FieldInfo.Attributes プロパティ
アセンブリ: mscorlib (mscorlib.dll 内)
構文
Public MustOverride ReadOnly Property Attributes As FieldAttributes
public abstract FieldAttributes Attributes { get; }
このフィールドの FieldAttributes。
すべてのメンバには、メンバの特定の型に応じて定義されている一連の属性があります。FieldAttributes は、このフィールドがプライベート フィールドまたは静的フィールドのいずれであるかなどを通知します。
Attributes プロパティを取得するには、最初に Type クラスを取得します。そして、その Type から FieldInfo を取得します。そして、その FieldInfo から Attributes を取得します。
3 つのフィールドを作成し、そのフィールド属性を表示するコード例を次に示します。FieldAttributes 値には、3 番目のフィールドで示すように、Public と Literal の両方など、複数の属性を含めることができます。
Imports System Imports System.Reflection Imports Microsoft.VisualBasic Public Class Demo ' Declare three fields. ' The first field is private. Private m_field As String = "String A" 'The second field is public. Public Field As String = "String B" ' The third field is public and const, hence also static ' and literal with a default value. Public Const FieldC As String = "String C" End Class Module Module1 Sub Main() ' Create an instance of the Demo class. Dim d As New Demo() Console.WriteLine(vbCrLf & "Reflection.FieldAttributes") ' Get a Type object for Demo, and a FieldInfo for each of ' the three fields. Use the FieldInfo to display field ' name, value for the Demo object in d, and attributes. ' Dim myType As Type = GetType(Demo) Dim fiPrivate As FieldInfo = myType.GetField("m_field", _ BindingFlags.NonPublic Or BindingFlags.Instance) DisplayField(d, fiPrivate) Dim fiPublic As FieldInfo = myType.GetField("Field", _ BindingFlags.Public Or BindingFlags.Instance) DisplayField(d, fiPublic) Dim fiConstant As FieldInfo = myType.GetField("FieldC", _ BindingFlags.Public Or BindingFlags.Static) DisplayField(d, fiConstant) End Sub Sub DisplayField(ByVal obj As Object, ByVal f As FieldInfo) ' Display the field name, value, and attributes. ' Console.WriteLine("{0} = ""{1}""; attributes: {2}", _ f.Name, f.GetValue(obj), f.Attributes) End Sub End Module ' This code example produces the following output: ' 'm_field = "String A"; attributes: Private 'Field = "String B"; attributes: Public 'FieldC = "String C"; attributes: Public, Static, Literal, HasDefault
using System; using System.Reflection; public class Demo { // Make three fields: // The first field is private. private string m_field = "String A"; // The second field is public. public string Field = "String B"; // The third field is public const (hence also literal and static) , // with a default value. public const string FieldC = "String C"; } public class Myfieldattributes { public static void Main() { Console.WriteLine ("\nReflection.FieldAttributes"); Demo d = new Demo(); // Get a Type object for Demo, and a FieldInfo for each of // the three fields. Use the FieldInfo to display field // name, value for the Demo object in d, and attributes. // Type myType = typeof(Demo); FieldInfo fiPrivate = myType.GetField("m_field", BindingFlags.NonPublic | BindingFlags.Instance); DisplayField(d, fiPrivate); FieldInfo fiPublic = myType.GetField("Field", BindingFlags.Public | BindingFlags.Instance); DisplayField(d, fiPublic); FieldInfo fiConstant = myType.GetField("FieldC", BindingFlags.Public | BindingFlags.Static); DisplayField(d, fiConstant); } static void DisplayField(Object obj, FieldInfo f) { // Display the field name, value, and attributes. // Console.WriteLine("{0} = \"{1}\"; attributes: {2}", f.Name, f.GetValue(obj), f.Attributes); } } /* This code example produces the following output: Reflection.FieldAttributes m_field = "String A"; attributes: Private Field = "String B"; attributes: Public FieldC = "String C"; attributes: Public, Static, Literal, HasDefault */
using namespace System; using namespace System::Reflection; using namespace System::Security::Permissions; public ref class Demo { private: // Make three fields: // The first field is private. String^ m_field; // The second field is public. public: String^ Field; // The third field is public and literal. literal String^ FieldC = "String C"; Demo() { m_field = "String A"; Field = "String B"; } }; static void DisplayField(Object^ obj, FieldInfo^ f) { // Display the field name, value, and attributes. // Console::WriteLine("{0} = \"{1}\"; attributes: {2}", f->Name, f->GetValue(obj), f->Attributes); }; void main() { Console::WriteLine ("\nReflection.FieldAttributes"); Demo^ d = gcnew Demo(); // Get a Type object for Demo, and a FieldInfo for each of // the three fields. Use the FieldInfo to display field // name, value for the Demo object in d, and attributes. // Type^ myType = Demo::typeid; FieldInfo^ fiPrivate = myType->GetField("m_field", BindingFlags::NonPublic | BindingFlags::Instance); DisplayField(d, fiPrivate); FieldInfo^ fiPublic = myType->GetField("Field", BindingFlags::Public | BindingFlags::Instance); DisplayField(d, fiPublic); FieldInfo^ fiConstant = myType->GetField("FieldC", BindingFlags::Public | BindingFlags::Static); DisplayField(d, fiConstant); } /* This code example produces the following output: Reflection.FieldAttributes m_field = "String A"; attributes: Private Field = "String B"; attributes: Public FieldC = "String C"; attributes: Public, Static, Literal, HasDefault */
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。
参照
_FieldInfo.Attributes プロパティ
アセンブリ: mscorlib (mscorlib.dll 内)
構文
ReadOnly Property Attributes As FieldAttributes
FieldAttributes Attributes { get; }
property FieldAttributes Attributes { FieldAttributes get (); }
function get Attributes () : FieldAttributes
このフィールドの FieldAttributes。
プラットフォーム
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。
参照
- _FieldInfo.Attributesのページへのリンク