private void StopListeningForGetDescriptionsData(IFieldDescriptionProvider filedDescriptionProvider)
{
if (filedDescriptionProvider != null)
{
filedDescriptionProvider.GetDescriptionsDataAsyncCompleted -= this.FieldDescriptionsProvider_GetDescriptionsDataAsyncCompleted;
}
}
internal DataProviderBase(IDataSettings settings, IFieldDescriptionProvider fieldInfoProvider)
{
this.Settings = settings;
this.Settings.SettingsChanged += this.OnDataSettingsChanged;
this.Settings.PropertyChanged += this.OnDataSettingsPropertyChanged;
this.Status = DataProviderStatus.Uninitialized;
this.fieldDescriptionsProvider = fieldInfoProvider;
}
/// <summary>
/// Called when FieldDescriptionsProvider is changed.
/// </summary>
internal virtual void OnFieldDescriptionsProviderChanged(IFieldDescriptionProvider oldProvider, IFieldDescriptionProvider newProvider)
{
this.OnPropertyChanged(nameof(FieldDescriptionsProvider));
if (this.deferLevel == 0 && !this.deferUpdates)
{
this.Refresh();
}
}
protected void ResetFieldDescriptionsProvider()
{
this.fieldDescriptionsProvider = null;
}
internal LocalDataSourceProvider(DataSettings <PropertyFilterDescriptionBase, PropertyGroupDescriptionBase, PropertyAggregateDescriptionBase, SortDescription> settings, IDataEngine engine, IFieldDescriptionProvider fieldInfoProvider) : base(settings, fieldInfoProvider)
{
this.settings = settings;
if (engine != null)
{
this.engine = engine;
this.engine.Completed += new EventHandler <DataEngineCompletedEventArgs>(this.OnCompleted);
}
}
internal LocalDataSourceProvider(IDataEngine engine, IFieldDescriptionProvider fieldInfoProvider) : this(new DataSettings <PropertyFilterDescriptionBase, PropertyGroupDescriptionBase, PropertyAggregateDescriptionBase, SortDescription>(), engine, fieldInfoProvider)
{
}
