DefaultPropertyAttribute Clase

Definición

public ref class DefaultPropertyAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class)]
public sealed class DefaultPropertyAttribute : Attribute

public sealed class DefaultPropertyAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class)>]
type DefaultPropertyAttribute = class
    inherit Attribute

type DefaultPropertyAttribute = class
    inherit Attribute

Public NotInheritable Class DefaultPropertyAttribute
Inherits Attribute

Herencia

Object

Attribute

DefaultPropertyAttribute

Atributos

AttributeUsageAttribute

Ejemplos

En el ejemplo siguiente se define un control denominado MyControl. La clase se marca con un DefaultPropertyAttribute objeto que especifica MyProperty como la propiedad predeterminada.

[DefaultProperty("MyProperty")]
ref class MyControl: public Control
{
public:

   property int MyProperty 
   {
      int get()
      {
         // Insert code here.
         return 0;
      }

      void set( int value )
      {
         // Insert code here.
      }
   }
   // Insert any additional code.
};

[DefaultProperty("MyProperty")]
 public class MyControl : Control {
 
    public int MyProperty {
       get {
          // Insert code here.
          return 0;
       }
       set {
          // Insert code here.
       }
    }
 
    // Insert any additional code.
 }

<DefaultProperty("MyProperty")> _
Public Class MyControl
    Inherits Control

    Public Property MyProperty() As Integer
        Get
            ' Insert code here.
            Return 0
        End Get
        Set
            ' Insert code here.
        End Set 
    End Property
    ' Insert any additional code.
End Class

En el ejemplo siguiente se crea una instancia de MyControl. A continuación, obtiene los atributos de la clase , extrae y DefaultPropertyAttributeimprime el nombre de la propiedad predeterminada.

int main()
{
   // Creates a new control.
   Form1::MyControl^ myNewControl = gcnew Form1::MyControl;

   // Gets the attributes for the collection.
   AttributeCollection^ attributes = TypeDescriptor::GetAttributes( myNewControl );

   /* Prints the name of the default property by retrieving the 
       * DefaultPropertyAttribute from the AttributeCollection. */
   DefaultPropertyAttribute^ myAttribute = dynamic_cast<DefaultPropertyAttribute^>(attributes[ DefaultPropertyAttribute::typeid ]);
   Console::WriteLine( "The default property is: {0}", myAttribute->Name );
   return 0;
}

public static int Main() {
    // Creates a new control.
    MyControl myNewControl = new MyControl();
 
    // Gets the attributes for the collection.
    AttributeCollection attributes = TypeDescriptor.GetAttributes(myNewControl);
 
    /* Prints the name of the default property by retrieving the 
     * DefaultPropertyAttribute from the AttributeCollection. */
    DefaultPropertyAttribute myAttribute = 
       (DefaultPropertyAttribute)attributes[typeof(DefaultPropertyAttribute)];
    Console.WriteLine("The default property is: " + myAttribute.Name);
  
    return 0;
 }

Public Shared Function Main() As Integer
    ' Creates a new control.
    Dim myNewControl As New MyControl()
    
    ' Gets the attributes for the collection.
    Dim attributes As AttributeCollection = TypeDescriptor.GetAttributes(myNewControl)
    
    ' Prints the name of the default property by retrieving the
    ' DefaultPropertyAttribute from the AttributeCollection. 
    Dim myAttribute As DefaultPropertyAttribute = _
        CType(attributes(GetType(DefaultPropertyAttribute)), DefaultPropertyAttribute)
    Console.WriteLine(("The default property is: " + myAttribute.Name))
    Return 0
End Function 'Main

Comentarios

Utilice la Name propiedad para obtener el nombre de la propiedad predeterminada.

Para obtener más información, consulte Attributes (Atributos).

Constructores

Campos

Propiedades

Métodos

Implementaciones de interfaz explícitas

Se aplica a

Consulte también

• Attribute