscription.
return(subscriptions_[subscriptions_.Count - 1]);
}
/// <summary>
/// Creates a new subscription.
/// </summary>
/// <returns>The new subscription object.</returns>
/// <requirements>OPC XML-DA Server or OPC Data Access Server V2.x / V3.x</requirements>
/// <param name="state">The initial state of the subscription.</param>
public virtual ITsCDaSubscription CreateSubscription(TsCDaSubscriptionState state)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
if (_server == null)
{
throw new NotConnectedException();
}
// create subscription on server.
ITsCDaSubscription subscription = ((ITsDaServer)_server).CreateSubscription(state);
// set filters.
subscription.SetResultFilters(_filters);
// append new subscription to existing list.
TsCDaSubscriptionCollection subscriptions = new TsCDaSubscriptionCollection();
if (_subscriptions != null)
{
foreach (TsCDaSubscription value in _subscriptions)
{
subscriptions.Add(value);
}
}
subscriptions.Add(CreateSubscription(subscription));
// save new subscription list.
_subscriptions = subscriptions;
// return new subscription.
return(_subscriptions[_subscriptions.Count - 1]);
}
/// <summary>
/// Updates the current subscription state.
/// </summary>
public TsCDaSubscriptionState ModifyState(int masks, TsCDaSubscriptionState state)
{
subscriptionState_ = Subscription.ModifyState(masks, state);
return(subscriptionState_);
}
/// <summary>
/// Returns the current subscription state.
/// </summary>
public TsCDaSubscriptionState GetState()
{
subscriptionState_ = Subscription.GetState();
return(subscriptionState_);
}
/// <summary>
/// Constructs a server by de-serializing its OpcUrl from the stream.
/// </summary>
protected TsCDaSubscription(SerializationInfo info, StreamingContext context)
{
subscriptionState_ = (TsCDaSubscriptionState)info.GetValue(Names.State, typeof(TsCDaSubscriptionState));
filters_ = (int)info.GetValue(Names.Filters, typeof(int));
daItems_ = (TsCDaItem[])info.GetValue(Names.Items, typeof(TsCDaItem[]));
}
/// <summary>
/// Updates the current subscription state.
/// </summary>
public TsCDaSubscriptionState ModifyState(int masks, TsCDaSubscriptionState state)
{
_state = _subscription.ModifyState(masks, state);
return(_state);
}
/// <summary>
/// Returns the current subscription state.
/// </summary>
public TsCDaSubscriptionState GetState()
{
_state = _subscription.GetState();
return(_state);
}
/// <summary>
/// Contructs a server by de-serializing its OpcUrl from the stream.
/// </summary>
protected TsCDaSubscription(SerializationInfo info, StreamingContext context)
{
_state = (TsCDaSubscriptionState)info.GetValue(Names.STATE, typeof(TsCDaSubscriptionState));
_filters = (int)info.GetValue(Names.FILTERS, typeof(int));
_items = (TsCDaItem[])info.GetValue(Names.ITEMS, typeof(TsCDaItem[]));
}
