OidEnumerator.MoveNext Metodo

public:
 virtual bool MoveNext();

public bool MoveNext ();

abstract member MoveNext : unit -> bool
override this.MoveNext : unit -> bool

Public Function MoveNext () As Boolean

Restituisce

true se l'enumeratore è stato spostato correttamente in avanti in corrispondenza dell'elemento successivo; false, se l'enumeratore ha superato la fine dell'insieme.

Implementazioni

Eccezioni

Esempio

Nell'esempio di codice seguente viene illustrato l'utilizzo della classe OidEnumerator.

#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();
}

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();
    }
}

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
End Class

Commenti

Dopo aver creato un enumeratore, viene posizionato prima del primo elemento della raccolta e la prima chiamata al MoveNext metodo sposta l'enumeratore sul primo elemento della raccolta. Le chiamate successive per MoveNext avanzare l'enumeratore superano gli elementi successivi nella raccolta.

Dopo aver passato la fine della raccolta, le chiamate per MoveNext restituire false.

Un enumeratore è valido finché la raccolta rimane invariata. Se le modifiche vengono apportate alla raccolta, ad esempio l'aggiunta, la modifica o l'eliminazione di elementi, l'enumeratore diventa non valido e la chiamata successiva per MoveNext generare un InvalidOperationExceptionoggetto .

Si applica a