C1VirtualDataCollection<T> Class

public abstract class C1VirtualDataCollection<T> : C1DataCollectionBase<T?>, IDataCollection<T?>, IReadOnlyList<T?>, IReadOnlyCollection<T?>, IEnumerable<T?>, IEnumerable, INotifyCollectionChanged, ISupportIndexing<T?>, INotifyPropertyChanged, IDisposable, ISupportVirtualization, ISupportRefreshing, ISupportConnection, ISupportAsyncLoading<T>, ISupportSorting, ISupportFiltering, ISupportEditing<T> where T : class?

Public MustInherit Class C1VirtualDataCollection(Of T As Class)
    Inherits C1DataCollectionBase(Of T)
    Implements IDataCollection(Of T), IReadOnlyList(Of T), IReadOnlyCollection(Of T), IEnumerable(Of T), IEnumerable, INotifyCollectionChanged, ISupportIndexing(Of T), INotifyPropertyChanged, IDisposable, ISupportVirtualization, ISupportRefreshing, ISupportConnection, ISupportAsyncLoading(Of T), ISupportSorting, ISupportFiltering, ISupportEditing(Of T)

Type Parameters

Name	Description
T

Remarks

Override GetPageAsync to provide the data.

Constructors

Name	Description
C1VirtualDataCollection(int, int, TimeSpan?)	Initializes a new instance of the C1VirtualDataCollection<T> class.

Properties

Name	Description
ConnectionState	Gets the state of the connection to the source.
Count	Gets the number of elements in the collection.
FilterExpression	Gets the filter expression applied to the data.
InternalList	Gets or sets the list that hold the items to be returned in the public api.
IsLoading	Gets whether the collection is getting the data.
IsVirtualizing	Gets whether the collection is virtualizing its data.
this[int]	Gets the element at the specified index in the read-only list.
Mode	Gets or sets the way the items will be loaded
PageSize	Gets or sets the number of items that will be fetch per page.
SortDescriptions	Gets the sort descriptions applied to the data.

Methods

Name	Description
CanFilter(FilterExpression?)	Returns whether the collection is able to filter the specified `filterExpression`.
CanInsert(int, T)	Determines whether a new item can be inserted in the collection at the specified `index`.
CanMove(int, int)	Determines whether the item at `fromIndex` can be moved to `toIndex`.
CanRefresh()	Determines whether the collection can be refreshed.
CanRemove(int)	Determines whether the item at the specified `index` can be removed from the collection.
CanReplace(int, T)	Determines whether the item at the specified `index` can be replaced in the collection.
CanSort(params SortDescription[])	Returns whether the collection is able to sort the specified `sortDescriptions`.
ConnectAsync(CancellationToken)	Connects the collection to the source.
ConnectAsyncOverride(CancellationToken)	When overridden, this method is used to initialize the collection.
DisconnectAsync(CancellationToken)	Invokes the finalization of the collection.
DisconnectAsyncOverride(CancellationToken)	When overridden, this method is used to finalize the collection.
FilterAsync(FilterExpression?, CancellationToken)	Filters the data using specified `filterExpression`.
GetLoadedItems()	Returns the items that has be loaded so far.
GetLoadedItems(int?, int?)	Returns all the items that has be loaded so far.
GetPageAsync(int, int, int, IReadOnlyList<SortDescription>?, FilterExpression?, CancellationToken)	When overridden in an inherited class it returns the items in the page as well as a token to the next page.
IndexOf(T?)	Gets the index of the specified item.
InsertAsync(int, T, CancellationToken)	Inserts the specified `item` at the specified `index` in the collection.
InsertAsyncOverride(int, T, CancellationToken)	This method is called when an item is inserted in the collection.
LoadAsync(int?, int?, CancellationToken)	Loads all the items between the specified range.
MoveAsync(int, int, CancellationToken)	Moves an item from the specified `fromIndex` to `toIndex`.
MoveAsyncOverride(int, int, CancellationToken)	This method is called when an item is moved in the collection.
OnFilterChanged()	Called after the filter changed.
OnResetting()	Called before the cache is reset.
OnSortChanged()	Called after the sort changed.
RefreshAsync(CancellationToken)	Removes the cached data and loads the whole collection from scratch.
RemoveAsync(int, CancellationToken)	Removes the item at the specified `index` from the collection.
RemoveAsyncOverride(int, CancellationToken)	This method is called when an item is removed from the collection.
ReplaceAsync(int, T, CancellationToken)	Replaces the item at the specified `index` by the specified `item`.
ReplaceAsyncOverride(int, T, CancellationToken)	This method is called when an item is replaced in the collection.
ResetCache(int)	Resets the internal cache.
SortAsync(params SortDescription[])	Sorts the collection according to the specified sort descriptions.
SortAsync(SortDescription[], CancellationToken)	Sorts the collection according to the specified sort descriptions.