IOrderedEnumerable<TElement>.CreateOrderedEnumerable<TKey> メソッド

定義

名前空間:

System.Linq

アセンブリ:

System.Linq.dll

アセンブリ:

System.Core.dll

アセンブリ:

netstandard.dll

キーに従って IOrderedEnumerable<TElement> の要素に対して後続の並べ替えを実行します。

public:
generic <typename TKey>
 System::Linq::IOrderedEnumerable<TElement> ^ CreateOrderedEnumerable(Func<TElement, TKey> ^ keySelector, System::Collections::Generic::IComparer<TKey> ^ comparer, bool descending);

public System.Linq.IOrderedEnumerable<TElement> CreateOrderedEnumerable<TKey> (Func<TElement,TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer, bool descending);

public System.Linq.IOrderedEnumerable<out TElement> CreateOrderedEnumerable<TKey> (Func<out TElement,TKey> keySelector, System.Collections.Generic.IComparer<TKey>? comparer, bool descending);

public System.Linq.IOrderedEnumerable<out TElement> CreateOrderedEnumerable<TKey> (Func<out TElement,TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer, bool descending);

abstract member CreateOrderedEnumerable : Func<'Element, 'Key> * System.Collections.Generic.IComparer<'Key> * bool -> System.Linq.IOrderedEnumerable<'Element>

Public Function CreateOrderedEnumerable(Of TKey) (keySelector As Func(Of TElement, TKey), comparer As IComparer(Of TKey), descending As Boolean) As IOrderedEnumerable(Of TElement)

Public Function CreateOrderedEnumerable(Of TKey) (keySelector As Func(Of Out TElement, TKey), comparer As IComparer(Of TKey), descending As Boolean) As IOrderedEnumerable(Of Out TElement)

型パラメーター

TKey

keySelector によって生成されるキーの型。

パラメーター

keySelector

Func<TElement,TKey>

各要素のキーの抽出に使用される Func<T,TResult>。

comparer

IComparer<TKey>

返されたシーケンスでの配置用のキーの比較に使用される IComparer<T>。

descending

Boolean

要素を降順に並べ替える true、要素を昇順に並べ替える false。

戻り値

IOrderedEnumerable<TElement>

要素がキーに従って並べ替えられている IOrderedEnumerable<TElement>。

例

次のコード例は、CreateOrderedEnumerableIOrderedEnumerable<TElement>.

// Create an array of strings to sort.
string[] fruits = { "apricot", "orange", "banana", "mango", "apple", "grape", "strawberry" };
// First sort the strings by their length.
IOrderedEnumerable<string> sortedFruits2 =
    fruits.OrderBy(fruit => fruit.Length);
// Secondarily sort the strings alphabetically, using the default comparer.
IOrderedEnumerable<string> sortedFruits3 =
    sortedFruits2.CreateOrderedEnumerable<string>(
        fruit => fruit,
        Comparer<string>.Default, false);

// Output the resulting sequence of strings.
foreach (string fruit in sortedFruits3)
    Console.WriteLine(fruit);

// This code produces the following output:
//
// apple
// grape
// mango
// banana
// orange
// apricot
// strawberry

' Create an array of strings to sort.
Dim fruits() As String = {"apricot", "orange", "banana", "mango", "apple", "grape", "strawberry"}
' First sort the strings by their length.
Dim sortedFruits2 As IOrderedEnumerable(Of String) = _
    fruits.OrderBy(Function(ByVal fruit) fruit.Length)
' Secondarily sort the strings alphabetically, using the default comparer.
Dim sortedFruits3 As IOrderedEnumerable(Of String) = _
    sortedFruits2.CreateOrderedEnumerable(Of String)( _
        Function(ByVal fruit) fruit, _
        System.Collections.Generic.Comparer(Of String).Default, _
        False)

Dim output As New System.Text.StringBuilder
' Output the resulting sequence of strings.
For Each fruit As String In sortedFruits3
    output.AppendLine(fruit)
Next

' Display the results.
MsgBox(output.ToString())

' This code produces the following output:
'
' apple
' grape
' mango
' banana
' orange
' apricot
' strawberry

注釈

このメソッドによって提供される機能は、次のものであるかtrue descending false、またはThenByDescendingによって提供ThenByされるかによって異なります。 どちらも、既に並べ替えられた型のシーケンスの下位の順序付けを実行します IOrderedEnumerable<TElement>。