Enumerable.Reverse(IEnumerable<TSource>) Enumerable.Reverse(IEnumerable<TSource>) Enumerable.Reverse(IEnumerable<TSource>) Enumerable.Reverse(IEnumerable<TSource>) Method

定義

反轉序列中項目的順序。Inverts the order of the elements in a sequence.

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

類型參數

TSource

source 項目的類型。The type of the elements of source.

參數

source
IEnumerable<TSource>

要反轉方向的值序列。A sequence of values to reverse.

傳回

IEnumerable<TSource>

其項目對應於輸入序列中反向排序之項目的序列。A sequence whose elements correspond to those of the input sequence in reverse order.

例外狀況

範例

下列程式碼範例示範如何使用Reverse反轉陣列中項目的順序。The following code example demonstrates how to use Reverse to reverse the order of elements in an array.

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

char[] reversed = apple.Reverse().ToArray();

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

/*
 This code produces the following output:

 e l p p a
*/
' Create a List of Char values.
Dim appleLetters As New List(Of Char)(New Char() _
                                  {"a"c, "P"c, "P"c, "L"c, "E"c})

' Reverse the order of the elements in the list.
' (We have to call AsEnumerable() in order to
' use System.Linq.Enumerable's Reverse() method.
Dim reversed() As Char =
appleLetters.AsEnumerable().Reverse().ToArray()

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

備註

實作這個方法是使用延後的執行。This method is implemented by using deferred execution. 立即傳回值是儲存,才能執行此動作的所有資訊的物件。The immediate return value is an object that stores all the information that is required to perform the action. 這個方法所表示的查詢不會執行直到列舉物件可以藉由呼叫其GetEnumerator方法直接或透過foreachVisual C# 中或For EachVisual Basic 中。The query represented by this method is not executed until the object is enumerated either by calling its GetEnumerator method directly or by using foreach in Visual C# or For Each in Visual Basic.

不同於OrderBy,這個排序方法不會考慮中的實際值自行決定的順序。Unlike OrderBy, this sorting method does not consider the actual values themselves in determining the order. 相反地,它只會傳回項目依相反順序從中產生基礎來源。Rather, it just returns the elements in the reverse order from which they are produced by the underlying source.

適用於