LicenseProviderAttribute Classe

Définition

public ref class LicenseProviderAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple=false, Inherited=false)]
public sealed class LicenseProviderAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple=false, Inherited=false)>]
type LicenseProviderAttribute = class
    inherit Attribute

Public NotInheritable Class LicenseProviderAttribute
Inherits Attribute

Héritage

Object

Attribute

LicenseProviderAttribute

Attributs

AttributeUsageAttribute

Exemples

L’exemple de code suivant utilise le LicFileLicenseProvider fournisseur de licences pour MyControl.

[LicenseProvider(LicFileLicenseProvider::typeid)]
ref class MyControl: public Control
{
protected:

   // Insert code here.
   ~MyControl()
   {
      /* All components must dispose of the licenses they grant. 
               * Insert code here to dispose of the license. */
   }
};

[LicenseProvider(typeof(LicFileLicenseProvider))]
public class MyControl : Control
{
    // Insert code here.

    protected override void Dispose(bool disposing)
    {
        /* All components must dispose of the licenses they grant. 
         * Insert code here to dispose of the license. */
    }
}

<LicenseProvider(GetType(LicFileLicenseProvider))> _
Public Class MyControl
    Inherits Control
    
    ' Insert code here.
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        ' All components must dispose of the licenses they grant.
        ' Insert code here to dispose of the license.
    End Sub        

End Class

L’exemple de code suivant crée une instance de la MyControl classe. Ensuite, il obtient les attributs de la classe et imprime le nom du fournisseur de licences utilisé par myNewControl.

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

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

   /* Prints the name of the license provider by retrieving the LicenseProviderAttribute 
        * from the AttributeCollection. */
   LicenseProviderAttribute^ myAttribute = dynamic_cast<LicenseProviderAttribute^>(attributes[ LicenseProviderAttribute::typeid ]);
   Console::WriteLine( "The license provider for this class is: {0}", myAttribute->LicenseProvider );
   return 0;
}

public static int Main()
{
    // Creates a new component.
    MyControl myNewControl = new();

    // Gets the attributes for the component.
    AttributeCollection attributes = TypeDescriptor.GetAttributes(myNewControl);

    /* Prints the name of the license provider by retrieving the LicenseProviderAttribute 
     * from the AttributeCollection. */
    LicenseProviderAttribute myAttribute = (LicenseProviderAttribute)attributes[typeof(LicenseProviderAttribute)];
    Console.WriteLine("The license provider for this class is: " + myAttribute.LicenseProvider.ToString());

    return 0;
}

Public Shared Function Main() As Integer
    ' Creates a new component.
    Dim myNewControl As New MyControl()
    
    ' Gets the attributes for the component.
    Dim attributes As AttributeCollection = TypeDescriptor.GetAttributes(myNewControl)
    
    ' Prints the name of the license provider by retrieving the LicenseProviderAttribute 
    ' from the AttributeCollection. 
    Dim myAttribute As LicenseProviderAttribute = _
        CType(attributes(GetType(LicenseProviderAttribute)), LicenseProviderAttribute)
        
    Console.WriteLine(("The license provider for this class is: " & _
        myAttribute.LicenseProvider.ToString()))
    Return 0
End Function

Remarques

Lorsque vous créez un composant que vous souhaitez licence, vous devez spécifier le LicenseProvider composant en marquant le composant avec un LicenseProviderAttribute.

Utilisez la LicenseProvider propriété pour obtenir le TypeLicenseProvider.

Pour plus d’informations sur les attributs, consultez Attributs. Pour plus d’informations sur les licences, consultez How to : License Components and Controls.

Voir aussi

• License
• LicenseContext
• LicenseException
• LicenseManager
• LicenseProvider
• LicFileLicenseProvider
• LicenseUsageMode