Type.Equals Type.Equals Type.Equals Type.Equals Method

Definición

Determina si el tipo del sistema subyacente del objeto Type actual coincide con el tipo del sistema subyacente del objeto Object o Type especificado.Determines if the underlying system type of the current Type is the same as the underlying system type of the specified Object or Type.

Sobrecargas

Equals(Type) Equals(Type) Equals(Type) Equals(Type)

Determina si el tipo de sistema subyacente del objeto Type actual es igual que el tipo de sistema subyacente del objeto Type especificado.Determines if the underlying system type of the current Type is the same as the underlying system type of the specified Type.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el tipo del sistema subyacente del objeto Type actual es el mismo que el tipo del sistema subyacente del objeto Object especificado.Determines if the underlying system type of the current Type object is the same as the underlying system type of the specified Object.

Equals(Type) Equals(Type) Equals(Type) Equals(Type)

Determina si el tipo de sistema subyacente del objeto Type actual es igual que el tipo de sistema subyacente del objeto Type especificado.Determines if the underlying system type of the current Type is the same as the underlying system type of the specified Type.

public:
 virtual bool Equals(Type ^ o);
public virtual bool Equals (Type o);
override this.Equals : Type -> bool
Public Overridable Function Equals (o As Type) As Boolean

Parámetros

o
Type Type Type Type

Objeto cuyo tipo de sistema subyacente se va a comparar con el tipo de sistema subyacente del objeto Type actual.The object whose underlying system type is to be compared with the underlying system type of the current Type.

Devoluciones

Es true si el tipo del sistema subyacente de o coincide con el tipo del sistema subyacente del objeto Type actual; de lo contrario, es false.true if the underlying system type of o is the same as the underlying system type of the current Type; otherwise, false.

Implementaciones

Ejemplos

En el ejemplo siguiente Equals se usa para comparar dos tipos.The following example uses Equals to compare two types.


using System;
using System.Reflection;

class Example
{
    public static void Main()
    {

        Type a = typeof(System.String);
        Type b = typeof(System.Int32);

        Console.WriteLine("{0} == {1}: {2}", a, b, a.Equals(b));

        // The Type objects in a and b are not equal,
        // because they represent different types.

        a = typeof(Example);
        b = new Example().GetType();

        Console.WriteLine("{0} is equal to {1}: {2}", a, b, a.Equals(b));

        // The Type objects in a and b are equal,
        // because they both represent type Example.

        b = typeof(Type);

        Console.WriteLine("typeof({0}).Equals(typeof({1})): {2}", a, b, a.Equals(b));

        // The Type objects in a and b are not equal,
        // because variable a represents type Example
        // and variable b represents type Type.

        //Console.ReadLine();

    }
}

//
/* This code example produces the following output:
    System.String == System.Int32: False
    Example is equal to Example: True
    typeof(Example).Equals(typeof(System.Type)): False
*/
Imports System.Reflection



Class Example
    
    Public Shared Sub Main() 
        
        Dim a As Type = GetType(System.String)
        Dim b As Type = GetType(System.Int32)
        
        Console.WriteLine("{0} = {1}: {2}", a, b, a.Equals(b))
        ' The Type objects in a and b are not equal,
        ' because they represent different types.

        a = GetType(Example)
        b = New Example().GetType()
        Console.WriteLine("{0} is equal to {1}: {2}", a, b, a.Equals(b))
        ' The Type objects in a and b are equal,
        ' because they both represent type Example.

        b = GetType(Type)
        Console.WriteLine("typeof({0}).Equals(typeof({1})): {2}", a, b, a.Equals(b))
        ' The Type objects in a and b are not equal,
        ' because variable a represents type Example
        ' and variable b represents type Type.

        'Console.ReadLine()
    
    End Sub 
End Class
'
' This code example produces the following output:
'    System.String = System.Int32: False
'    Example is equal to Example: True
'    typeof(Example).Equals(typeof(System.Type)): False
'
Consulte también:

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el tipo del sistema subyacente del objeto Type actual es el mismo que el tipo del sistema subyacente del objeto Object especificado.Determines if the underlying system type of the current Type object is the same as the underlying system type of the specified Object.

public:
 override bool Equals(System::Object ^ o);
public override bool Equals (object o);
override this.Equals : obj -> bool
Public Overrides Function Equals (o As Object) As Boolean

Parámetros

o
Object Object Object Object

Objeto cuyo tipo de sistema subyacente se va a comparar con el tipo de sistema subyacente del objeto Type actual.The object whose underlying system type is to be compared with the underlying system type of the current Type. Para que la comparación se realice correctamente, o debe poder convertirse en un objeto de tipo Type.For the comparison to succeed, o must be able to be cast or converted to an object of type Type.

Devoluciones

Es true si el tipo del sistema subyacente de o coincide con el tipo del sistema subyacente del objeto Type actual; de lo contrario, es false.true if the underlying system type of o is the same as the underlying system type of the current Type; otherwise, false. Este método también devuelve false si:This method also returns false if: .
El valor de

  • o es null.
  • o is null.

  • o no se puede convertir en un objeto Type.
  • o cannot be cast or converted to a Type object.
  • Implementaciones

    Ejemplos

    En el ejemplo siguiente Equals(Object) se usa para Type comparar varias instancias de Object objeto con varias instancias.The following example uses Equals(Object) to compare various Type object instances with various Object instances.

    using System;
    using System.Collections.Generic;
    using System.Reflection;
    
    public class Example
    {
       public static void Main()
       {
          Type t =typeof(int);
          Object obj1 = typeof(int).GetTypeInfo();
          IsEqualTo(t, obj1);
    
          Object obj2 = typeof(String);
          IsEqualTo(t, obj2);
          
          t = typeof(Object);
          Object obj3 = typeof(Object);
          IsEqualTo(t, obj3);
          
          t = typeof(List<>);
          Object obj4 = (new List<String>()).GetType();
          IsEqualTo(t, obj4);
          
          t = typeof(Type);
          Object obj5 = null;
          IsEqualTo(t, obj5);
       }
       
       private static void IsEqualTo(Type t, Object inst)
       {
          Type t2 = inst as Type;
          if (t2 != null)
             Console.WriteLine("{0} = {1}: {2}", t.Name, t2.Name,
                               t.Equals(t2));
          else
             Console.WriteLine("Cannot cast the argument to a type.");
    
          Console.WriteLine();                        
       }
    }
    // The example displays the following output:
    //       Int32 = Int32: True
    //       
    //       Int32 = String: False
    //       
    //       Object = Object: True
    //       
    //       List`1 = List`1: False
    //       
    //       Cannot cast the argument to a type.
    
    Imports System.Collections.Generic
    Imports System.Reflection
    
    Module Example
       Public Sub Main()
          Dim t As Type = GetType(Integer)
          Dim obj1 As Object = GetType(Integer).GetTypeInfo()
          IsEqualTo(t, obj1)
    
          Dim obj2 As Object = GetType(String)
          IsEqualTo(t, obj2)
          
          t = GetType(Object)
          Dim obj3 As Object = GetType(Object)
          IsEqualTo(t, obj3)
          
          t = GetType(List(Of ))
          Dim obj4 As Object = (New List(Of String())).GetType()
          IsEqualTo(t, obj4)
          
          t = GetType(Type)
          Dim obj5 As Object = Nothing
          IsEqualTo(t, obj5)
       End Sub
       
       Private Sub IsEqualTo(t As Type, inst As Object)
          Dim t2 As Type = TryCast(inst, Type)
          If t2 IsNot Nothing Then
             Console.WriteLine("{0} = {1}: {2}", t.Name, t2.Name,
                               t.Equals(t2))
          Else
             Console.WriteLine("Cannot cast the argument to a type.")
          End If
          Console.WriteLine()                        
       End Sub
    End Module
    ' The example displays the following output:
    '       Int32 = Int32: True
    '       
    '       Int32 = String: False
    '       
    '       Object = Object: True
    '       
    '       List`1 = List`1: False
    '       
    '       Cannot cast the argument to a type.
    

    Dos cosas son especialmente importantes para el ejemplo:Two things are particularly worth noting about the example:

    • La comparación de un Type objeto que representa un entero con un TypeInfo objeto que representa un valor devuelto true por un TypeInfo entero porque se Typederiva de.The comparison of a Type object that represents an integer with a TypeInfo object that represents an integer return true because TypeInfo is derived from Type.

    • La comparación de un Type objeto que representa un IList<T> objeto (un tipo genérico abierto) con un List(Of String) objeto (un tipo genérico cerrado) devuelve false.The comparison of a Type object that represents a IList<T> object (an open generic type) with a List(Of String) object (a closed generic type) returns false.

    Comentarios

    Este método invalida Object.Equals.This method overrides Object.Equals. Convierte o a un objeto de tipo Type y llama al Type.Equals(Type) método.It casts o to an object of type Type and calls the Type.Equals(Type) method.

    Consulte también:

    Se aplica a