ObservableGroupedCollectionExtensions.ElementAt<TKey,TValue> Method

Reference

Definition

Namespace:: CommunityToolkit.Common.Collections

Assembly:: CommunityToolkit.Common.dll

Package:: CommunityToolkit.Common v7.0.3

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Return the element at position index from the first group with key key.

public static TValue ElementAt<TKey,TValue> (this CommunityToolkit.Common.Collections.ObservableGroupedCollection<TKey,TValue> source, TKey key, int index);

static member ElementAt : CommunityToolkit.Common.Collections.ObservableGroupedCollection<'Key, 'Value> * 'Key * int -> 'Value

<Extension()>
Public Function ElementAt(Of TKey, TValue) (source As ObservableGroupedCollection(Of TKey, TValue), key As TKey, index As Integer) As TValue

Type Parameters

TKey

The type of the group key.

TValue

The type of the items in the collection.

Parameters

source: ObservableGroupedCollection<TKey,TValue>

The source ObservableGroupedCollection<TKey,TValue> instance.

key: TKey

The key of the group to query.

index: Int32

The index of the item from the targeted group.

Returns

TValue

The element.

Exceptions

InvalidOperationException

The target group does not exist.

ArgumentOutOfRangeException

index is less than zero or index is greater than the group elements' count.

Applies to

Share via