L'exemple suivant crée la propriété MyImage. La propriété comporte deux attributs : DescriptionAttribute et CategoryAttribute.
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<Description("The image associated with the control"), _
Category("Appearance")> _
Public Property MyImage() As Image
Get
' Insert code here.
Return image1
End Get
Set
' Insert code here.
End Set
End Property
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[Description("The image associated with the control"),Category("Appearance")]
public Image MyImage {
get {
// Insert code here.
return image1;
}
set {
// Insert code here.
}
}
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[Description("The image associated with the control"),Category("Appearance")]
System::Drawing::Image^ get()
{
// Insert code here.
return m_Image1;
}
void set( System::Drawing::Image^ )
{
// Insert code here.
}
}
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/** @attribute Description("The image associated with the control")
* @attribute Category("Appearance")
*/
/** @property
*/
public Image get_MyImage()
{
// Insert code here.
return image1;
} //get_MyImage
/** @property
*/
public void set_MyImage(Image value)
{
// Insert code here.
} //set_MyImage
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L'exemple suivant obtient la catégorie de MyImage. Le code extrait d'abord PropertyDescriptorCollection avec toutes les propriétés de l'objet. Le code indexe ensuite dans PropertyDescriptorCollection pour obtenir MyImage. Il retourne ensuite les attributs pour cette propriété et les enregistre dans la variable attributes.
L'exemple imprime ensuite la catégorie en récupérant CategoryAttribute de AttributeCollection et en l'affichant sur l'écran de la console.
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' Gets the attributes for the property.
Dim attributes As AttributeCollection = _
TypeDescriptor.GetProperties(Me)("MyImage").Attributes
' Prints the description by retrieving the CategoryAttribute.
' from the AttributeCollection.
Dim myAttribute As CategoryAttribute = _
CType(attributes(GetType(CategoryAttribute)), CategoryAttribute)
Console.WriteLine(myAttribute.Category)
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// Gets the attributes for the property.
AttributeCollection attributes =
TypeDescriptor.GetProperties(this)["MyImage"].Attributes;
// Prints the description by retrieving the CategoryAttribute.
// from the AttributeCollection.
CategoryAttribute myAttribute =
(CategoryAttribute)attributes[typeof(CategoryAttribute)];
Console.WriteLine(myAttribute.Category);
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// Gets the attributes for the property.
AttributeCollection^ attributes = TypeDescriptor::GetProperties( this )[ "MyImage" ]->Attributes;
// Prints the description by retrieving the CategoryAttribute.
// from the AttributeCollection.
CategoryAttribute^ myAttribute = static_cast<CategoryAttribute^>(attributes[ CategoryAttribute::typeid ]);
Console::WriteLine( myAttribute->Category );
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// Gets the attributes for the property.
AttributeCollection attributes = TypeDescriptor.GetProperties(this)
.get_Item("MyImage").get_Attributes();
// Prints the description by retrieving the CategoryAttribute.
// from the AttributeCollection.
CategoryAttribute myAttribute = (CategoryAttribute)(
attributes.get_Item(CategoryAttribute.class.ToType()));
Console.WriteLine(myAttribute.get_Category());
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