Type.HasElementTypeImpl 메서드

정의

네임스페이스:

System

어셈블리:

netstandard.dll, System.Runtime.dll

Source:

Type.cs

파생 클래스에서 재정의되면, HasElementType 속성을 구현하고 현재 Type이 다른 형식을 포함하거나 참조하는지 여부, 즉 현재 Type이 배열 또는 포인터이거나 참조로 전달되는지를 확인합니다.

protected:
 abstract bool HasElementTypeImpl();

protected abstract bool HasElementTypeImpl();

abstract member HasElementTypeImpl : unit -> bool

Protected MustOverride Function HasElementTypeImpl () As Boolean

반환

Boolean

true이 배열 또는 포인터이거나 참조로 전달되면 Type이고, 그렇지 않으면 false입니다.

예제

다음 예제에서는 클래스 MyTypeDelegator를 정의 합니다 재정의 HasElementTypeImpl 하는 메서드. 기본 클래스는 HasElementType 속성을 확인하고 요소 형식을 표시합니다.

using namespace System;
using namespace System::Reflection;
public ref class MyTypeDelegator: public TypeDelegator
{
public:
   String^ myElementType;

private:
   Type^ myType;

public:
   MyTypeDelegator( Type^ myType )
      : TypeDelegator( myType )
   {
      this->myType = myType;
   }


protected:

   // Override Type::HasElementTypeImpl().
   virtual bool HasElementTypeImpl() override
   {
      
      // Determine whether the type is an array.
      if ( myType->IsArray )
      {
         myElementType = "array";
         return true;
      }

      
      // Determine whether the type is a reference.
      if ( myType->IsByRef )
      {
         myElementType = "reference";
         return true;
      }

      
      // Determine whether the type is a pointer.
      if ( myType->IsPointer )
      {
         myElementType = "pointer";
         return true;
      }

      
      // Return false if the type is not a reference, array, or pointer type.
      return false;
   }

};

int main()
{
   try
   {
      int myInt = 0;
      array<Int32>^myArray = gcnew array<Int32>(5);
      MyTypeDelegator^ myType = gcnew MyTypeDelegator( myArray->GetType() );
      
      // Determine whether myType is an array, pointer, reference type.
      Console::WriteLine( "\nDetermine whether a variable is an array, pointer, or reference type.\n" );
      if ( myType->HasElementType )
            Console::WriteLine( "The type of myArray is {0}.", myType->myElementType );
      else
            Console::WriteLine( "myArray is not an array, pointer, or reference type." );
      myType = gcnew MyTypeDelegator( myInt.GetType() );
      
      // Determine whether myType is an array, pointer, reference type.
      if ( myType->HasElementType )
            Console::WriteLine( "The type of myInt is {0}.", myType->myElementType );
      else
            Console::WriteLine( "myInt is not an array, pointer, or reference type." );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: {0}", e->Message );
   }

}

using System;
using System.Reflection;
public class MyTypeDelegator : TypeDelegator
{
    public string myElementType = null;
    private Type myType = null ;
    public MyTypeDelegator(Type myType) : base(myType)
    {
        this.myType = myType;
    }
    // Override Type.HasElementTypeImpl().
    protected override bool HasElementTypeImpl()
    {
        // Determine whether the type is an array.
        if(myType.IsArray)
        {
            myElementType = "array";
            return true;
        }
        // Determine whether the type is a reference.
        if(myType.IsByRef)
        {
            myElementType = "reference";
            return true;
        }
        // Determine whether the type is a pointer.
        if(myType.IsPointer)
        {
            myElementType = "pointer";
            return true;
        }
        // Return false if the type is not a reference, array, or pointer type.
        return false;
    }
}
public class Type_HasElementTypeImpl
{
    public static void Main()
    {
        try
        {
            int myInt = 0 ;
            int[] myArray = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            // Determine whether myType is an array, pointer, reference type.
            Console.WriteLine("\nDetermine whether a variable is an array, pointer, or reference type.\n");
            if( myType.HasElementType)
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType);
            else
                Console.WriteLine("myArray is not an array, pointer, or reference type.");
            myType = new MyTypeDelegator(myInt.GetType());
            // Determine whether myType is an array, pointer, reference type.
            if( myType.HasElementType)
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType);
            else
                Console.WriteLine("myInt is not an array, pointer, or reference type.");
        }
        catch( Exception e )
        {
            Console.WriteLine("Exception: {0}", e.Message);
        }
    }
}

open System.Reflection

type MyTypeDelegator(myType) =
    inherit TypeDelegator(myType)
    
    [<DefaultValue>]
    val mutable public myElementType: string
    
    // Override Type.HasElementTypeImpl().
    override this.HasElementTypeImpl() =
        // Determine whether the type is an array.
        if myType.IsArray then
            this.myElementType <- "array"
            true
        // Determine whether the type is a reference.
        elif myType.IsByRef then
            this.myElementType <- "reference"
            true
        // Determine whether the type is a pointer.
        elif myType.IsPointer then
            this.myElementType <- "pointer"
            true
        // Return false if the type is not a reference, array, or pointer type.
        else false

try
    let myInt = 0 
    let myArray = Array.zeroCreate<int> 5
    let myType = MyTypeDelegator(myArray.GetType())
    // Determine whether myType is an array, pointer, reference type.
    printfn "\nDetermine whether a variable is an array, pointer, or reference type.\n"
    if myType.HasElementType then
        printfn $"The type of myArray is {myType.myElementType}."
    else
        printfn "myArray is not an array, pointer, or reference type."
    let myType = MyTypeDelegator(myInt.GetType())
    // Determine whether myType is an array, pointer, reference type.
    if myType.HasElementType then
        printfn $"The type of myInt is {myType.myElementType}."
    else
        printfn "myInt is not an array, pointer, or reference type."
with e ->
    printfn $"Exception: {e.Message}"

Imports System.Reflection

Public Class MyTypeDelegator
    Inherits TypeDelegator
    Public myElementType As String = Nothing
    Private myType As Type = Nothing
    Public Sub New(ByVal myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub
    ' Override Type.HasElementTypeImpl().
    Protected Overrides Function HasElementTypeImpl() As Boolean
        ' Determine whether the type is an array.
        If myType.IsArray Then
            myElementType = "array"
            Return True
        End If
        ' Determine whether the type is a reference.
        If myType.IsByRef Then
            myElementType = "reference"
            Return True
        End If
        ' Determine whether the type is a pointer.
        If myType.IsPointer Then
            myElementType = "pointer"
            Return True
        End If
        ' The type is not a reference, array, or pointer type.
        Return False
    End Function 'HasElementTypeImpl
End Class
Public Class Type_HasElementTypeImpl
    Public Shared Sub Main()
        Try
            Dim myInt As Integer = 0
            Dim myArray(4) As Integer
            Dim myType As New MyTypeDelegator(myArray.GetType())
            Console.WriteLine(ControlChars.NewLine + "Determine whether a variable refers to an array or pointer or reference type." + ControlChars.NewLine)
            ' Determine whether myType is an array, pointer, reference type.  
            If myType.HasElementType Then
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType.ToString())
            Else
                Console.WriteLine("myArray is not an array, pointer, or reference type.")
            End If
            myType = New MyTypeDelegator(myInt.GetType())
            ' Determine whether myType is an array, pointer, reference type. 
            If myType.HasElementType Then
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType.ToString())
            Else
                Console.WriteLine("myInt is not an array, pointer, or reference type.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub
End Class

설명

예를 들어 Type.GetType("Int32[]")입니다. HasElementTypeImpl은 를 반환하지만 Type.GetType("Int32")을 반환 true합니다. HasElementTypeImpl은 를 반환합니다 false. HasElementTypeImpl은 "Int32*" 및 "Int32&"에 대해서도 반환 true 합니다.

추가 정보

• HasElementType
• IsArray
• IsPointer
• IsByRef
• GetElementType()
• GetType()