Type.IsByRef Property
Assembly: mscorlib (in mscorlib.dll)
To get to the actual type, dereference the type that was passed by reference, and then call GetElementType on that type.
The following example demonstrates a use of the IsByRef property to check whether a specified type is passed by reference. The example defines the class MyTypeDelegator, which overrides the HasElementTypeImpl method. The main class checks for the HasElementType property and displays the element type.
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 ); } }
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 Type.HasElementTypeImpl().
protected boolean HasElementTypeImpl()
{
// Determine whether the type is an array.
if (myType.get_IsArray()) {
myElementType = "array";
return true;
}
// Determine whether the type is a reference.
if (myType.get_IsByRef()) {
myElementType = "reference";
return true;
}
// Determine whether the type is a pointer.
if (myType.get_IsPointer()) {
myElementType = "pointer";
return true;
}
// Return false if the type is not a reference, array, or pointer type.
return false;
} //HasElementTypeImpl
} //MyTypeDelegator
public class Type_HasElementTypeImpl
{
public static void main(String[] args)
{
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.get_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(((System.Int32)myInt).GetType());
// Determine whether myType is an array, pointer, reference type.
if (myType.get_HasElementType()) {
Console.WriteLine("The type of myInt is {0}.", myType.
myElementType);
}
else {
Console.WriteLine("myInt is not an array, pointer,"
+ " or reference type.");
}
}
catch (System.Exception e) {
Console.WriteLine("Exception: {0}", e.get_Message());
}
} //main
} //Type_HasElementTypeImpl
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.