Type.IsInstanceOfType(Object) Metode

public:
 virtual bool IsInstanceOfType(System::Object ^ o);

public virtual bool IsInstanceOfType(object? o);

public virtual bool IsInstanceOfType(object o);

abstract member IsInstanceOfType : obj -> bool
override this.IsInstanceOfType : obj -> bool

Public Overridable Function IsInstanceOfType (o As Object) As Boolean

Parameter

Mengembalikan

true jika saat ini Type berada dalam hierarki pewarisan objek yang diwakili oleh o, atau jika saat ini Type adalah antarmuka yang o mengimplementasikan. false jika tidak satu pun dari kondisi ini adalah kasus, jika o adalah null, atau jika saat ini Type adalah jenis generik terbuka (yaitu, ContainsGenericParameters mengembalikan true).

Penerapan

Contoh

Contoh berikut menunjukkan penggunaan IsInstanceOfType metode .

using System;

public interface IExample {}

public class BaseClass : IExample {}

public class DerivedClass : BaseClass {}

public class Example
{
    public static void Main()
    {
        var interfaceType = typeof(IExample);
        var base1 = new BaseClass();
        var base1Type = base1.GetType();
        var derived1 = new DerivedClass();
        var derived1Type = derived1.GetType();
        int[] arr = new int[11];

        Console.WriteLine("Is int[] an instance of the Array class? {0}.",
                           typeof(Array).IsInstanceOfType(arr));
        Console.WriteLine("Is base1 an instance of BaseClass? {0}.",
                          base1Type.IsInstanceOfType(base1));
        Console.WriteLine("Is derived1 an instance of BaseClass? {0}.",
                          base1Type.IsInstanceOfType(derived1));
        Console.WriteLine("Is base1 an instance of IExample? {0}.",
                          interfaceType.IsInstanceOfType(base1));
        Console.WriteLine("Is derived1 an instance of IExample? {0}.",
                          interfaceType.IsInstanceOfType(derived1));
    }
}
// The example displays the following output:
//    Is int[] an instance of the Array class? True.
//    Is base1 an instance of BaseClass? True.
//    Is derived1 an instance of BaseClass? True.
//    Is base1 an instance of IExample? True.
//    Is derived1 an instance of IExample? True.

open System

type IExample = interface end

type BaseClass() = interface IExample

type DerivedClass() = inherit BaseClass()

let interfaceType = typeof<IExample>
let base1 = BaseClass()
let base1Type = base1.GetType()
let derived1 = DerivedClass()
let derived1Type = derived1.GetType()
let arr = Array.zeroCreate<int> 11

printfn $"Is int[] an instance of the Array class? {typeof<Array>.IsInstanceOfType arr}."
printfn $"Is base1 an instance of BaseClass? {base1Type.IsInstanceOfType base1}."
printfn $"Is derived1 an instance of BaseClass? {base1Type.IsInstanceOfType derived1}."
printfn $"Is base1 an instance of IExample? {interfaceType.IsInstanceOfType base1}."
printfn $"Is derived1 an instance of IExample? {interfaceType.IsInstanceOfType derived1}."
// The example displays the following output:
//    Is int[] an instance of the Array class? True.
//    Is base1 an instance of BaseClass? True.
//    Is derived1 an instance of BaseClass? True.
//    Is base1 an instance of IExample? True.
//    Is derived1 an instance of IExample? True.

Public Interface IExample
End Interface

Public Class BaseClass : Implements IExample
End Class

Public Class DerivedClass : Inherits BaseClass
End Class

Public Module Example
    Public Sub Main()
        Dim interfaceType As Type = GetType(IExample)
        Dim base1 As New BaseClass()
        Dim base1Type As Type = base1.GetType()
        Dim derived1 = New DerivedClass()
        Dim derived1Type As Type = derived1.GetType()
        Dim arr(10) As Integer

        Console.WriteLine("Is int[] an instance of the Array class? {0}.",
                           GetType(Array).IsInstanceOfType(arr))
        Console.WriteLine("Is base1 an instance of BaseClass? {0}.",
                          base1Type.IsInstanceOfType(base1))
        Console.WriteLine("Is derived1 an instance of BaseClass? {0}.",
                          base1Type.IsInstanceOfType(derived1))
        Console.WriteLine("Is base1 an instance of IExample? {0}.",
                          interfaceType.IsInstanceOfType(base1))
        Console.WriteLine("Is derived1 an instance of IExample? {0}.",
                          interfaceType.IsInstanceOfType(derived1))
    End Sub
End Module
' The example displays the following output:
'    Is int[] an instance of the Array class? True.
'    Is base1 an instance of BaseClass? True.
'    Is derived1 an instance of BaseClass? True.
'    Is base1 an instance of IExample? True.
'    Is derived1 an instance of IExample? True.

Keterangan

Metode ini dapat ditimpa oleh kelas turunan.