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Type.IsArrayImpl Method

When overridden in a derived class, implements the IsArray property and determines whether the Type is an array.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

'Declaration
Protected MustOverride Function IsArrayImpl As Boolean
'Usage
Dim returnValue As Boolean

returnValue = Me.IsArrayImpl
protected abstract boolean IsArrayImpl ()
protected abstract function IsArrayImpl () : boolean
Not applicable.

Return Value

true if the Type is an array; otherwise, false.

An instance of the Array class must return false because it is an object, not an array.

The following example overrides the IsArrayImpl method in the MyTypeDelegator class, checks if a variable is an array, and displays the result.

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic
Public Class MyTypeDelegator
    Inherits TypeDelegator
    Public myElementType As String = Nothing
    Public myType As Type
    Public Sub New(ByVal myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub 'New
    ' Override IsArrayImpl().
    Protected Overrides Function IsArrayImpl() As Boolean
        ' Determine whether the type is an array.
        If myType.IsArray Then
            myElementType = "array"
            Return True
        End If
        ' Return false if the type is not an array.
        Return False
    End Function 'IsArrayImpl
End Class 'MyTypeDelegator

Public Class Type_IsArrayImpl
    Public Shared Sub Main()
        Try
            Dim myInt As Integer = 0
            ' Create an instance of an array element.
            Dim myArray(4) As Integer
            Dim myType As New MyTypeDelegator(myArray.GetType())
            Console.WriteLine(ControlChars.NewLine + "Determine whether the variable is an array." + ControlChars.NewLine)
            ' Determine whether 'myType' is an array type.  
            If myType.IsArray Then
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType)
            Else
                Console.WriteLine("myArray is not an array.")
            End If
            myType = New MyTypeDelegator(myInt.GetType())
            ' Determine whether myType is an array type. 
            If myType.IsArray Then
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType)
            Else
                Console.WriteLine("myInt is not an array.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub 'Main
End Class 'Type_IsArrayImpl

import System.*;
import System.Reflection.*;

public class MyTypeDelegator extends TypeDelegator
{
    public String myElementType = null;
    public Type myType;

    public MyTypeDelegator(Type myType)
    {
        super(myType);
        this.myType = myType;
    } //MyTypeDelegator

    // Override IsArrayImpl().
    protected boolean IsArrayImpl()
    {
        // Determine whether the type is an array.
        if (myType.get_IsArray()) {
            myElementType = "array";
            return true;
        }
        // Return false if the type is not an array.
        return false;
    } //IsArrayImpl
} //MyTypeDelegator

public class Type_IsArrayImpl
{
    public static void main(String[] args)
    {
        try {
            int myInt = 0;
            // Create an instance of an array element.
            int myArray[] = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            Console.WriteLine("\nDetermine whether the variable is an array.\n");
            // Determine whether myType is an array type.  
            if (myType.get_IsArray()) {
                Console.WriteLine("The type of myArray is {0}.", myType.
                    myElementType);
            }
            else {
                Console.WriteLine("myArray is not an array.");
            }
            myType = new MyTypeDelegator(((System.Int32)myInt).GetType());
            // Determine whether myType is an array type. 
            if (myType.get_IsArray()) {
                Console.WriteLine("The type of myInt is {0}.", myType.
                    myElementType);
            }
            else {
                Console.WriteLine("myInt is not an array.");
            }
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception: {0}", e.get_Message());
        }
    } //main
} //Type_IsArrayImpl

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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