Type.FindInterfaces(TypeFilter, Object) 方法

定義

命名空間:

System

組件:

System.Runtime.dll

來源:

Type.Helpers.cs

傳回 Type 物件的陣列，表示由目前 Type 所實作或繼承的介面的篩選清單。

public:
 virtual cli::array <Type ^> ^ FindInterfaces(System::Reflection::TypeFilter ^ filter, System::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()

參數

filter

TypeFilter

根據 filterCriteria 比較介面的委派。

filterCriteria

Object

判斷在傳回陣列中是否應包含介面的搜尋準則。

傳回

Type[]

Type 物件的陣列，表示由目前 Type 所實作或繼承介面的篩選清單，如果由目前 Type 所實作或繼承的介面都不符合篩選器，則為空陣列。

例外狀況

ArgumentNullException

filter 為 null。

TargetInvocationException

靜態初始設定式已叫用並擲回了例外狀況。

範例

下列範例會尋找由指定型別實作或繼承的指定介面，然後顯示介面名稱。

#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

備註

這個方法可由衍生類別覆寫。

Module.FilterTypeName您也可以使用 類別所提供的 System.Reflection.Module 和 Module.FilterTypeNameIgnoreCase 委派，而不是 System.Reflection.TypeFilter 委派。

搜尋期間會考慮這個類別實作的所有介面，無論是由基類或這個類別本身宣告。

這個方法會搜尋基類階層，傳回每個類別實作的每個相符介面，以及每個介面實作的所有相符介面 (，也就是會傳回比對介面的可轉移關閉) 。 不會傳回重複的介面。

如果目前的 Type 代表泛型型別或泛型方法定義中的型別參數， FindInterfaces 請在類型參數的條件約束中搜尋所有宣告的介面，以及透過條件約束中宣告的介面繼承的所有介面。 如果目前的 Type 代表泛型型別的型別引數，則 FindInterfaces 搜尋類型所實作的所有介面，不論它們是否符合條件約束。

注意

FindInterfaces 即使不是泛型的型別，也可以傳回泛型介面。 例如，非泛型型別可能會在 Visual Basic) 中實 IEnumerable<int> 作 (IEnumerable(Of Integer) 。

另請參閱

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