OidEnumerator.Current プロパティ

.NET Framework クラス ライブラリ リファレンス

OidEnumerator.Current プロパティ

メモ : このプロパティは、.NET Framework version 2.0 で新しく追加されたものです。

OidCollection オブジェクト内の現在の Oid オブジェクトを取得します。

名前空間: System.Security.Cryptography
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

Public ReadOnly Property
 Current As Oid

Visual Basic (使用法)

Dim instance As OidEnumerator
Dim value As Oid

value = instance.Current

C#

public Oid Current { get; }

C++

public:
property Oid^ Current {
    Oid^ get ();
}

J#

/** @property */
public Oid get_Current ()

JScript

public function get Current
 () : Oid

プロパティ値
コレクション内の現在の Oid オブジェクト。

解説

列挙子を作成した後に、コレクションの最初の要素に列挙子を進めるためには、Current プロパティの値を読み取る前に MoveNext メソッドを呼び出す必要があります。それ以外の場合、Current は null 参照 (Visual Basic では Nothing) を返すか、例外をスローします。

MoveNext への最後の呼び出しで、コレクションの末尾に達したことを示す false が返された場合も、Current は null 参照 (Visual Basic では Nothing) を返すか、例外をスローします。

Current は列挙子の位置を移動しません。そのため、Current を連続して呼び出した場合、MoveNext が呼び出されるまで同じオブジェクトが返されます。

使用例

OidEnumerator クラスを使用するコード例を次に示します。

Visual Basic

Imports System
Imports System.Security.Cryptography


Public Class OidSample
   Shared msg As String
   Public Shared Sub Main()
      ' Assign values to strings.
      Dim Value1 As String
 = "1.2.840.113549.1.1.1"
      Dim Name1 As String
 = "3DES"
      Dim Value2 As String
 = "1.3.6.1.4.1.311.20.2"
      Dim InvalidName As String
 = "This name is not a valid name"
      Dim InvalidValue As String
 = "1.1.1.1.1.1.1.1"
      
      ' Create new Oid objects using the specified values.
      ' Note that the corresponding Value or Friendly Name property
 is automatically added to the object.
      Dim o1 As New Oid(Value1)
      Dim o2 As New Oid(Name1)
      
      ' Create a new Oid object using the specified Value and Friendly
 Name properties.
      ' Note that the two are not compared to determine if the Value
 is associated 
      '  with the Friendly Name.
      Dim o3 As New Oid(Value2,
 InvalidName)
      
      'Create a new Oid object using the specified Value. Note that
 if the value
      '  is invalid or not known, no value is assigned to the Friendly
 Name property.
      Dim o4 As New Oid(InvalidValue)
      
      'Write out the property information of the Oid objects.
    msg = "Oid1: Automatically assigned Friendly Name: "
 & o1.FriendlyName & ", " & o1.Value
    MsgBox(msg)
      'Console.WriteLine("Oid1: Automatically assigned Friendly
 Name: {0}, {1}", o1.FriendlyName, o1.Value)


      'Console.WriteLine("Oid2: Automatically assigned Value: {0},
 {1}", o2.FriendlyName, o2.Value)
    msg = "Oid2: Automatically assigned Value: " &
 o2.FriendlyName & ", " & o2.Value
    MsgBox(msg)


      'Console.WriteLine("Oid3: Name and Value not compared: {0},
 {1}", o3.FriendlyName, o3.Value)
    msg = "Oid3: Name and Value not compared: " &
 o3.FriendlyName & ", " & o3.Value
    MsgBox(msg)



     ' Console.WriteLine("Oid4: Invalid Value used: {0}, {1} {2}",
 o4.FriendlyName, o4.Value, Environment.NewLine)
    msg = "Oid4: Invalid Value used: " & o4.FriendlyName
 & ", " & o4.Value
    MsgBox(msg)
 

     
      'Create an Oid collection and add several Oid objects.
      Dim oc As New OidCollection()
      oc.Add(o1)
      oc.Add(o2)
      oc.Add(o3)
     ' Console.WriteLine("Number of Oids in the collection: {0}",
 oc.Count)
      ' Console.WriteLine("Is synchronized: {0} {1}", oc.IsSynchronized,
 Environment.NewLine)

    msg = "Number of Oids in the collection: " &
 oc.Count
    MsgBox(msg)
    msg = "Is synchronized: " & oc.IsSynchronized
    MsgBox(msg)

      
      'Create an enumerator for moving through the collection.
      Dim oe As OidEnumerator = oc.GetEnumerator()
      'You must execute a MoveNext() to get to the first item in the
 collection.
      oe.MoveNext()
      ' Write out Oids in the collection.
      'Console.WriteLine("First Oid in collection: {0},{1}",
 oe.Current.FriendlyName, oe.Current.Value)
    msg = "First Oid in collection: " & oe.Current.FriendlyName
 & ", " & oe.Current.Value
    MsgBox(msg)

      oe.MoveNext()
     ' Console.WriteLine("Second Oid in collection: {0},{1}",
 oe.Current.FriendlyName, oe.Current.Value)
    msg = "Second Oid in collection: " & oe.Current.FriendlyName
 & ", " & oe.Current.Value
    MsgBox(msg)

      'Return index in the collection to the beginning.
      oe.Reset()
   End Sub 'Main
End Class 'OidSample

C#

using System;
using System.Security.Cryptography;
public class OidSample
{
    public static void Main()
    {
        // Assign values to strings.
        string Value1 = "1.2.840.113549.1.1.1";
        string Name1 = "3DES";
        string Value2 = "1.3.6.1.4.1.311.20.2";
        string InvalidName = "This name is not a valid name";
        string InvalidValue = "1.1.1.1.1.1.1.1";

        // Create new Oid objects using the specified values.
        // Note that the corresponding Value or Friendly Name property
 is automatically added to the object.
        Oid o1 = new Oid(Value1);
        Oid o2 = new Oid(Name1);

        // Create a new Oid object using the specified Value and Friendly
 Name properties.
        // Note that the two are not compared to determine if the Value
 is associated 
        //  with the Friendly Name.
        Oid o3 = new Oid(Value2, InvalidName);

        //Create a new Oid object using the specified Value. Note that
 if the value
        //  is invalid or not known, no value is assigned to the Friendly
 Name property.
        Oid o4 = new Oid(InvalidValue);

        //Write out the property information of the Oid objects.
        Console.WriteLine("Oid1: Automatically assigned Friendly Name: {0},
 {1}", o1.FriendlyName, o1.Value);
        Console.WriteLine("Oid2: Automatically assigned Value: {0}, {1}",
 o2.FriendlyName, o2.Value);
        Console.WriteLine("Oid3: Name and Value not compared: {0}, {1}",
 o3.FriendlyName, o3.Value);
        Console.WriteLine("Oid4: Invalid Value used: {0}, {1} {2}", o4.FriendlyName,
 o4.Value, Environment.NewLine);

        //Create an Oid collection and add several Oid objects.
        OidCollection oc = new OidCollection();
        oc.Add(o1);
        oc.Add(o2);
        oc.Add(o3);
        Console.WriteLine("Number of Oids in the collection:
 {0}", oc.Count);
        Console.WriteLine("Is synchronized: {0} {1}", oc.IsSynchronized,
 Environment.NewLine);

        //Create an enumerator for moving through the collection.
        OidEnumerator oe = oc.GetEnumerator();
        //You must execute a MoveNext() to get to the first item in
 the collection.
        oe.MoveNext();
        // Write out Oids in the collection.
        Console.WriteLine("First Oid in collection: {0},{1}",
 oe.Current.FriendlyName,oe.Current.Value);
        oe.MoveNext();
        Console.WriteLine("Second Oid in collection: {0}
,{1}",
 oe.Current.FriendlyName, oe.Current.Value);
        //Return index in the collection to the beginning.
        oe.Reset();
    }
}

C++

#using <system.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   
   // Assign values to strings.
   String^ Value1 = "1.2.840.113549.1.1.1";
   String^ Name1 = "3DES";
   String^ Value2 = "1.3.6.1.4.1.311.20.2";
   String^ InvalidName = "This name is not a valid name";
   String^ InvalidValue = "1.1.1.1.1.1.1.1";
   
   // Create new Oid objects using the specified values.
   // Note that the corresponding Value or Friendly Name property is
 automatically added to the object.
   Oid ^ o1 = gcnew Oid( Value1 );
   Oid ^ o2 = gcnew Oid( Name1 );
   
   // Create a new Oid object using the specified Value and Friendly
 Name properties.
   // Note that the two are not compared to determine if the Value is
 associated 
   //  with the Friendly Name.
   Oid ^ o3 = gcnew Oid( Value2,InvalidName );
   
   //Create a new Oid object using the specified Value. Note that if
 the value
   //  is invalid or not known, no value is assigned to the Friendly
 Name property.
   Oid ^ o4 = gcnew Oid( InvalidValue );
   
   //Write out the property information of the Oid objects.
   Console::WriteLine( "Oid1: Automatically assigned Friendly Name: {0}, {1}",
 o1->FriendlyName, o1->Value );
   Console::WriteLine( "Oid2: Automatically assigned Value: {0}, {1}",
 o2->FriendlyName, o2->Value );
   Console::WriteLine( "Oid3: Name and Value not compared: {0}, {1}", o3->FriendlyName,
 o3->Value );
   Console::WriteLine( "Oid4: Invalid Value used: {0}, {1} {2}", o4->FriendlyName,
 o4->Value, Environment::NewLine );
   
   //Create an Oid collection and add several Oid objects.
   OidCollection ^ oc = gcnew OidCollection;
   oc->Add( o1 );
   oc->Add( o2 );
   oc->Add( o3 );
   Console::WriteLine( "Number of Oids in the collection:
 {0}", oc->Count );
   Console::WriteLine( "Is synchronized: {0} {1}", oc->IsSynchronized,
 Environment::NewLine );
   
   //Create an enumerator for moving through the collection.
   OidEnumerator ^ oe = oc->GetEnumerator();
   
   //You must execute a MoveNext() to get to the first item in the collection.
   oe->MoveNext();
   
   // Write out Oids in the collection.
   Console::WriteLine( "First Oid in collection: {0},{1}",
 oe->Current->FriendlyName, oe->Current->Value );
   oe->MoveNext();
   Console::WriteLine( "Second Oid in collection: {0},{1}",
 oe->Current->FriendlyName, oe->Current->Value );
   
   //Return index in the collection to the beginning.
   oe->Reset();
}

J#

import System.*;
import System.Security.Cryptography.*;

public class OidSample
{
    public static void main(String
 args[])
    {
        // Assign values to strings.
        String value1 = "1.2.840.113549.1.1.1";
        String name1 = "3DES";
        String value2 = "1.3.6.1.4.1.311.20.2";
        String invalidName = "This name is not a valid name";
        String invalidValue = "1.1.1.1.1.1.1.1";
        // Create new Oid objects using the specified values.
        // Note that the corresponding Value or Friendly Name property
 
        // is automatically added to the object.
        Oid o1 = new Oid(value1);
        Oid o2 = new Oid(name1);
        // Create a new Oid object using the specified Value and Friendly
 
        // Name properties.
        // Note that the two are not compared to determine if the Value
 is 
        // associated with the Friendly Name.
        Oid o3 = new Oid(value2, invalidName);
        // Create a new Oid object using the specified Value. Note that
 if the
        // value is invalid or not known, no value is assigned to the
 Friendly 
        // Name property.
        Oid o4 = new Oid(invalidValue);
        //Write out the property information of the Oid objects.
        Console.WriteLine("Oid1: Automatically assigned Friendly Name: {0},
 {1}",
            o1.get_FriendlyName(), o1.get_Value());
        Console.WriteLine("Oid2: Automatically assigned Value: {0}, {1}",
 
            o2.get_FriendlyName(), o2.get_Value());
        Console.WriteLine("Oid3: Name and Value not compared: {0}, {1}",
 
            o3.get_FriendlyName(), o3.get_Value());
        Console.WriteLine("Oid4: Invalid Value used: {0}, {1} {2}", 
            o4.get_FriendlyName(), o4.get_Value(), Environment.get_NewLine());
        //Create an Oid collection and add several Oid objects.
        OidCollection oc = new OidCollection();
        oc.Add(o1);
        oc.Add(o2);
        oc.Add(o3);
        Console.WriteLine("Number of Oids in the collection:
 {0}", 
            System.Convert.ToString(oc.get_Count()));
        Console.WriteLine("Is synchronized: {0} {1}", 
            System.Convert.ToString(oc.get_IsSynchronized()), 
            Environment.get_NewLine());
        //Create an enumerator for moving through the collection.
        OidEnumerator oe = oc.GetEnumerator();
        //You must execute a MoveNext() to get to the first item in
 the
        //collection.
        oe.MoveNext();
        // Write out Oids in the collection.
        Console.WriteLine("First Oid in collection: {0},{1}",
 
            oe.get_Current().get_FriendlyName(), 
            oe.get_Current().get_Value());
        oe.MoveNext();
        Console.WriteLine("Second Oid in collection: {0}
,{1}",
            oe.get_Current().get_FriendlyName(), oe.get_Current().get_Value());
        //Return index in the collection to the beginning.
        oe.Reset();
    } //main
} //OidSample

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。

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
OidEnumerator クラス
OidEnumerator メンバ
System.Security.Cryptography 名前空間