/// <summary>
/// Add new IDataViewModel to DataCollection
/// Set Previous and Next items
/// Set IsChecked = true if element is first in the collection
/// </summary>
private void AddDataItem(IOrderItemViewModel dataItem)
{
if (DataCollection == null)
{
DataCollection = new ObservableCollection <IOrderItemViewModel>();
}
var previousItem = DataCollection.LastOrDefault();
if (previousItem != null)
{
previousItem.SetNextData(dataItem);
dataItem.SetPreviousData(previousItem);
}
else
{
dataItem.IsChecked = true;
}
DataCollection.Add(dataItem);
}
public void SetNextData(IOrderItemViewModel nextData)
{
_nextData = nextData;
}
public void SetPreviousData(IOrderItemViewModel previousData)
{
_previousData = previousData;
Year = _previousData.Year;
}
