ResourceProviderFactory Clase

Definición

Actúa como clase base para las clases que crean proveedores de recursos.Serves as the base class for classes that create resource providers.

public ref class ResourceProviderFactory abstract
public abstract class ResourceProviderFactory
type ResourceProviderFactory = class
Public MustInherit Class ResourceProviderFactory
Herencia
ResourceProviderFactory

Ejemplos

En el ejemplo de código siguiente se muestra un generador de proveedores de recursos personalizado que recupera los valores almacenados en caché.The following code example shows a customized resource provider factory that retrieves cached values.

[
    DesignTimeResourceProviderFactoryAttribute(
        typeof(CustomDesignTimeResourceProviderFactory))
]
public class CustomResourceProviderFactory : ResourceProviderFactory
{
    public override IResourceProvider
      CreateGlobalResourceProvider(string classname)
    {
        return new CustomResourceProvider(null, classname);
    }
    public override IResourceProvider
      CreateLocalResourceProvider(string virtualPath)
    {
        return new CustomResourceProvider(virtualPath, null);
    }
}

// Define the resource provider for global and local resources.
internal class CustomResourceProvider : IResourceProvider
{
    string _virtualPath;
    string _className;

    public CustomResourceProvider(string virtualPath, string classname)
    {
        _virtualPath = virtualPath;
        _className = classname;
    }

    private IDictionary GetResourceCache(string culturename)
    {
        return (IDictionary)
            System.Web.HttpContext.Current.Cache[culturename];
    }

    object IResourceProvider.GetObject
        (string resourceKey, CultureInfo culture)
    {
        object value;

        string cultureName = null;
        if (culture != null)
        {
            cultureName = culture.Name;
        }
        else
        {
            cultureName = CultureInfo.CurrentUICulture.Name;
        }

        value = GetResourceCache(cultureName)[resourceKey];
        value ??= GetResourceCache(null)[resourceKey];
        return value;
    }

    IResourceReader IResourceProvider.ResourceReader
    {
        get
        {
            string cultureName = null;
            CultureInfo currentUICulture = CultureInfo.CurrentUICulture;
            if (!String.Equals(currentUICulture.Name,
                CultureInfo.InstalledUICulture.Name))
            {
                cultureName = currentUICulture.Name;
            }

            return new CustomResourceReader
                (GetResourceCache(cultureName));
        }
    }
}

internal sealed class CustomResourceReader : IResourceReader
{
    private IDictionary _resources;

    public CustomResourceReader(IDictionary resources)
    {
        _resources = resources;
    }

    IDictionaryEnumerator IResourceReader.GetEnumerator()
    {
        return _resources.GetEnumerator();
    }

    void IResourceReader.Close() { }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return _resources.GetEnumerator();
    }

    void IDisposable.Dispose() { return; }
}
<DesignTimeResourceProviderFactoryAttribute(GetType(CustomDesignTimeResourceProviderFactory))> _
Public Class CustomResourceProviderFactory
    Inherits ResourceProviderFactory
    Public Overrides Function CreateGlobalResourceProvider(ByVal classname As String) As IResourceProvider
        Return New CustomResourceProvider(Nothing, classname)
    End Function
    Public Overrides Function CreateLocalResourceProvider(ByVal virtualPath As String) As IResourceProvider
        Return New CustomResourceProvider(virtualPath, Nothing)
    End Function
End Class

' Define the resource provider for global and local resources.
Friend Class CustomResourceProvider
    Implements IResourceProvider
    Dim _virtualPath As String
    Dim _className As String

    Public Sub New(ByVal virtualPath As String, ByVal classname As String)
        _virtualPath = virtualPath
        _className = classname
    End Sub

    Private Function GetResourceCache(ByVal culturename As String) As IDictionary
        Return System.Web.HttpContext.Current.Cache(culturename)
    End Function

    Function GetObject(ByVal resourceKey As String, ByVal culture As CultureInfo) As Object Implements IResourceProvider.GetObject
        Dim value As Object
        Dim cultureName As String
        cultureName = Nothing
        If (IsNothing(culture)) Then
            cultureName = CultureInfo.CurrentUICulture.Name
        Else
            cultureName = culture.Name
        End If

        value = GetResourceCache(cultureName)(resourceKey)
        If (value = Nothing) Then
            value = GetResourceCache(Nothing)(resourceKey)
        End If
        Return value
    End Function


    ReadOnly Property ResourceReader() As IResourceReader Implements IResourceProvider.ResourceReader
        Get
            Dim cultureName As String
            Dim currentUICulture As CultureInfo
            cultureName = Nothing
            currentUICulture = CultureInfo.CurrentUICulture
            If (Not (String.Equals(currentUICulture.Name, CultureInfo.InstalledUICulture.Name))) Then
                cultureName = currentUICulture.Name
            End If

            Return New CustomResourceReader(GetResourceCache(cultureName))
        End Get
    End Property
End Class

Friend NotInheritable Class CustomResourceReader
    Implements IResourceReader
    Private _resources As IDictionary

    Public Sub New(ByVal resources As IDictionary)
        _resources = resources
    End Sub

    Function GetEnumerator1() As IDictionaryEnumerator Implements IResourceReader.GetEnumerator
        Return _resources.GetEnumerator()
    End Function

    Sub Close() Implements IResourceReader.Close

    End Sub

    Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator
        Return _resources.GetEnumerator()
    End Function

    Sub Dispose() Implements IDisposable.Dispose

    End Sub
End Class

Comentarios

ResourceProviderFactory es una clase abstracta que actúa como clase base para los objetos que devuelven proveedores de recursos globales y locales.ResourceProviderFactory is an abstract class that serves as the base class for objects that return global and local resource providers. Las clases deben derivarse de ResourceProviderFactory para implementar su funcionalidad.Classes must derive from ResourceProviderFactory to implement its functionality.

Constructores

ResourceProviderFactory()

Cuando se implementa en una clase derivada, inicializa una nueva instancia de la clase derivada.When implemented in a derived class, initializes a new instance of the derived class.

Métodos

CreateGlobalResourceProvider(String)

Cuando se reemplaza en una clase derivada, crea un proveedor de recursos globales.When overridden in a derived class, creates a global resource provider.

CreateLocalResourceProvider(String)

Cuando se reemplaza en una clase derivada, crea un proveedor de recursos locales.When overridden in a derived class, creates a local resource provider.

Equals(Object)

Determina si el objeto especificado es igual que el objeto actual.Determines whether the specified object is equal to the current object.

(Heredado de Object)
GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Heredado de Object)
GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Heredado de Object)
MemberwiseClone()

Crea una copia superficial del Object actual.Creates a shallow copy of the current Object.

(Heredado de Object)
ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Heredado de Object)

Se aplica a

Consulte también