/// <summary>Cancels a subscription and releases all resources allocated for it.</summary>
/// <requirements>OPC XML-DA Server or OPC Data Access Server V2.x / V3.x</requirements>
/// <param name="subscription">The subscription to cancel.</param>
public virtual void CancelSubscription(ITsCDaSubscription subscription)
{
if (subscription == null)
{
throw new ArgumentNullException("subscription");
}
if (_server == null)
{
throw new NotConnectedException();
}
// validate argument.
if (!typeof(TsCDaSubscription).IsInstanceOfType(subscription))
{
throw new ArgumentException("Incorrect object type.", "subscription");
}
if (!Equals(((TsCDaSubscription)subscription).Server))
{
throw new ArgumentException("Server subscription.", "subscription");
}
// search for subscription in list of subscriptions.
TsCDaSubscriptionCollection subscriptions = new TsCDaSubscriptionCollection();
foreach (TsCDaSubscription current in _subscriptions)
{
if (!subscription.Equals(current))
{
subscriptions.Add(current);
continue;
}
}
// check if subscription was not found.
if (subscriptions.Count == _subscriptions.Count)
{
throw new ArgumentException("Subscription not found.", "subscription");
}
// remove subscription from list of subscriptions.
_subscriptions = subscriptions;
// cancel subscription on server.
((ITsDaServer)_server).CancelSubscription(((TsCDaSubscription)subscription)._subscription);
}
/// <summary>Cancels a subscription and releases all resources allocated for it.</summary>
/// <requirements>OPC XML-DA Server or OPC Data Access Server V2.x / V3.x</requirements>
/// <param name="subscription">The subscription to cancel.</param>
public virtual void CancelSubscription(ITsCDaSubscription subscription)
{
LicenseHandler.ValidateFeatures(LicenseHandler.ProductFeature.DataAccess);
if (subscription == null)
{
throw new ArgumentNullException(nameof(subscription));
}
if (Server == null)
{
throw new NotConnectedException();
}
// validate argument.
if (!typeof(TsCDaSubscription).IsInstanceOfType(subscription))
{
throw new ArgumentException(@"Incorrect object type.", nameof(subscription));
}
if (!Equals(((TsCDaSubscription)subscription).Server))
{
throw new ArgumentException(@"Server subscription.", nameof(subscription));
}
// search for subscription in list of subscriptions.
TsCDaSubscriptionCollection subscriptions = new TsCDaSubscriptionCollection();
foreach (TsCDaSubscription current in subscriptions_)
{
if (!subscription.Equals(current))
{
subscriptions.Add(current);
}
}
// check if subscription was not found.
if (subscriptions.Count == subscriptions_.Count)
{
throw new ArgumentException(@"Subscription not found.", nameof(subscription));
}
// remove subscription from list of subscriptions.
subscriptions_ = subscriptions;
// cancel subscription on server.
((ITsDaServer)Server).CancelSubscription(((TsCDaSubscription)subscription).Subscription);
}
