ObsoleteAttribute Classe

Definição

public ref class ObsoleteAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)]
public sealed class ObsoleteAttribute : Attribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)]
[System.Serializable]
public sealed class ObsoleteAttribute : Attribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class ObsoleteAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)>]
type ObsoleteAttribute = class
    inherit Attribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)>]
[<System.Serializable>]
type ObsoleteAttribute = class
    inherit Attribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Property | System.AttributeTargets.Struct, Inherited=false)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type ObsoleteAttribute = class
    inherit Attribute

Public NotInheritable Class ObsoleteAttribute
Inherits Attribute

Herança

Object

Attribute

ObsoleteAttribute

Atributos

AttributeUsageAttribute SerializableAttribute ComVisibleAttribute

Exemplos

O exemplo seguinte define uma classe que contém uma propriedade e um método que estão marcados com o ObsoleteAttribute atributo. Aceder ao valor da OldProperty propriedade no código gera um aviso do compilador, mas chamar o CallOldMethod método gera um erro do compilador. O exemplo também mostra o resultado que resulta quando tentas compilar o código-fonte.

using System;
using System.Reflection;

public class Example
{
   // Mark OldProperty As Obsolete.
   [ObsoleteAttribute("This property is obsolete. Use NewProperty instead.", false)]
   public static string OldProperty
   { get { return "The old property value."; } }

   public static string NewProperty
   { get { return "The new property value."; } }

   // Mark CallOldMethod As Obsolete.
   [ObsoleteAttribute("This method is obsolete. Call CallNewMethod instead.", true)]
   public static string CallOldMethod()
   {
      return "You have called CallOldMethod.";
   }

   public static string CallNewMethod()
   {
      return "You have called CallNewMethod.";
   }

   public static void Main()
   {
      Console.WriteLine(OldProperty);
      Console.WriteLine();
      Console.WriteLine(CallOldMethod());
   }
}
// The attempt to compile this example produces output like the following output:
//    Example.cs(31,25): error CS0619: 'Example.CallOldMethod()' is obsolete:
//            'This method is obsolete. Call CallNewMethod instead.'
//    Example.cs(29,25): warning CS0618: 'Example.OldProperty' is obsolete:
//            'This property is obsolete. Use NewProperty instead.'

open System

// Mark oldValue As Obsolete.
[<ObsoleteAttribute("This value is obsolete. Use newValue instead.", false)>]
let oldValue =
    "The old property value."

let newValue =
    "The new property value."

// Mark callOldFunction As Obsolete.
[<ObsoleteAttribute("This function is obsolete. Call callNewFunction instead.", true)>]
let callOldFunction () =
    "You have called CallOldMethod."

let callNewFunction () =
    "You have called CallNewMethod."

printfn $"{oldValue}"
printfn ""
printfn $"{callOldFunction ()}"
// The attempt to compile this example produces output like the following output:
//    Example.fs(23,12): error FS0101: This construct is deprecated. This function is obsolete. Call callNewFunction instead.
//    Example.fs(21,12): warning FS0044: This construct is deprecated. This value is obsolete. Use newValue instead.

Imports System.Reflection

Public Module Example
   ' Mark OldProperty As Obsolete.
   <ObsoleteAttribute("This property is obsolete. Use NewProperty instead.", False)> 
   Public ReadOnly Property OldProperty As String
      Get
         Return "The old property value."
      End Get
   End Property
   
   Public ReadOnly Property NewProperty As String
      Get
         Return "The new property value."
      End Get
   End Property
   
   ' Mark OldMethod As Obsolete.
   <ObsoleteAttribute("This method is obsolete. Call CallNewMethod instead.", True)> 
   Public Function CallOldMethod() As String
      Return "You have called CallOldMethod."
   End Function
      
   Public Function CallNewMethod() As String   
      Return "You have called NewMethod."
   End Function   
   
   Public Sub Main()
      Console.WriteLine(OldProperty)
      Console.WriteLine()
      Console.WriteLine(CallOldMethod())
   End Sub  
End Module
'  The attempt to compile this example produces output like the following:
'    Example.vb(30) : warning BC40000: 'Public ReadOnly Property OldProperty As String' is obsolete: 
'                     'This property is obsolete. Use NewProperty instead.'.
'    
'          Console.WriteLine(OldProperty)
'                            ~~~~~~~~~~~
'    Example.vb(32) : error BC30668: 'Public Function CallOldMethod() As String' is obsolete: 
'                     'This method is obsolete. Call CallNewMethod instead.'.
'    
'          Console.WriteLine(CallOldMethod())
'                            ~~~~~~~~~~~~~

Observações

O código-fonte importado da ObsoleteAttribute.cs sem quaisquer alterações, ignorando todos os avisos resultantes.

Ver também

• Attribute
• Estender metadados usando atributos