Type.FindInterfaces(TypeFilter, Object) Método

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

Devoluciones

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.

Implementaciones

Excepciones

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.

#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;
    }
}

open System
open System.Xml
open System.Reflection

let myInterfaceFilter (typeObj: Type) (criteriaObj: obj) =
    string typeObj = string criteriaObj

try
    let myXMLDoc = XmlDocument()
    myXMLDoc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" + "<title>Pride And Prejudice</title>" + "</book>")
    let myType = myXMLDoc.GetType()

    // Specify the TypeFilter delegate that compares the
    // interfaces against filter criteria.
    let myFilter = TypeFilter myInterfaceFilter
    let myInterfaceList =
        [ "System.Collections.IEnumerable"
          "System.Collections.ICollection" ]
    for i in myInterfaceList do
        let myInterfaces = myType.FindInterfaces(myFilter, i)
        if myInterfaces.Length > 0 then
            printfn $"\n{myType} implements the interface {i}."
            for j in myInterfaces do
                printfn $"Interfaces supported: {j}."
        else
            printfn $"\n{myType} does not implement the interface {i}."
with
| :? ArgumentNullException as e ->
    printfn $"ArgumentNullException: {e.Message}"
| :? TargetInvocationException as e ->
    printfn $"TargetInvocationException: {e.Message}"
| e ->
    printfn $"Exception: {e.Message}"

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.

También se pueden usar los Module.FilterTypeName delegados y Module.FilterTypeNameIgnoreCase proporcionados por la System.Reflection.Module clase , en lugar del System.Reflection.TypeFilter delegado.

Todas las interfaces implementadas por esta clase se consideran durante la búsqueda, ya sea declaradas por una clase base o por esta clase en sí.

Este método busca en la jerarquía de clases base, devolviendo 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). No se devuelven interfaces duplicadas.

Si el actual Type representa un parámetro de tipo en la definición de un tipo genérico o un método genérico, FindInterfaces busca en 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. Si el objeto 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 o no con restricciones.

Se aplica a

Consulte también

• Module
• TypeFilter
• GetInterface(String)
• GetInterfaces()