ObservableExtensionsObservableWhereT Method

Returns an observable collection of objects of type T that contains all items of the source collection that pass the filter. See ObservableFilteredCollectionT for details.

Namespace: TomsToolbox.ObservableCollections
Assembly: TomsToolbox.ObservableCollections (in TomsToolbox.ObservableCollections.dll)

Syntax

Copy

public static IObservableCollection<T> ObservableWhere<T>(
	this IList<T> source,
	Func<T, bool> predicate,
	params string[] liveTrackingProperties
)

<ExtensionAttribute>
Public Shared Function ObservableWhere(Of T) ( 
	source As IList(Of T),
	predicate As Func(Of T, Boolean),
	ParamArray liveTrackingProperties As String()
) As IObservableCollection(Of T)

Parameters

source: Type: System.Collections.GenericIListT
The source collection.
predicate: Type: SystemFuncT, Boolean
The predicate used to filter.
liveTrackingProperties: Type: SystemString
The live tracking properties. Whenever one of these properties in any item changes, the filter is reevaluated for the item.

Type Parameters

T: The type of the target elements.

Return Value

Type: IObservableCollectionT
The observable collection of objects of type T that contains the filtered items of the source collection.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IListT. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Remarks

See ObservableFilteredCollectionT for usage details.

Reference

ObservableExtensions Class