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Type.IsValueTypeImpl Method

Implements the IsValueType property and determines whether the Type is a value type; that is, not a class or an interface.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

protected:
virtual bool IsValueTypeImpl ()
protected boolean IsValueTypeImpl ()
protected function IsValueTypeImpl () : boolean

Return Value

true if the Type is a value type; otherwise, false.

Value types describe values that are represented as sequences of bits; value types are not classes or interfaces. These are referred to as "structs" in some programming languages. Enums are value types.

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 'IsValueTypeImpl()' method of 'Type' class.
   virtual bool IsValueTypeImpl() override 
   {
      
      // Determine whether the type is a value type.
      if ( myType->IsValueType )
      {
         myElementType = "value";
         return true;
      }

      
      // The type is not value type.
      return false;
   }

};

public ref class MyClass{};

int main()
{
   try
   {
      int myInt = 0;
      MyClass^ myClass = gcnew MyClass;
      MyTypeDelegator^ myType = gcnew MyTypeDelegator( myInt.GetType() );
      Console::WriteLine( "\nCheck whether a variable refers to a value type.\n" );
      
      // Determine whether 'myType' is a value type.
      if ( myType->IsValueType )
            Console::WriteLine( "\n'myInt' is a {0} type.", myType->myElementType );
      else
            Console::WriteLine( "\n'myInt' is not a value type." );
      myType = gcnew MyTypeDelegator( myClass->GetType() );
      
      // Determine whether 'myType' is a value type.
      if ( myType->IsValueType )
            Console::WriteLine( "\n'myClass' is a {0} type.", myType->myElementType );
      else
            Console::WriteLine( "\n'myClass' is not a value type." );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "\nThe following exception is raised: {0}", e->Message );
   }

}


import System.*;
import System.Reflection.*;
public class MyTypeDelegator extends TypeDelegator
{
    public String myElementType = null;
    private Type myType = null;

    public MyTypeDelegator(Type myType)
    {
        super(myType);
        this.myType = myType;
    } //MyTypeDelegator

    // Override 'IsValueTypeImpl()' method of 'Type' class.
    protected boolean IsValueTypeImpl()
    {
        // Determine whether the type is a value type.
        if (myType.get_IsValueType()) {
            myElementType = "value";
            return true;
        }
        // The type is not value type.
        return false;
    } //IsValueTypeImpl
} //MyTypeDelegator

public class Type_IsValueTypeImpl
{
    static public class MyClass
    {
    } //MyClass

    public static void main(String[] args)
    {
        try {
            int myInt = 0;
            MyClass myClass = new MyClass();

            MyTypeDelegator myType = new MyTypeDelegator(((System.
                Int32)myInt).GetType());
            Console.WriteLine("\nCheck whether a variable refers to" 
                + " a value type.\n");
            // Determine whether 'myType' is a value type.  
            if (myType.get_IsValueType()) {
                Console.WriteLine("\n'myInt' is a {0} type.",
                    myType.myElementType);
            }
            else {
                Console.WriteLine("\n'myInt' is not a value type.");
            }
            myType = new MyTypeDelegator(myClass.GetType());
            // Determine whether 'myType' is a value type.  
            if (myType.get_IsValueType()) {
                Console.WriteLine("\n'myClass' is a {0} type.",
                    myType.myElementType);
            }
            else {
                Console.WriteLine("\n'myClass' is not a value type.");
            }
        }
        catch (System.Exception e)
        {
            Console.WriteLine("\nThe following exception is raised:" 
                + e.get_Message());
        }
    } //main
} //Type_IsValueTypeImpl

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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