Queryable.Reverse(IQueryable<TSource>) Queryable.Reverse(IQueryable<TSource>) Queryable.Reverse(IQueryable<TSource>) Queryable.Reverse(IQueryable<TSource>) Method

定義

シーケンス内の要素の順序を反転させます。Inverts the order of the elements in a sequence.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IQueryable<TSource> ^ Reverse(System::Linq::IQueryable<TSource> ^ source);
public static System.Linq.IQueryable<TSource> Reverse<TSource> (this System.Linq.IQueryable<TSource> source);
static member Reverse : System.Linq.IQueryable<'Source> -> System.Linq.IQueryable<'Source>
<Extension()>
Public Function Reverse(Of TSource) (source As IQueryable(Of TSource)) As IQueryable(Of TSource)

型パラメーター

TSource

source の要素の型。The type of the elements of source.

パラメーター

source
IQueryable<TSource>

反転させる値のシーケンス。A sequence of values to reverse.

戻り値

IQueryable<TSource>

IQueryable<T>逆順で対応する入力シーケンスの要素。An IQueryable<T> whose elements correspond to those of the input sequence in reverse order.

例外

次のコード例は、使用する方法を示しますReverse<TSource>(IQueryable<TSource>)配列内の要素の順序を逆にします。The following code example demonstrates how to use Reverse<TSource>(IQueryable<TSource>) to reverse the order of elements in an array.

char[] apple = { 'a', 'p', 'p', 'l', 'e' };

// Reverse the order of the characters in the collection.
IQueryable<char> reversed = apple.AsQueryable().Reverse();

foreach (char chr in reversed)
    Console.Write(chr + " ");
Console.WriteLine();

/*
    This code produces the following output:

    e l p p a
*/

Dim appleLetters As New List(Of Char)(New Char() _
                                      {"a"c, "p"c, "p"c, "l"c, "e"c})

' Reverse the order of the characters in the collection.
Dim reversed As IQueryable(Of Char) = _
   appleLetters.AsQueryable().Reverse()

Dim output As New System.Text.StringBuilder
For Each chr As Char In reversed
    output.Append(chr & " ")
Next

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

' This code produces the following output:
'
' e l p p a 

注釈

Reverse<TSource>(IQueryable<TSource>)メソッドを生成、MethodCallExpression呼び出しを表すReverse<TSource>(IQueryable<TSource>)として構築されたジェネリック メソッド自体。The Reverse<TSource>(IQueryable<TSource>) method generates a MethodCallExpression that represents calling Reverse<TSource>(IQueryable<TSource>) itself as a constructed generic method. これは、後、渡します、MethodCallExpressionCreateQuery<TElement>(Expression)のメソッド、IQueryProviderによって表される、Providerのプロパティ、sourceパラメーター。It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source parameter.

呼び出し元を表す式ツリーを実行した結果として発生するクエリの動作Reverse<TSource>(IQueryable<TSource>)の型の実装によって異なります、sourceパラメーター。The query behavior that occurs as a result of executing an expression tree that represents calling Reverse<TSource>(IQueryable<TSource>) depends on the implementation of the type of the source parameter. 想定される動作は、要素の順序を反転させますsourceします。The expected behavior is that it reverses the order of the elements in source.

適用対象