Array.ConvertAll(TInput[], Converter<TInput,TOutput>) Array.ConvertAll(TInput[], Converter<TInput,TOutput>) Array.ConvertAll(TInput[], Converter<TInput,TOutput>) Array.ConvertAll(TInput[], Converter<TInput,TOutput>) Method

Definizione

Converte una matrice di un tipo in una matrice di un altro tipo.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()

Parametri di tipo

TInput

Tipo degli elementi della matrice di origine.The type of the elements of the source array.

TOutput

Tipo degli elementi della matrice di destinazione.The type of the elements of the target array.

Parametri

array
TInput[]

Oggetto Array unidimensionale in base zero da convertire in un tipo di destinazione.The one-dimensional, zero-based Array to convert to a target type.

converter
Converter<TInput,TOutput> Converter<TInput,TOutput> Converter<TInput,TOutput> Converter<TInput,TOutput>

Oggetto Converter<TInput,TOutput> che converte ogni elemento da un tipo a un altro.A Converter<TInput,TOutput> that converts each element from one type to another type.

Restituisce

TOutput[]

Matrice del tipo di destinazione contenente gli elementi convertiti dalla matrice di origine.An array of the target type containing the converted elements from the source array.

Eccezioni

array è null.array is null.

In alternativa-or- converter è null.converter is null.

Esempi

Nell'esempio di codice seguente viene definito un PointFToPoint metodo denominato che PointF converte una struttura Point in una struttura.The following code example defines a method named PointFToPoint that converts a PointF structure to a Point structure. Nell'esempio viene quindi creata una matrice PointF di strutture, viene Converter<PointF, Point> creato unConverter(Of PointF, Point) delegato (in Visual Basic) per PointFToPoint rappresentare il metodo e il delegato viene passato ConvertAll al metodo.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. Il ConvertAll metodo passa ogni elemento dell'elenco di input PointFToPoint al metodo e inserisce gli elementi convertiti in un nuovo elenco di Point strutture.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. Vengono visualizzati entrambi gli elenchi.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}

Commenti

Converter<TInput,TOutput> È un delegato di un metodo che converte un oggetto nel tipo di destinazione.The Converter<TInput,TOutput> is a delegate to a method that converts an object to the target type. Gli elementi di array vengono passati singolarmente Converter<TInput,TOutput>a e gli elementi convertiti vengono salvati nella nuova matrice.The elements of array are individually passed to the Converter<TInput,TOutput>, and the converted elements are saved in the new array.

L'origine array resta invariata.The source array remains unchanged.

Questo metodo è un'operazione On(), dove n è l' Length oggetto arraydi.This method is an O(n) operation, where n is the Length of array.

Si applica a

Vedi anche