Array.ConvertAll<TInput,TOutput>(TInput[], Converter<TInput,TOutput>) メソッド

定義

ある型の配列を別の型の配列に変換します。Converts an array of one type to an array of another type.

public:
generic <typename TInput, typename TOutput>
 static cli::array <TOutput> ^ ConvertAll(cli::array <TInput> ^ array, Converter<TInput, TOutput> ^ converter);
public static TOutput[] ConvertAll<TInput,TOutput> (TInput[] array, Converter<TInput,TOutput> converter);
static member ConvertAll : 'Input[] * Converter<'Input, 'Output> -> 'Output[]
Public Shared Function ConvertAll(Of TInput, TOutput) (array As TInput(), converter As Converter(Of TInput, TOutput)) As TOutput()

型パラメーター

TInput

元の配列要素の型。The type of the elements of the source array.

TOutput

変換後の配列要素の型。The type of the elements of the target array.

パラメーター

array
TInput[]

変換元となる、インデックス番号が 0 から始まる 1 次元 ArrayThe one-dimensional, zero-based Array to convert to a target type.

converter
Converter<TInput,TOutput>

各要素の型を変換するための Converter<TInput,TOutput>A Converter<TInput,TOutput> that converts each element from one type to another type.

戻り値

TOutput[]

要素の型を変換した後の配列。An array of the target type containing the converted elements from the source array.

例外

arraynull です。array is null.

または-or- converternull です。converter is null.

次のコード例では、PointF 構造体を Point 構造体に変換する PointFToPoint という名前のメソッドを定義します。The following code example defines a method named PointFToPoint that converts a PointF structure to a Point structure. 次に、PointF 構造体の配列を作成し、PointFToPoint メソッドを表す Converter<PointF, Point> デリゲート (Visual Basic でConverter(Of PointF, Point)) を作成し、そのデリゲートを ConvertAll メソッドに渡します。The example then creates an array of PointF structures, creates a Converter<PointF, Point> delegate (Converter(Of PointF, Point) in Visual Basic) to represent the PointFToPoint method, and passes the delegate to the ConvertAll method. ConvertAll メソッドは、入力リストの各要素を PointFToPoint メソッドに渡し、変換された要素を Point 構造体の新しいリストに格納します。The ConvertAll method passes each element of the input list to the PointFToPoint method and puts the converted elements into a new list of Point structures. 両方のリストが表示されます。Both lists are displayed.

#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Collections::Generic;

Point PointFToPoint(PointF pf)
{
    return Point((int) pf.X, (int) pf.Y);
};

void main()
{
    // Create an array of PointF objects.
    array<PointF>^ apf = {
        PointF(27.8F, 32.62F),
        PointF(99.3F, 147.273F),
        PointF(7.5F, 1412.2F) };


    // Display each element in the PointF array.
    Console::WriteLine();
    for each(PointF p in apf)
    {
        Console::WriteLine(p);
    }

    // Convert each PointF element to a Point object.
    array<Point>^ ap = 
        Array::ConvertAll(apf, 
            gcnew Converter<PointF, Point>(PointFToPoint)
        );

    // Display each element in the Point array.
    Console::WriteLine();
    for each(Point p in ap)
    {
        Console::WriteLine(p);
    }
}

/* This code example produces the following output:

{X=27.8, Y=32.62}
{X=99.3, Y=147.273}
{X=7.5, Y=1412.2}

{X=27,Y=32}
{X=99,Y=147}
{X=7,Y=1412}
 */
using System;
using System.Drawing;
using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        // Create an array of PointF objects.
        PointF[] apf = {
            new PointF(27.8F, 32.62F),
            new PointF(99.3F, 147.273F),
            new PointF(7.5F, 1412.2F) };

        // Display each element in the PointF array.
        Console.WriteLine();
        foreach( PointF p in apf )
            Console.WriteLine(p);

        // Convert each PointF element to a Point object.
        Point[] ap = Array.ConvertAll(apf, 
            new Converter<PointF, Point>(PointFToPoint));

        // Display each element in the Point array.
        Console.WriteLine();
        foreach( Point p in ap )
        {
            Console.WriteLine(p);
        }
    }

    public static Point PointFToPoint(PointF pf)
    {
        return new Point(((int) pf.X), ((int) pf.Y));
    }
}

/* This code example produces the following output:

{X=27.8, Y=32.62}
{X=99.3, Y=147.273}
{X=7.5, Y=1412.2}

{X=27,Y=32}
{X=99,Y=147}
{X=7,Y=1412}
 */
Imports System.Drawing
Imports System.Collections.Generic

Public Class Example
    Public Shared Sub Main()
        ' Create an array of PointF objects.
        Dim apf() As PointF = { _
            New PointF(27.8, 32.62), _
            New PointF(99.3, 147.273), _
            New PointF(7.5, 1412.2)  }

        ' Display each element in the PointF array.
        Console.WriteLine()
        For Each p As PointF In apf
            Console.WriteLine(p)
        Next
        
        ' Convert each PointF element to a Point object.
        Dim ap() As Point = Array.ConvertAll(apf, _
            New Converter(Of PointF, Point)(AddressOf PointFToPoint))

        ' Display each element in the Point array.
        Console.WriteLine()
        For Each p As Point In ap
            Console.WriteLine(p)
        Next
    End Sub

    Public Shared Function PointFToPoint(ByVal pf As PointF) _
        As Point

        Return New Point(CInt(pf.X), CInt(pf.Y))
    End Function
End Class
' The example produces the following output:
'       {X=27.8, Y=32.62}
'       {X=99.3, Y=147.273}
'       {X=7.5, Y=1412.2}
'       
'       {X=28,Y=33}
'       {X=99,Y=147}
'       {X=8,Y=1412}

注釈

Converter<TInput,TOutput> は、オブジェクトを対象の型に変換するメソッドへのデリゲートです。The Converter<TInput,TOutput> is a delegate to a method that converts an object to the target type. array の要素は、個別に Converter<TInput,TOutput>に渡され、変換された要素は新しい配列に保存されます。The elements of array are individually passed to the Converter<TInput,TOutput>, and the converted elements are saved in the new array.

ソース array は変更されません。The source array remains unchanged.

このメソッドは O (n) 操作であり、narrayLength です。This method is an O(n) operation, where n is the Length of array.

適用対象

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