Type.IsByRef プロパティ
アセンブリ: mscorlib (mscorlib.dll 内)



IsByRef プロパティを使用して、指定した型が参照渡しされるかどうかをチェックする例を次に示します。この例では、HasElementTypeImpl メソッドをオーバーライドした MyTypeDelegator クラスを定義します。メインのクラスは、HasElementType プロパティをチェックして、要素の型を表示します。
Imports System Imports System.Reflection Imports Microsoft.VisualBasic 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 'New ' 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 'MyTypeDelegator 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 'Main End Class 'Type_HasElementTypeImpl
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); } } }
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
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


_Type.IsByRef プロパティ
アセンブリ: mscorlib (mscorlib.dll 内)



Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


- Type.IsByRefのページへのリンク