Type.IsPointer Properti

public:
 virtual property bool IsPointer { bool get(); };

public:
 property bool IsPointer { bool get(); };

public virtual bool IsPointer { get; }

public bool IsPointer { get; }

member this.IsPointer : bool

Public Overridable ReadOnly Property IsPointer As Boolean

Public ReadOnly Property IsPointer As Boolean

Nilai Properti

true Type jika adalah pointer; jika tidak, false.

Penerapan

Contoh

Contoh berikut menunjukkan penggunaan IsPointer properti.

using System;
using System.Reflection;
public class MyTypeDelegator : TypeDelegator
{
    public string myElementType = null;
    private Type myType = null ;
    public MyTypeDelegator(Type myType) : base(myType)
    {
        this.myType = myType;
    }
    // Override Type.HasElementTypeImpl().
    protected override bool HasElementTypeImpl()
    {
        // Determine whether the type is an array.
        if(myType.IsArray)
        {
            myElementType = "array";
            return true;
        }
        // Determine whether the type is a reference.
        if(myType.IsByRef)
        {
            myElementType = "reference";
            return true;
        }
        // Determine whether the type is a pointer.
        if(myType.IsPointer)
        {
            myElementType = "pointer";
            return true;
        }
        // Return false if the type is not a reference, array, or pointer type.
        return false;
    }
}
public class Type_HasElementTypeImpl
{
    public static void Main()
    {
        try
        {
            int myInt = 0 ;
            int[] myArray = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            // Determine whether myType is an array, pointer, reference type.
            Console.WriteLine("\nDetermine whether a variable is an array, pointer, or reference type.\n");
            if( myType.HasElementType)
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType);
            else
                Console.WriteLine("myArray is not an array, pointer, or reference type.");
            myType = new MyTypeDelegator(myInt.GetType());
            // Determine whether myType is an array, pointer, reference type.
            if( myType.HasElementType)
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType);
            else
                Console.WriteLine("myInt is not an array, pointer, or reference type.");
        }
        catch( Exception e )
        {
            Console.WriteLine("Exception: {0}", e.Message);
        }
    }
}

open System.Reflection

type MyTypeDelegator(myType) =
    inherit TypeDelegator(myType)
    
    [<DefaultValue>]
    val mutable public myElementType: string
    
    // Override Type.HasElementTypeImpl().
    override this.HasElementTypeImpl() =
        // Determine whether the type is an array.
        if myType.IsArray then
            this.myElementType <- "array"
            true
        // Determine whether the type is a reference.
        elif myType.IsByRef then
            this.myElementType <- "reference"
            true
        // Determine whether the type is a pointer.
        elif myType.IsPointer then
            this.myElementType <- "pointer"
            true
        // Return false if the type is not a reference, array, or pointer type.
        else false

try
    let myInt = 0 
    let myArray = Array.zeroCreate<int> 5
    let myType = MyTypeDelegator(myArray.GetType())
    // Determine whether myType is an array, pointer, reference type.
    printfn "\nDetermine whether a variable is an array, pointer, or reference type.\n"
    if myType.HasElementType then
        printfn $"The type of myArray is {myType.myElementType}."
    else
        printfn "myArray is not an array, pointer, or reference type."
    let myType = MyTypeDelegator(myInt.GetType())
    // Determine whether myType is an array, pointer, reference type.
    if myType.HasElementType then
        printfn $"The type of myInt is {myType.myElementType}."
    else
        printfn "myInt is not an array, pointer, or reference type."
with e ->
    printfn $"Exception: {e.Message}"

Imports System.Reflection

Public Class MyTypeDelegator
    Inherits TypeDelegator
    Public myElementType As String = Nothing
    Private myType As Type = Nothing
    Public Sub New(ByVal myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub
    ' Override Type.HasElementTypeImpl().
    Protected Overrides Function HasElementTypeImpl() As Boolean
        ' Determine whether the type is an array.
        If myType.IsArray Then
            myElementType = "array"
            Return True
        End If
        ' Determine whether the type is a reference.
        If myType.IsByRef Then
            myElementType = "reference"
            Return True
        End If
        ' Determine whether the type is a pointer.
        If myType.IsPointer Then
            myElementType = "pointer"
            Return True
        End If
        ' The type is not a reference, array, or pointer type.
        Return False
    End Function 'HasElementTypeImpl
End Class
Public Class Type_HasElementTypeImpl
    Public Shared Sub Main()
        Try
            Dim myInt As Integer = 0
            Dim myArray(4) As Integer
            Dim myType As New MyTypeDelegator(myArray.GetType())
            Console.WriteLine(ControlChars.NewLine + "Determine whether a variable refers to an array or pointer or reference type." + ControlChars.NewLine)
            ' Determine whether myType is an array, pointer, reference type.  
            If myType.HasElementType Then
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType.ToString())
            Else
                Console.WriteLine("myArray is not an array, pointer, or reference type.")
            End If
            myType = New MyTypeDelegator(myInt.GetType())
            ' Determine whether myType is an array, pointer, reference type. 
            If myType.HasElementType Then
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType.ToString())
            Else
                Console.WriteLine("myInt is not an array, pointer, or reference type.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub
End Class

Keterangan

Jika saat ini Type mewakili jenis generik, atau parameter jenis dalam definisi jenis generik atau metode generik, properti ini selalu mengembalikan false.

Properti ini bersifat hanya dapat dibaca.

Lihat juga

• IsPointerImpl()