public void Detach()
{
if (!this.IsTracking)
{
throw new InvalidOperationException(Strings.DataServiceCollection_OperationForTrackedOnly);
}
if (!this.rootCollection)
{
throw new InvalidOperationException(Strings.DataServiceCollection_CannotStopTrackingChildCollection);
}
this.observer.StopTracking();
this.observer = null;
this.rootCollection = false;
}
private void StartTracking(
DataServiceContext context,
IEnumerable <T> items,
String entitySet,
Func <EntityChangedParams, bool> entityChanged,
Func <EntityCollectionChangedParams, bool> collectionChanged)
{
Debug.Assert(context != null, "Must have a valid context to initialize.");
Debug.Assert(this.observer == null, "Must have no observer which implies Initialize should only be called once.");
if (items != null)
{
this.InternalLoadCollection(items);
}
this.observer = new BindingObserver(context, entityChanged, collectionChanged);
this.observer.StartTracking(this, entitySet);
this.rootCollection = true;
}
private void StartTracking(DataServiceContext context, IEnumerable <T> items, string entitySet, Func <EntityChangedParams, bool> entityChanged, Func <EntityCollectionChangedParams, bool> collectionChanged)
{
if (!BindingEntityInfo.IsEntityType(typeof(T), context.MaxProtocolVersion))
{
throw new ArgumentException(Strings.DataBinding_DataServiceCollectionArgumentMustHaveEntityType(typeof(T)));
}
this.observer = new BindingObserver(context, entityChanged, collectionChanged);
if (items != null)
{
try
{
this.InternalLoadCollection(items);
}
catch
{
this.observer = null;
throw;
}
}
this.observer.StartTracking <T>((DataServiceCollection <T>) this, entitySet);
this.rootCollection = true;
}
public BindingGraph(BindingObserver observer)
{
this.observer = observer;
this.graph = new Graph();
}