Click to Rate and Give Feedback
MSDN
MSDN Library
.NET Development
.NET Framework 3.5
System Namespace
Array Class
Array Methods
 ConvertAll(TInput, TOutput) Method
Collapse All/Expand All Collapse All
This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
Array..::.ConvertAll<(Of <(TInput, TOutput>)>) Method

Converts an array of one type to an array of another type.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function ConvertAll(Of TInput, TOutput) ( _
    array As TInput(), _
    converter As Converter(Of TInput, TOutput) _
) As TOutput()
Visual Basic (Usage)
Dim array As TInput()
Dim converter As Converter(Of TInput, TOutput)
Dim returnValue As TOutput()

returnValue = Array.ConvertAll(array, _
    converter)
C#
public static TOutput[] ConvertAll<TInput, TOutput>(
    TInput[] array,
    Converter<TInput, TOutput> converter
)
Visual C++
public:
generic<typename TInput, typename TOutput>
static array<TOutput>^ ConvertAll(
    array<TInput>^ array, 
    Converter<TInput, TOutput>^ converter
)
JScript
JScript does not support generic types or methods.

Type Parameters

TInput

The type of the elements of the source array.

TOutput

The type of the elements of the target array.

Parameters

array
Type: array<TInput>[]()[]
The one-dimensional, zero-based Array to convert to a target type.
converter
Type: System..::.Converter<(Of <(TInput, TOutput>)>)
A Converter<(Of <(TInput, TOutput>)>) that converts each element from one type to another type.

Return Value

Type: array<TOutput>[]()[]
An array of the target type containing the converted elements from the source array.
ExceptionCondition
ArgumentNullException

array is nullNothingnullptra null reference (Nothing in Visual Basic).

-or-

converter is nullNothingnullptra null reference (Nothing in Visual Basic).

The Converter<(Of <(TInput, TOutput>)>) is a delegate to a method that converts an object to the target type. The elements of array are individually passed to the Converter<(Of <(TInput, TOutput>)>), and the converted elements are saved in the new array.

The source array remains unchanged.

This method is an O(n) operation, where n is the Length of array.

The following code example defines a method named PointFToPoint that converts a PointF structure to a Point structure. 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<(Of <(TInput, TOutput>)>) method. The ConvertAll<(Of <(TInput, TOutput>)>) method passes each element of the input list to the PointFToPoint method and puts the converted elements into a new list of Point structures. Both lists are displayed.

Visual Basic
Imports System
Imports System.Drawing
Imports System.Collections.Generic

Public Class Example

    Public Shared Sub Main()

        Dim apf() As PointF = { _
            New PointF(27.8, 32.62), _
            New PointF(99.3, 147.273), _
            New PointF(7.5, 1412.2)  }

        Console.WriteLine()
        For Each p As PointF In apf
            Console.WriteLine(p)
        Next

        Dim ap() As Point = Array.ConvertAll(apf, _
            New Converter(Of PointF, Point)(AddressOf PointFToPoint))

        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

' 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=28,Y=33}
'{X=99,Y=147}
'{X=8,Y=1412}
C#
using System;
using System.Drawing;
using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        PointF[] apf = {
            new PointF(27.8F, 32.62F),
            new PointF(99.3F, 147.273F),
            new PointF(7.5F, 1412.2F) };

        Console.WriteLine();
        foreach( PointF p in apf )
        {
            Console.WriteLine(p);
        }

        Point[] ap = Array.ConvertAll(apf, 
            new Converter<PointF, Point>(PointFToPoint));

        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}
 */
Visual C++
#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()
{
    array<PointF>^ apf = {
        PointF(27.8F, 32.62F),
        PointF(99.3F, 147.273F),
        PointF(7.5F, 1412.2F) };

    Console::WriteLine();
    for each(PointF p in apf)
    {
        Console::WriteLine(p);
    }

    array<Point>^ ap = 
        Array::ConvertAll(apf, 
            gcnew Converter<PointF, Point>(PointFToPoint)
        );

    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}
 */

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
Tags What's this?: Add a tag
Community Content   What is Community Content?
Add new content RSS  Annotations
Processing
© 2009 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks | Privacy Statement | Site Feedback
Page view tracker