/// <summary>
/// Adds a new list. It is important to note that because there is no enforcement of
/// data consistency in the context, the app must understand the data and enforce it.
/// </summary>
/// <param name="modelList">The model list to add</param>
public void AddList(ModelList modelList)
{
// Extract the service entity from the model entity
DefaultScope.List newList = modelList.List;
// Simple argument checking
if (null == newList)
{
throw new ArgumentNullException("newList");
}
if (newList.ID == null)
{
throw new ArgumentNullException("List id is null");
}
// Do a LINQ query to verify that the list can be added. Current constraints
// are unique id and unique name.
DefaultScope.List existingList = (from s in context.ListCollection
where s.ID == newList.ID || s.Name == newList.Name
select s).FirstOrDefault();
if (existingList != default(List))
{
throw new ArgumentException("List with the same id already exists");
}
// Add the list to the context.
context.AddList(newList);
}
/// <summary>
/// Constructor which takes the parent list for a new item
/// </summary>
/// <param name="list">Parent list for an item</param>
public ModifyItemChildWindow(ModelList list)
{
InitializeComponent();
item = ContextModel.Instance.GetNewItem(list);
NewItem = true;
this.Loaded += new RoutedEventHandler(ItemModifyChildWindow_Loaded);
}
public ModifyListChildWindow(DefaultScope.List scopeList)
{
InitializeComponent();
list = ContextModel.Instance.GetList(scopeList);
NewList = true;
this.Loaded += new RoutedEventHandler(NewListChildWindow_Loaded);
}
/// <summary>
/// Gets a new model item for creating an item. Takes the
/// parent list
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public ModelItem GetNewItem(ModelList list)
{
// This method requires the parent list and the user id
// to ensure that referential integrity is maintained
Item item = new Item()
{
ID = Guid.NewGuid(),
UserID = UserID,
ListID = list.List.ID
};
return(new ModelItem(item, context));
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null)
{
return(null);
}
Model.ModelItem srcItem = value as Model.ModelItem;
if (srcItem != null)
{
return(srcItem.Item);
}
Model.ModelList srcList = value as Model.ModelList;
if (srcList != null)
{
return(srcList.List);
}
return(null);
}
/// <summary>
/// Gets a new model item for creating an item. Takes the
/// parent list
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public ModelItem GetNewItem(ModelList list)
{
// This method requires the parent list and the user id
// to ensure that referential integrity is maintained
Item item = new Item()
{
ID = Guid.NewGuid(),
UserID = UserID,
ListID = list.List.ID
};
return new ModelItem(item, context);
}
/// <summary>
/// Adds a new list. It is important to note that because there is no enforcement of
/// data consistency in the context, the app must understand the data and enforce it.
/// </summary>
/// <param name="modelList">The model list to add</param>
public void AddList(ModelList modelList)
{
// Extract the service entity from the model entity
DefaultScope.List newList = modelList.List;
// Simple argument checking
if (null == newList)
{
throw new ArgumentNullException("newList");
}
if (newList.ID == null)
{
throw new ArgumentNullException("List id is null");
}
// Do a LINQ query to verify that the list can be added. Current constraints
// are unique id and unique name.
DefaultScope.List existingList = (from s in context.ListCollection
where s.ID == newList.ID || s.Name == newList.Name
select s).FirstOrDefault();
if (existingList != default(List))
{
throw new ArgumentException("List with the same id already exists");
}
// Add the list to the context.
context.AddList(newList);
}
