Type.IsArrayImpl Methode

Definition

Implementiert beim Überschreiben in einer abgeleiteten Klasse die IsArray-Eigenschaft und bestimmt, ob Type ein Array ist.When overridden in a derived class, implements the IsArray property and determines whether the Type is an array.

protected:
 abstract bool IsArrayImpl();
protected abstract bool IsArrayImpl ();
abstract member IsArrayImpl : unit -> bool
Protected MustOverride Function IsArrayImpl () As Boolean

Gibt zurück

true, wenn Type ein Array ist, andernfalls false.true if the Type is an array; otherwise, false.

Beispiele

Im folgenden Beispiel wird die IsArrayImpl -Methode in der MyTypeDelegator -Klasse überschrieben, es wird überprüft, ob eine Variable ein Array ist, und das Ergebnis wird angezeigt.The following example overrides the IsArrayImpl method in the MyTypeDelegator class, checks if a variable is an array, and displays the result.

using namespace System;
using namespace System::Reflection;
public ref class MyTypeDelegator: public TypeDelegator
{
public:
   String^ myElementType;
   Type^ myType;
   MyTypeDelegator( Type^ myType )
      : TypeDelegator( myType )
   {
      this->myType = myType;
   }


protected:

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

      
      // Return false if the type is not an array.
      return false;
   }

};

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

}

using System;
using System.Reflection;
public class MyTypeDelegator : TypeDelegator
{
    public string myElementType = null;
    public Type myType;
    public MyTypeDelegator(Type myType) : base(myType)
    {
        this.myType = myType;
    }
    // Override IsArrayImpl().
    protected override bool IsArrayImpl()
    {
        // Determine whether the type is an array.
        if(myType.IsArray)
        {
            myElementType = "array";
            return true;
        }
        // Return false if the type is not an array.
        return false;  
    }
}
public class Type_IsArrayImpl
{
    public static void Main()
    {
        try
        {
            int myInt = 0 ; 
            // Create an instance of an array element.
            int[] myArray = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            Console.WriteLine("\nDetermine whether the variable is an array.\n");
            // Determine whether myType is an array type.  
            if( myType.IsArray)
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType);
            else
                Console.WriteLine("myArray is not an array.");
            myType = new MyTypeDelegator(myInt.GetType());

            // Determine whether myType is an array type. 
            if( myType.IsArray)
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType);
            else
                Console.WriteLine("myInt is not an array.");
        }
        catch( Exception e )
        {
            Console.WriteLine("Exception: {0}", e.Message );
        }
    }
}
Imports System.Reflection

Public Class MyTypeDelegator
    Inherits TypeDelegator
    Public myElementType As String = Nothing
    Public myType As Type
    Public Sub New(ByVal myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub
    ' Override IsArrayImpl().
    Protected Overrides Function IsArrayImpl() As Boolean
        ' Determine whether the type is an array.
        If myType.IsArray Then
            myElementType = "array"
            Return True
        End If
        ' Return false if the type is not an array.
        Return False
    End Function 'IsArrayImpl
End Class

Public Class Type_IsArrayImpl
    Public Shared Sub Main()
        Try
            Dim myInt As Integer = 0
            ' Create an instance of an array element.
            Dim myArray(4) As Integer
            Dim myType As New MyTypeDelegator(myArray.GetType())
            Console.WriteLine(ControlChars.NewLine + "Determine whether the variable is an array." + ControlChars.NewLine)
            ' Determine whether 'myType' is an array type.  
            If myType.IsArray Then
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType)
            Else
                Console.WriteLine("myArray is not an array.")
            End If
            myType = New MyTypeDelegator(myInt.GetType())
            ' Determine whether myType is an array type. 
            If myType.IsArray Then
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType)
            Else
                Console.WriteLine("myInt is not an array.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub
End Class

Hinweise

Eine Instanz der Array -Klasse muss zurück false geben, da es sich um ein Objekt und nicht um ein Array handelt.An instance of the Array class must return false because it is an object, not an array.

Gilt für:

Siehe auch