/// <summary>
/// Removes items from a subscription.
/// </summary>
public virtual OpcItemResult[] RemoveItems(OpcItem[] items)
{
LicenseHandler.ValidateFeatures(LicenseHandler.ProductFeature.DataAccess);
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
// check if there is nothing to do.
if (items.Length == 0)
{
return(new OpcItemResult[0]);
}
// remove items from server.
OpcItemResult[] results = Subscription.RemoveItems(items);
if (results == null || results.Length == 0)
{
throw new OpcResultException(new OpcResult(OpcResult.E_FAIL.Code, OpcResult.FuncCallType.SysFuncCall, null), "The browse operation cannot continue");
}
// remove items from local list if successful.
ArrayList itemList = new ArrayList();
foreach (TsCDaItem item in daItems_)
{
bool removed = false;
for (int ii = 0; ii < results.Length; ii++)
{
if (item.ServerHandle.Equals(items[ii].ServerHandle))
{
removed = results[ii].Result.Succeeded();
break;
}
}
if (!removed)
{
itemList.Add(item);
}
}
// update local list.
daItems_ = (TsCDaItem[])itemList.ToArray(typeof(TsCDaItem));
// update the local state.
GetState();
// return results.
return(results);
}
private void TestMI_Click(object sender, System.EventArgs e)
{
try
{
TsCDaServer server = (TsCDaServer)m_server;
TsCDaItem[] items = new TsCDaItem[100];
for (int ii = 0; ii < items.Length; ii++)
{
items[ii] = new TsCDaItem();
items[ii].ItemName = "Static/ArrayTypes/Object[]";
items[ii].ItemPath = "DA30";
items[ii].ClientHandle = ii;
}
TsCDaSubscriptionState state = new TsCDaSubscriptionState();
state.Active = true;
state.UpdateRate = 1000;
ITsCDaSubscription subscription = server.CreateSubscription(state);
Thread.Sleep(100);
TsCDaItemResult[] results = subscription.AddItems(items);
Thread.Sleep(100);
subscription.RemoveItems(results);
Thread.Sleep(100);
server.CancelSubscription(subscription);
Thread.Sleep(100);
}
catch (Exception exception)
{
MessageBox.Show(exception.Message);
}
}