private async Task QuerySubscriptions()
{
if (subscriptionPage == 1)
{
if (SubscriptionItems == null)
{
SubscriptionItems = new ObservableCollection <SubscriptionItem>();
}
else
{
SubscriptionItems.Clear();
}
}
UserContentProvider user = new UserContentProvider();
List <Subscription> reuslt = await user.QuerySubscription(subscriptionPage, currentUserId, GlobalValue.CurrentUserContext.UserId, GlobalValue.CurrentUserContext.MobileToken);
reuslt.ForEach(x => SubscriptionItems.Add(ConvertToSubscriptionItem(x)));
subscriptionPage++;
if (SubscriptionItems.Count <= 10 && subscriptionPage == 2)
{
await QuerySubscriptions();
}
}
private async void ExecuteSubscriptionCommand(int id)
{
SubscriptionItem value = SubscriptionItems.First(x => x.Id == id);
if (value.IsSubscribed)
{
UserContentProvider user = new UserContentProvider();
DiscoverSubscribeResult reuslt = await user.Unsubscribe(id, GlobalValue.CurrentUserContext.UserId, GlobalValue.CurrentUserContext.MobileToken);
if (reuslt.Error == null || reuslt.Error.Count == 0)
{
value.IsSubscribed = false;
}
}
else
{
UserContentProvider user = new UserContentProvider();
DiscoverSubscribeResult reuslt = await user.Subscribe(id, GlobalValue.CurrentUserContext.UserId, GlobalValue.CurrentUserContext.MobileToken);
if (reuslt.Error == null || reuslt.Error.Count == 0)
{
value.IsSubscribed = true;
}
}
}
public dynamic ToObjects()
{
if (Shippings.Count > 0 && Metadatas.Count > 0)
{
return(new
{
items = SubscriptionItems.Select(x => x.ToObject()),
shippings = Shippings.Select(x => x.ToObject()),
metadata = Metadatas.Select(x => x.ToObject())
});
}
if (Shippings.Count > 0)
{
return(new
{
items = SubscriptionItems.Select(x => x.ToObject()),
shippings = Shippings.Select(x => x.ToObject())
});
}
if (Metadatas.Count > 0)
{
return(new
{
items = SubscriptionItems.Select(x => x.ToObject()),
metadata = Metadatas.Select(x => x.ToObject())
});
}
return(new
{
items = SubscriptionItems.Select(x => x.ToObject())
});
}
/// <summary>
/// Open a dialog to display and edit a list of the subscription item objects.
/// </summary>
internal void EditItems()
{
try
{
SubscriptionItems myItems = new SubscriptionItems(this);
// edit the items.
OpcDa::Item[] modifiedItems;
using (ItemListEditDlg dial = new ItemListEditDlg())
{
modifiedItems = dial.ShowDialog(myItems.Items, false, false);
if (dial.DialogResult != DialogResult.OK || modifiedItems == null)
{
return;
}
}
if (Tag != null)
{
// separate the items in lists depending on whether item id changed.
ArrayList insertItems = new ArrayList();
ArrayList updateItems = new ArrayList();
ArrayList deleteItems = new ArrayList();
// save item ids to detect item id changes.
Opc.ItemIdentifier[] itemIDs = myItems.CreateIdentifiers;
for (int ii = 0; ii < itemIDs.Length; ii++)
{
if (modifiedItems[ii].Key != itemIDs[ii].Key)
{
insertItems.Add(modifiedItems[ii]);
deleteItems.Add(itemIDs[ii]);
}
else
{
updateItems.Add(modifiedItems[ii]);
}
}
Tag.SetResultFilters((int)OpcDa.ResultFilter.All);
// delete old items.
if (deleteItems.Count > 0)
{
Tag.RemoveItems((Opc.ItemIdentifier[])deleteItems.ToArray(typeof(Opc.ItemIdentifier)));
}
// update existing items.
if (updateItems.Count > 0)
{
myItems.MatchChildren(Tag.ModifyItems((int)OpcDa::StateMask.All, (OpcDa::Item[])updateItems.ToArray(typeof(OpcDa::Item))));
}
// insert new items.
if (insertItems.Count > 0)
{
myItems.MatchChildren(Tag.AddItems((OpcDa::Item[])insertItems.ToArray(typeof(OpcDa::Item))));
}
}
}
catch (Exception exp)
{
MessageBox.Show(exp.Message, "Edit Items", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// Create subscription at the server.
/// </summary>
internal void Subscribe()
{
try
{
State.ClientHandle = Guid.NewGuid();
Tag = (Subscription)FindServer().CreateSubscription(State);
SubscriptionItems myItems = new SubscriptionItems(this);
//force to set subscription state
Tag.SetResultFilters((int)OpcDa.ResultFilter.All);
myItems.MatchChildren(Tag.AddItems(myItems.Items));
Subscription.RaiseSubscriptionModified(Tag, false);
}
catch (Exception ex) { MessageBox.Show(ex.Message, "Subscribe", MessageBoxButtons.OK, MessageBoxIcon.Error); }
finally { AssignImageIndex(); }
}
