private void RemoveCategory()
{
// Remove from database
if (SelectedCategory == null)
{
MessageBox.Show("Please select a category.", "No category selected", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
if (SelectedCategory.Children.Any())
{
MessageBox.Show("Please remove child categories first.", "Remove child category", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
if (SelectedCategory.GetAchievements().Any())
{
MessageBox.Show("Please remove achievements first.", "Remove achievements", MessageBoxButton.OK, MessageBoxImage.Warning);
return;
}
categoryDM.Remove(SelectedCategory);
// Update locations
IEnumerable <Category> categories = GetCategoryParentChildrenSafe(SelectedCategory);
categoryDM.DecreaseLocations(categories, SelectedCategory.Location + 1);
// Refresh view and select the parent category
var selectedCategory = SelectedCategory;
RefreshCategoriesView();
if (selectedCategory.Parent != null)
{
SelectedCategory = Categories.Find(selectedCategory.Parent.ID);
}
}