public class QueryableCollectionView : CollectionViewAdv, ICollectionViewAdv, ICollectionView, IEnumerable, INotifyCollectionChanged, INotifyPropertyChanged, ISupportInitialize, IDisposable, IPropertyChangedEventHandler, IEditableCollectionView, ISupportIncrementalLoading, IUnboundExpressionFunc, IGridViewNotifier, IFilterExt, IParallelizableView

Constructors

QueryableCollectionView()

Initializes a new instance of the QueryableCollectionView class.

Declaration

public QueryableCollectionView()

QueryableCollectionView(IEnumerable)

Initializes a new instance of the QueryableCollectionView class.

Declaration

public QueryableCollectionView(IEnumerable source)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source	The IEnumerable source of the collection view.

QueryableCollectionView(IEnumerable, Type)

Initializes a new instance of the QueryableCollectionView class.

Declaration

public QueryableCollectionView(IEnumerable source, Type sourceType)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source	The IEnumerable source of the collection view.
System.Type	sourceType	The source type.

Properties

RowFilter

Gets or sets the predicate for the row filter.

Declaration

public Predicate<object> RowFilter { get; set; }

Property Value

Type	Description
System.Predicate<System.Object>	The predicate for the row filter.

UsePLINQ

Gets or sets a value indicating whether to use PLINQ.

Declaration

public bool UsePLINQ { get; set; }

Property Value

Type	Description
System.Boolean	True if PLINQ is used, otherwise false.

ViewSource

Gets the queryable collection for the source of the collection view.

Declaration

public IQueryable ViewSource { get; }

Property Value

Type	Description
System.Linq.IQueryable	The queryable collection for the source of the collection view.

Methods

CanExecuteParallel(DataOperation)

Invokes to check whether source is need to execute execute in Parallel Query.

Declaration

protected virtual bool CanExecuteParallel(DataOperation operation)

Parameters

Type	Name	Description
DataOperation	operation	DataOperation

Returns

Type	Description
System.Boolean	Returns true if source is execute in parallel query

CreateRecords()

Creates the records for the items in the ViewSource.

Declaration

protected override RecordsList CreateRecords()

Returns

Type	Description
RecordsList	The list of records created for the items in the ViewSource.

Overrides

CollectionViewAdv.CreateRecords()

CreateRowFilterPredicate()

Creates a row filter predicate, which filters the items to be displayed in the view.

Declaration

protected virtual void CreateRowFilterPredicate()

FilterRecord(Object)

Returns a boolean value indicating whether to filter underlying data from adding it to View.Records collection.

Declaration

public override bool FilterRecord(object record)

Parameters

Type	Name	Description
System.Object	record	The record to filter.

Returns

Type	Description
System.Boolean	A boolean value indicating whether to filter underlying data from adding it to View.Records collection.

Overrides

CollectionViewAdv.FilterRecord(Object)

GetGroupResult(String[])

Gets the IEnumerable collection of group result for the array of group-by.

Declaration

protected override IEnumerable<GroupResult> GetGroupResult(string[] groupBy)

Parameters

Type	Name	Description
System.String[]	groupBy	The array of groups

Returns

Type	Description
System.Collections.Generic.IEnumerable<GroupResult>	The IEnumerable collection of group result for the array of group-by.

Overrides

CollectionViewAdv.GetGroupResult(String[])

GetPredicateExpression(IQueryable, out ParameterExpression)

Gets the predicate expression for the given source and parameter expression.

Declaration

public virtual Expression GetPredicateExpression(IQueryable source, out ParameterExpression parameterExpression)

Parameters

Type	Name	Description
System.Linq.IQueryable	source	The IQueryable source
System.Linq.Expressions.ParameterExpression	parameterExpression	The parameter expression.

Returns

Type	Description
System.Linq.Expressions.Expression	The predicate expression for the given source and parameter expression.

GetPredicateExpression(IQueryable, out ParameterExpression, String, Boolean)

Declaration

public Expression GetPredicateExpression(IQueryable source, out ParameterExpression parameterExpression, string columnName, bool returncolExpression)

Parameters

Type	Name	Description
System.Linq.IQueryable	source	The IQueryable source.
System.Linq.Expressions.ParameterExpression	parameterExpression	The parameter expression.
System.String	columnName	The column name.
System.Boolean	returncolExpression	A boolean value indicating whether to return the column expression.

Returns

Type	Description
System.Linq.Expressions.Expression	The predicate expression for the given values.

GetQueryableSource()

Returns the IQueryable source of the collection view.

Declaration

protected virtual IQueryable GetQueryableSource()

Returns

Type	Description
System.Linq.IQueryable	The IQueryable source of the collection view.

Remarks

PagedCollectionView returns paged source as IQueryable. Returning query will be sorted query in the case of normal VirtualizingCollectionView. It will be sorted and filtered query in the case of PagedCollectionVeiw and OnDemand VirtualizingCollectionView.

OnSortDescriptionChanged(NotifyCollectionChangedEventArgs)

This method fires when the sort description collection is changed.

Declaration

protected override void OnSortDescriptionChanged(NotifyCollectionChangedEventArgs e)

Parameters

Type	Name	Description
System.Collections.Specialized.NotifyCollectionChangedEventArgs	e	The System.Collections.Specialized.NotifyCollectionChangedEventArgs representing the data for the event.

Overrides

CollectionViewAdv.OnSortDescriptionChanged(NotifyCollectionChangedEventArgs)

RefreshFilter(Boolean)

Refreshes the view when the filtering is applied through FilterRecord(Object) delegate.

Declaration

public override void RefreshFilter(bool isProgrammatic = false)

Parameters

Type	Name	Description
System.Boolean	isProgrammatic	A boolean value indicating whether filtering is done programmatically.

Overrides

CollectionViewAdv.RefreshFilter(Boolean)

RefreshSort()

Refreshes sorting in the view.

Declaration

protected override void RefreshSort()

Overrides

CollectionViewAdv.RefreshSort()

RefreshSortingOrderWithFiltersForBottomLevel(List<Group>)

Refreshes the sorting order with filters on the records in the bottom-level group.

Declaration

protected virtual void RefreshSortingOrderWithFiltersForBottomLevel(List<Group> groups)

Parameters

Type	Name	Description
System.Collections.Generic.List<Group>	groups	The list of groups in the view.

ResetFilter()

Resets the filter of the collection view.

Declaration

protected override void ResetFilter()

Overrides

CollectionViewAdv.ResetFilter()

SortQueryable(IQueryable, SortDescriptionCollection)

Sets the given source and the sort fields as queryable.

Declaration

protected virtual IQueryable SortQueryable(IQueryable source, SortDescriptionCollection sortFields = null)

Parameters

Type	Name	Description
System.Linq.IQueryable	source	The IQueryable source of the items which has to be queried.
SortDescriptionCollection	sortFields	The sort fields of the source which has to be queried.