public BookItem GetItemByID(int?id)
{
BookItem res = FindItemByID(id);
if (res == null)
{
throw new ArgumentException("Item with id: " + id.Value + " was not found");
}
return(res);
}
public BookItem FindItemByID(Group group, int id)
{
foreach (BookItem item in group.Items)
{
if (item.ID == id)
{
return(item);
}
if (item is Group)
{
Group subGroup = (Group)item;
BookItem res = FindItemByID(subGroup, id);
if (res != null)
{
return(res);
}
}
}
return(null);
}
public void DeleteItem(BookItem item)
{
this.Items.Remove(item);
item.Parent = null;
}
public void AddItem(BookItem item)
{
this.Items.Add(item);
item.Parent = this;
}
public void DeleteItem(BookItem item)
{
item.Parent.DeleteItem(item);
Save();
}
public void DeleteItem(BookItem item)
{
this.Items.Remove(item);
item.Parent = null;
}
public void AddItem(BookItem item)
{
this.Items.Add(item);
item.Parent = this;
}
public void DeleteItem(BookItem item)
{
item.Parent.DeleteItem(item);
Save();
}