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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()

Return Value

Type: System.Boolean
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

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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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