public bool TryRemove(T item)
{
RejectableArgs <T> eventObject = new RejectableArgs <T>(Operation.Remove, item, internalList.Count);
OnBeforeChangeEvent(eventObject);
if (eventObject.IsOperationRejected || internalList.IndexOf(item) < 0)
{
return(false);
}
internalList.Remove(item);
OnChangedEvent(new ListChangedEventArgs <T>(Operation.Remove, item, internalList.Count));
return(true);
}
public bool TryAdd(T item)
{
RejectableArgs <T> eventObject = new RejectableArgs <T>(Operation.Add, item, internalList.Count);
OnBeforeChangeEvent(eventObject);
if (eventObject.IsOperationRejected)
{
return(false);
}
internalList.Add(item);
OnChangedEvent(new ListChangedEventArgs <T>(Operation.Add, item, internalList.Count));
return(true);
}
public void Add(T item)
{
RejectableArgs <T> eventObject = new RejectableArgs <T>(Operation.Add, item, internalList.Count);
OnBeforeChangeEvent(eventObject);
if (item.ToString().Trim().Length < 1)
{
throw new InvalidOperationException();
}
if (eventObject.IsOperationRejected)
{
throw new OperationRejectedException(String.Format("Failed to {0} item '{1}'.", eventObject.Operation, eventObject.Value));
}
internalList.Add(item);
OnChangedEvent(new ListChangedEventArgs <T>(Operation.Add, item, internalList.Count));
}
public void Remove(T item)
{
RejectableArgs <T> eventObject = new RejectableArgs <T>(Operation.Remove, item, internalList.Count);
OnBeforeChangeEvent(eventObject);
if (internalList.IndexOf(item) < 0)
{
throw new InvalidOperationException();
}
else if (eventObject.IsOperationRejected)
{
throw new OperationRejectedException(String.Format("Failed to {0} item '{1}'.", eventObject.Operation, eventObject.Value));
}
internalList.Remove(item);
OnChangedEvent(new ListChangedEventArgs <T>(Operation.Remove, item, internalList.Count));
}
private void OnBeforeChangeEvent(RejectableArgs <T> rejectableEventArgs) => BeforeChange?.Invoke(this, rejectableEventArgs);