Type.FindInterfaces(TypeFilter, Object) Método

Definición

Devuelve una matriz de objetos Type que representa una lista filtrada de interfaces implementadas o heredadas por el objeto Type actual.Returns an array of Type objects representing a filtered list of interfaces implemented or inherited by the current Type.

public:
 virtual cli::array <Type ^> ^ FindInterfaces(System::Reflection::TypeFilter ^ filter, System::Object ^ filterCriteria);
public virtual Type[] FindInterfaces (System.Reflection.TypeFilter filter, object? filterCriteria);
public virtual Type[] FindInterfaces (System.Reflection.TypeFilter filter, object filterCriteria);
abstract member FindInterfaces : System.Reflection.TypeFilter * obj -> Type[]
override this.FindInterfaces : System.Reflection.TypeFilter * obj -> Type[]
Public Overridable Function FindInterfaces (filter As TypeFilter, filterCriteria As Object) As Type()

Parámetros

filter
TypeFilter

Delegado que compara las interfaces con filterCriteria.The delegate that compares the interfaces against filterCriteria.

filterCriteria
Object

Criterios de búsqueda que determinan si una interfaz se debe incluir en la matriz devuelta.The search criteria that determines whether an interface should be included in the returned array.

Devoluciones

Type[]

Matriz de objetos Type que representa una lista filtrada de las interfaces implementadas o heredadas por el objeto Type actual, o bien una matriz vacía si el objeto Type actual no implementa ni hereda ninguna interfaz que coincida con el filtro.An array of Type objects representing a filtered list of the interfaces implemented or inherited by the current Type, or an empty array if no interfaces matching the filter are implemented or inherited by the current Type.

Implementaciones

Excepciones

El valor de filter es null.filter is null.

Se invoca un inicializador estático y produce una excepción.A static initializer is invoked and throws an exception.

Ejemplos

En el ejemplo siguiente se busca la interfaz especificada implementada o heredada por el tipo especificado y, a continuación, se muestran los nombres de interfaz.The following example finds the specified interface implemented or inherited by the specified type, and then displays the interface names.

#using <system.xml.dll>

using namespace System;
using namespace System::Xml;
using namespace System::Reflection;
public ref class MyFindInterfacesSample
{
public:
    static bool MyInterfaceFilter(Type^ typeObj, Object^ criteriaObj)
    {
        if(typeObj->ToString()->Equals(criteriaObj->ToString()))
            return true;
        else
            return false;
   }
};

int main()
{
    try
    {
        XmlDocument^ myXMLDoc = gcnew XmlDocument;
        myXMLDoc->LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" 
            + "<title>Pride And Prejudice</title> </book>");
        Type^ myType = myXMLDoc->GetType();
      
        // Specify the TypeFilter delegate that compares the interfaces 
        // against filter criteria.
        TypeFilter^ myFilter = gcnew TypeFilter( 
            MyFindInterfacesSample::MyInterfaceFilter);
        array<String^>^myInterfaceList = {"System.Collections.IEnumerable",
            "System.Collections.ICollection"};
        for(int index = 0; index < myInterfaceList->Length; index++)
        {
            array<Type^>^myInterfaces = myType->FindInterfaces( 
                myFilter, myInterfaceList[index]);
            if(myInterfaces->Length > 0)
            {
                Console::WriteLine("\n{0} implements the interface {1}.", 
                    myType, myInterfaceList[index]);
                for(int j = 0; j < myInterfaces->Length; j++)
                Console::WriteLine("Interfaces supported: {0}.",
                    myInterfaces[j]);
            }
            else
                Console::WriteLine(
                    "\n{0} does not implement the interface {1}.", 
                    myType, myInterfaceList[index]);

        }
    }
    catch(ArgumentNullException^ e) 
    {
        Console::WriteLine("ArgumentNullException: {0}", e->Message);
    }
    catch(TargetInvocationException^ e) 
    {
        Console::WriteLine("TargetInvocationException: {0}", e->Message);
    }
    catch(Exception^ e) 
    {
        Console::WriteLine("Exception: {0}", e->Message);
    }
}
using System;
using System.Xml;
using System.Reflection;

public class MyFindInterfacesSample
{
    public static void Main()
    {
        try
        {
            XmlDocument myXMLDoc = new XmlDocument();
            myXMLDoc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" + "</book>");
            Type myType = myXMLDoc.GetType();

            // Specify the TypeFilter delegate that compares the
            // interfaces against filter criteria.
            TypeFilter myFilter = new TypeFilter(MyInterfaceFilter);
            String[] myInterfaceList = new String[2]
                {"System.Collections.IEnumerable",
                "System.Collections.ICollection"};
            for(int index=0; index < myInterfaceList.Length; index++)
            {
                Type[] myInterfaces = myType.FindInterfaces(myFilter,
                    myInterfaceList[index]);
                if (myInterfaces.Length > 0)
                {
                    Console.WriteLine("\n{0} implements the interface {1}.",
                        myType, myInterfaceList[index]);	
                    for(int j =0;j < myInterfaces.Length;j++)
                        Console.WriteLine("Interfaces supported: {0}.",
                            myInterfaces[j].ToString());
                }
                else
                    Console.WriteLine(
                        "\n{0} does not implement the interface {1}.",
                        myType,myInterfaceList[index]);	
            }
        }
        catch(ArgumentNullException e)
        {
            Console.WriteLine("ArgumentNullException: " + e.Message);
        }
        catch(TargetInvocationException e)
        {
            Console.WriteLine("TargetInvocationException: " + e.Message);
        }
        catch(Exception e)
        {
            Console.WriteLine("Exception: " + e.Message);
        }
    }

    public static bool MyInterfaceFilter(Type typeObj,Object criteriaObj)
    {
        if(typeObj.ToString() == criteriaObj.ToString())
            return true;
        else
            return false;
    }
}

Imports System.Xml
Imports System.Reflection

Public Class MyFindInterfacesSample
    Public Shared Sub Main()
        Try
            Dim myXMLDoc As New XmlDocument()
            myXMLDoc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" _
                & "<title>Pride And Prejudice</title>" & "</book>")
            Dim myType As Type = myXMLDoc.GetType()

            ' Specify the TypeFilter delegate that compares the 
            ' interfaces against filter criteria.
            Dim myFilter As New TypeFilter(AddressOf MyInterfaceFilter)
            Dim myInterfaceList() As String = _
                {"System.Collections.IEnumerable", _
                "System.Collections.ICollection"}
            Dim index As Integer
            For index = 0 To myInterfaceList.Length - 1
                Dim myInterfaces As Type() = _
                    myType.FindInterfaces(myFilter, myInterfaceList(index))
                If myInterfaces.Length > 0 Then
                    Console.WriteLine(ControlChars.Cr & _
                        "{0} implements the interface {1}.", _
                        myType, myInterfaceList(index))
                    Dim j As Integer
                    For j = 0 To myInterfaces.Length - 1
                        Console.WriteLine("Interfaces supported: {0}", _
                            myInterfaces(j).ToString())
                    Next j
                Else
                    Console.WriteLine(ControlChars.Cr & _
                        "{0} does not implement the interface {1}.", _
                        myType, myInterfaceList(index))
                End If
            Next index
        Catch e As ArgumentNullException
            Console.WriteLine("ArgumentNullException: " & e.Message)
        Catch e As TargetInvocationException
            Console.WriteLine("TargetInvocationException: " & e.Message)
        Catch e As Exception
            Console.WriteLine("Exception: " & e.Message)
        End Try
    End Sub
    Public Shared Function MyInterfaceFilter(ByVal typeObj As Type, _
        ByVal criteriaObj As [Object]) As Boolean
        If typeObj.ToString() = criteriaObj.ToString() Then
            Return True
        Else
            Return False
        End If
    End Function 'MyInterfaceFilter 
End Class

Comentarios

Este método se puede invalidar mediante una clase derivada.This method can be overridden by a derived class.

Module.FilterTypeName Module.FilterTypeNameIgnoreCase También se pueden utilizar los delegados y proporcionados por la System.Reflection.Module clase, en lugar del System.Reflection.TypeFilter delegado.The Module.FilterTypeName and Module.FilterTypeNameIgnoreCase delegates supplied by the System.Reflection.Module class may also be used, in lieu of the System.Reflection.TypeFilter delegate.

Todas las interfaces implementadas por esta clase se tienen en cuenta durante la búsqueda, ya sea declaradas por una clase base o por la propia clase.All of the interfaces implemented by this class are considered during the search, whether declared by a base class or this class itself.

Este método busca en la jerarquía de clases base y devuelve cada una de las interfaces coincidentes que implementa cada clase, así como todas las interfaces coincidentes que implementa cada una de esas interfaces (es decir, se devuelve el cierre transitivo de las interfaces coincidentes).This method searches the base class hierarchy, returning each of the matching interfaces each class implements as well as all the matching interfaces each of those interfaces implements (that is, the transitive closure of the matching interfaces is returned). No se devuelve ninguna interfaz duplicada.No duplicate interfaces are returned.

Si el actual Type representa un parámetro de tipo en la definición de un tipo genérico o de un método genérico, FindInterfaces busca todas las interfaces declaradas en las restricciones en el parámetro de tipo y todas las interfaces heredadas a través de las interfaces declaradas en las restricciones.If the current Type represents a type parameter in the definition of a generic type or generic method, FindInterfaces searches all the interfaces declared in the constraints on the type parameter, and all interfaces inherited through the interfaces declared in the constraints. Si el actual Type representa un argumento de tipo de un tipo genérico, FindInterfaces busca en todas las interfaces implementadas por el tipo, independientemente de si coinciden con las restricciones.If the current Type represents a type argument of a generic type, FindInterfaces searches all the interfaces implemented by the type, whether or not they match constraints.

Nota

FindInterfaces puede devolver interfaces genéricas, incluso en tipos que no son genéricos.FindInterfaces can return generic interfaces, even on types that are not generic. Por ejemplo, un tipo no genérico podría implementar IEnumerable<int> ( IEnumerable(Of Integer) en Visual Basic).For example, a nongeneric type might implement IEnumerable<int> (IEnumerable(Of Integer) in Visual Basic).

Se aplica a

Consulte también