DnsPermission.Union メソッドとは? わかりやすく解説

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DnsPermission.Union メソッド

現在のアクセス許可インスタンス指定したアクセス許可インスタンス和集合を表すアクセス許可インスタンス作成します

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

Public Overrides Function
 Union ( _
    target As IPermission _
) As IPermission
Dim instance As DnsPermission
Dim target As IPermission
Dim returnValue As IPermission

returnValue = instance.Union(target)
public override IPermission Union (
    IPermission target
)
public:
virtual IPermission^ Union (
    IPermission^ target
) override
public IPermission Union (
    IPermission target
)
public override function Union (
    target : IPermission
) : IPermission

パラメータ

target

現在のインスタンス組み合わせる DnsPermission インスタンス

戻り値
現在の DnsPermission インスタンス指定した DnsPermission インスタンス和集合を表す DnsPermission インスタンスtargetnull 参照 (Visual Basic では Nothing) の場合、このメソッド現在のインスタンスコピー返します現在のインスタンスまたは target無制限である場合、このメソッド無制限DnsPermission インスタンス返しますそれ以外場合は、制限付きDnsPermission インスタンス返します

例外例外
例外種類条件

ArgumentException

targetDnsPermission でも null 参照 (Visual Basic では Nothing) でもありません。

解説解説
使用例使用例

現在のアクセス許可インスタンス指定したアクセス許可インスタンス和集合を表すアクセス許可インスタンス作成する例を次に示します

Private Sub MyUnion()
    ' Create a DnsPermission instance which is the union of the current
 DnsPermission instance and the specified DnsPermission instance.
    Dim permission As DnsPermission = CType(dnsPermission1.Union(dnsPermission2),
 DnsPermission)
    ' Print the attributes and values of the union instance of DnsPermission.
    PrintKeysAndValues(permission.ToXml().Attributes)
End Sub 'MyUnion
Public Sub useDns()
    ' Create a DnsPermission instance.
    dnsPermission1 = New DnsPermission(PermissionState.Unrestricted)
    dnsPermission2 = New DnsPermission(PermissionState.None)
    ' Check for permission.
    dnsPermission1.Demand()
    dnsPermission2.Demand()
    Console.WriteLine("Attributes and Values of first DnsPermission
 instance :")
    PrintKeysAndValues(dnsPermission1.ToXml().Attributes)
    Console.WriteLine("Attributes and Values of second DnsPermission
 instance :")
    PrintKeysAndValues(dnsPermission2.ToXml().Attributes)
    Console.WriteLine("Union of both instances : ")
    MyUnion()
    Console.WriteLine("Intersection of both instances : ")
    MyIntersection()
End Sub 'useDns

Private Sub PrintKeysAndValues(myList As
 Hashtable)
    ' Get the enumerator that can iterate through the hash table.
    Dim myEnumerator As IDictionaryEnumerator
 = myList.GetEnumerator()
    Console.WriteLine(ControlChars.Tab + "-KEY-" +
 ControlChars.Tab + "-VALUE-")
    While myEnumerator.MoveNext()
        Console.WriteLine(ControlChars.Tab + "{0}:"
 + ControlChars.Tab + "{1}", myEnumerator.Key, myEnumerator.Value)
    End While
    Console.WriteLine()
End Sub 'PrintKeysAndValues
private void MyUnion()
{
   // Create a DnsPermission instance that is the union of the current
 DnsPermission
   // instance and the specified DnsPermission instance.     
   DnsPermission permission = (DnsPermission)dnsPermission1.Union(dnsPermission2);
   // Print the attributes and the values of the union instance of DnsPermission.
   PrintKeysAndValues(permission.ToXml().Attributes);
}
public void useDns() {
   // Create a DnsPermission instance.
   dnsPermission1 = new DnsPermission(PermissionState.Unrestricted);
   dnsPermission2 = new DnsPermission(PermissionState.None);
   // Check for permission.
   dnsPermission1.Demand();
   dnsPermission2.Demand();
   Console.WriteLine("Attributes and Values of first DnsPermission instance
 :");
   PrintKeysAndValues(dnsPermission1.ToXml().Attributes);
   Console.WriteLine("Attributes and Values of second DnsPermission instance
 :");
   PrintKeysAndValues(dnsPermission2.ToXml().Attributes);
   Console.WriteLine("Union of both instances : ");
   MyUnion();
   Console.WriteLine("Intersection of both instances : ");
   MyIntersection();
}

private void PrintKeysAndValues(Hashtable myList)
 {
   // Get the enumerator that can iterate through the hash tabble.
   IDictionaryEnumerator myEnumerator = myList.GetEnumerator();
   Console.WriteLine("\t-KEY-\t-VALUE-");
   while (myEnumerator.MoveNext())
      Console.WriteLine("\t{0}:\t{1}", myEnumerator.Key, myEnumerator.Value);
   Console.WriteLine();
}
private:
   void MyUnion()
   {
      // Create a DnsPermission instance that is the union of the current
 DnsPermission
      // instance and the specified DnsPermission instance.
      DnsPermission^ permission = dynamic_cast<DnsPermission^>(dnsPermission1->Union(
 dnsPermission2 ));
      // Print the attributes and the values of the union instance of
 DnsPermission.
      PrintKeysAndValues( permission->ToXml()->Attributes );
   }

public:
   void useDns()
   {
      // Create a DnsPermission instance.
      dnsPermission1 = gcnew DnsPermission( PermissionState::Unrestricted );
      dnsPermission2 = gcnew DnsPermission( PermissionState::None );
      // Check for permission.
      dnsPermission1->Demand();
      dnsPermission2->Demand();
      Console::WriteLine( "Attributes and Values of first DnsPermission instance
 :" );
      PrintKeysAndValues( dnsPermission1->ToXml()->Attributes );
      Console::WriteLine( "Attributes and Values of second DnsPermission instance
 :" );
      PrintKeysAndValues( dnsPermission2->ToXml()->Attributes );
      Console::WriteLine( "Union of both instances : " );
      MyUnion();
      Console::WriteLine( "Intersection of both instances : " );
      MyIntersection();
   }

private:
   void PrintKeysAndValues( Hashtable^ myList )
   {
      // Get the enumerator that can iterate through the hash tabble.
      IDictionaryEnumerator^ myEnumerator = myList->GetEnumerator();
      Console::WriteLine( "\t-KEY-\t-VALUE-" );
      while ( myEnumerator->MoveNext() )
      {
         Console::WriteLine( "\t {0}:\t {1}", myEnumerator->Key, myEnumerator->Value
 );
      }
      Console::WriteLine();
   }
private void MyUnion()
{
    // Create a DnsPermission instance that is the union of the 
    // current DnsPermission
    // instance and the specified DnsPermission instance.     
    DnsPermission permission = (DnsPermission)dnsPermission1.
        Union(dnsPermission2);

    // Print the attributes and the values of the union 
    // instance of DnsPermission.
    PrintKeysAndValues(permission.ToXml().get_Attributes());
} //MyUnion

public void UseDns()
{
    // Create a DnsPermission instance.
    dnsPermission1 = new DnsPermission(PermissionState.Unrestricted);
    dnsPermission2 = new DnsPermission(PermissionState.None);

    // Check for permission.
    dnsPermission1.Demand();
    dnsPermission2.Demand();
    Console.WriteLine("Attributes and Values of first DnsPermission "
        + "instance :");
    PrintKeysAndValues(dnsPermission1.ToXml().get_Attributes());
    Console.WriteLine("Attributes and Values of second DnsPermission "
        + "instance :");
    PrintKeysAndValues(dnsPermission2.ToXml().get_Attributes());
    Console.WriteLine("Union of both instances : ");
    MyUnion();
    Console.WriteLine("Intersection of both instances : ");
    MyIntersection();
} //UseDns

private void PrintKeysAndValues(Hashtable myList)
{
    // Get the enumerator that can iterate through the hash tabble.
    IDictionaryEnumerator myEnumerator = myList.GetEnumerator();
    Console.WriteLine("\t-KEY-\t-VALUE-");
    while (myEnumerator.MoveNext()) {
        Console.WriteLine("\t{0}:\t{1}", myEnumerator.get_Key(),
            myEnumerator.get_Value());
    }
    Console.WriteLine();
} //PrintKeysAndValues
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