/// <summary>
/// Gets the list of all DVDs in the database, and uses it as source for the DataGrid.
/// </summary>
private void BindData()
{
if (_dataGridIsFiltered == false)
{
dataSource = new ObservableCollection <DVD>(BL_DVD.GetAll());
dataSource.CollectionChanged += DataSourceChanged;
grdDVDOverview.ItemsSource = dataSource;
grdDVDOverview.DataContext = dataSource;
}
else
{
filteredSource = new ObservableCollection <DVD>(BL_DVD.Filter(_filterText, _filterCategory));
filteredSource.CollectionChanged += DataSourceChanged;
grdDVDOverview.ItemsSource = filteredSource;
grdDVDOverview.DataContext = filteredSource;
}
}
/// <summary>
/// Changes the available stock and reserved amount for when a DVD is received back.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnReceiveDVD_Click(object sender, RoutedEventArgs e)
{
var obj = ((FrameworkElement)sender).DataContext as DVD;
lblError.Content = "";
if (obj.ReservedAmount >= 1)
{
obj.ReservedAmount -= 1;
BL_DVD.Save(obj);
BindData();
}
else
{
lblError.Content = $"No reserved DVD's ({obj.Name}) left to receive.";
}
}
/// <summary>
/// Changes the available stock and reserved amount for a reservation to be made.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnReservation_Click(object sender, RoutedEventArgs e)
{
var obj = ((FrameworkElement)sender).DataContext as DVD;
lblError.Content = "";
if (obj.ReservedAmount <= obj.Stock - 1)
{
obj.ReservedAmount += 1;
BL_DVD.Save(obj);
BindData();
}
else
{
lblError.Content = $"No available DVD's ({obj.Name}) for new reservations.";
}
}
/// <summary>
/// Saves the model of the DVD, after validating the input and opens a new DVD form
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSaveNewDVD_Click(object sender, RoutedEventArgs e)
{
try
{
if (Validate())
{
if (BL_DVD.Save(Model))
{
this.Content = new DVDForm();
}
}
}
catch (Exception)
{
MessageBox.Show("Saving the DVD was unsuccesful, please only enter valid data.", "Save unsuccesful", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
/// <summary>
/// Handles the editing of DVD's in the DataGrid.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void grdDVDOverview_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e)
{
DataGridRow _dgRow = e.Row;
var _changedValue = _dgRow.DataContext as DVD;
lblError.Content = "";
if (_changedValue.Stock >= _changedValue.ReservedAmount)
{
BL_DVD.Save(_changedValue);
}
else
{
_changedValue.Stock = _changedValue.ReservedAmount;
lblError.Content = $"Stock ({_changedValue.Name}) cannot be lower than the current Reserved Amount.";
}
BindData();
}
/// <summary>
/// Determines what has to happen when the collection of DVD changes.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DataSourceChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (DVD d in e.NewItems)
{
BL_DVD.Save(d);
}
break;
case NotifyCollectionChangedAction.Remove:
foreach (DVD d in e.OldItems)
{
BL_DVD.Delete(d);
}
break;
}
}
