SocketPermission.Intersect メソッド

.NET Framework クラス ライブラリ リファレンス

SocketPermission.Intersect メソッド

2 つの SocketPermission インスタンス間の論理積集合を返します。

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

Visual Basic (宣言)

Public Overrides Function
 Intersect ( _
    target As IPermission _
) As IPermission

Visual Basic (使用法)

Dim instance As SocketPermission
Dim target As IPermission
Dim returnValue As IPermission

returnValue = instance.Intersect(target)

C#

public override IPermission Intersect (
    IPermission target
)

C++

public:
virtual IPermission^ Intersect (
    IPermission^ target
) override

J#

public IPermission Intersect (
    IPermission target
)

JScript

public override function Intersect (
    target : IPermission
) : IPermission

パラメータ

target

現在のインスタンスと積集合を持つ SocketPermission インスタンス。

戻り値
2 つの SocketPermission インスタンスの積集合を表す SocketPermission インスタンス。積集合が空の場合、このメソッドは null 参照 (Visual Basic では Nothing) を返します。target パラメータが null 参照の場合、このメソッドは null 参照 (Visual Basic では Nothing) を返します。

例外

例外の種類	条件
ArgumentException	target パラメータが SocketPermission ではありません。
SecurityException	DnsPermission が、メソッドの呼び出し側では付与されていません。

解説

2 つのアクセス許可の積集合となるアクセス許可とは、両方のアクセス許可によって保護されるリソースと処理を保護するアクセス許可です。つまり、両方のアクセス許可に適合する要求がそれぞれの積集合にも適合する、最小のアクセス許可を表します。このメソッドは、Intersect をオーバーライドし、IPermission インターフェイスをサポートするために実装されます。

使用例

Intersect メソッドを使用して、2 つの SocketPermission インスタンス間の論理積集合を取得する例を次に示します。

Visual Basic

Dim socketPermission1 As New
 SocketPermission(PermissionState.Unrestricted)

'Create a 'SocketPermission' object for two ip addresses.
Dim socketPermission2 As New
 SocketPermission(PermissionState.None)
Dim securityElement1 As SecurityElement = socketPermission2.ToXml()
''SocketPermission' object for 'Connect' permission
Dim securityElement2 As New
 SecurityElement("ConnectAccess")
'Format to specify ip address are <ip-address>#<port>#<transport-type>
'First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and for 'All'
' ports for the ip-address.
Dim securityElement3 As New
 SecurityElement("URI", "192.168.144.238#-1#3")
'Second 'SocketPermission' ip-address is '192.168.144.240' for 'All'
 transport types and for 'All' ports for the ip-address.
Dim securityElement4 As New
 SecurityElement("URI", "192.168.144.240#-1#3")
securityElement2.AddChild(securityElement3)
securityElement2.AddChild(securityElement4)
securityElement1.AddChild(securityElement2)


'Obtain a 'SocketPermission' object using 'FromXml' method.
socketPermission2.FromXml(securityElement1)

Console.WriteLine(ControlChars.Cr + "Displays the result of FromXml
 method : " + ControlChars.Cr)
Console.WriteLine(socketPermission2.ToString())

'Create another 'SocketPermission' object with two ip addresses.
'First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and for 'All' ports for the ip-address.
Dim socketPermission3 As New
 SocketPermission(NetworkAccess.Connect, TransportType.All, "192.168.144.238",
 SocketPermission.AllPorts)

'Second 'SocketPermission' ip-address is '192.168.144.239' for 'All'
 transport types and for 'All' ports for the ip-address.
socketPermission3.AddPermission(NetworkAccess.Connect, TransportType.All, "192.168.144.239",
 SocketPermission.AllPorts)

Console.WriteLine("Displays the result of AddPermission method
 : " + ControlChars.Cr)
Console.WriteLine(socketPermission3.ToString())

'Find the intersection between two 'SocketPermission' objects.
socketPermission1 = CType(socketPermission2.Intersect(socketPermission3), SocketPermission)

Console.WriteLine("Displays the result of Intersect method :"
 + ControlChars.Cr + " ")
Console.WriteLine(socketPermission1.ToString())
'Demand that the calling method have the requsite socket permission.
socketPermission1.Demand()

C#

  SocketPermission socketPermission1 = new SocketPermission(PermissionState.Unrestricted);

  // Create a 'SocketPermission' object for two ip addresses.
  SocketPermission socketPermission2 = new SocketPermission(PermissionState.None);
  SecurityElement securityElement1 = socketPermission2.ToXml();
  // 'SocketPermission' object for 'Connect' permission
  SecurityElement securityElement2 = new SecurityElement("ConnectAccess");
  // Format to specify ip address are <ip-address>#<port>#<transport-type>
  // First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and 
// for 'All'ports for the ip-address.
  SecurityElement securityElement3 = new SecurityElement("URI",
 "192.168.144.238#-1#3");
  // Second 'SocketPermission' ip-address is '192.168.144.240' for 'All'
 transport types and 
// for 'All' ports for the ip-address.
  SecurityElement securityElement4 = new SecurityElement("URI",
 "192.168.144.240#-1#3");
  securityElement2.AddChild(securityElement3);
  securityElement2.AddChild(securityElement4);
  securityElement1.AddChild(securityElement2);
  
 // Obtain a 'SocketPermission' object using 'FromXml' method.
  socketPermission2.FromXml(securityElement1);

  Console.WriteLine("\nDisplays the result of FromXml method : \n");
  Console.WriteLine(socketPermission2.ToString());

  // Create another 'SocketPermission' object with two ip addresses.
  // First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and for 'All' ports for the ip-address.
  SocketPermission socketPermission3 = 
                  new SocketPermission(NetworkAccess.Connect,
                                       TransportType.All,
                                       "192.168.144.238",
                                       SocketPermission.AllPorts);

 // Second 'SocketPermission' ip-address is '192.168.144.239' for 'All'
 transport types and for 'All' ports for the ip-address.
  socketPermission3.AddPermission(NetworkAccess.Connect,
                                 TransportType.All,
                                 "192.168.144.239",
                                 SocketPermission.AllPorts);

  Console.WriteLine("Displays the result of AddPermission method : \n");
  Console.WriteLine(socketPermission3.ToString());

 // Find the intersection between two 'SocketPermission' objects.
  socketPermission1 = (SocketPermission)socketPermission2.Intersect(socketPermission3);

  Console.WriteLine("Displays the result of Intersect method :\n ");
  Console.WriteLine(socketPermission1.ToString());

  // Demand that the calling method have the requsite socket permission.
  socketPermission1.Demand();

C++

SocketPermission^ socketPermission1 = gcnew SocketPermission( PermissionState::Unrestricted
 );

// Create a 'SocketPermission' Object* for two ip addresses.
SocketPermission^ socketPermission2 = gcnew SocketPermission( PermissionState::None
 );
SecurityElement^ securityElement1 = socketPermission2->ToXml();
// 'SocketPermission' Object* for 'Connect' permission
SecurityElement^ securityElement2 = gcnew SecurityElement( "ConnectAccess"
 );
// Format to specify ip address are <ip-address>#<port>#<transport-type>
// First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and
// for 'All'ports for the ip-address.
SecurityElement^ securityElement3 = gcnew SecurityElement( "URI","192.168.144.238#-1#3"
 );
// Second 'SocketPermission' ip-address is '192.168.144.240' for 'All'
 transport types and
// for 'All' ports for the ip-address.
SecurityElement^ securityElement4 = gcnew SecurityElement( "URI","192.168.144.240#-1#3"
 );
securityElement2->AddChild( securityElement3 );
securityElement2->AddChild( securityElement4 );
securityElement1->AddChild( securityElement2 );

// Obtain a 'SocketPermission' Object* using 'FromXml' method.
socketPermission2->FromXml( securityElement1 );

Console::WriteLine( "\nDisplays the result of FromXml method : \n" );
Console::WriteLine( socketPermission2 );

// Create another 'SocketPermission' Object* with two ip addresses.
// First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 transport types and for 'All' ports for the ip-address.
SocketPermission^ socketPermission3 =
   gcnew SocketPermission( NetworkAccess::Connect,
      TransportType::All,
      "192.168.144.238",
      SocketPermission::AllPorts );

// Second 'SocketPermission' ip-address is '192.168.144.239' for 'All'
 transport types and for 'All' ports for the ip-address.
socketPermission3->AddPermission( NetworkAccess::Connect,
   TransportType::All,
   "192.168.144.239",
   SocketPermission::AllPorts );

Console::WriteLine( "Displays the result of AddPermission method : \n"
 );
Console::WriteLine( socketPermission3 );

// Find the intersection between two 'SocketPermission' objects.
socketPermission1 = dynamic_cast<SocketPermission^>(socketPermission2->Intersect(
 socketPermission3 ));

Console::WriteLine( "Displays the result of Intersect method :\n " );
Console::WriteLine( socketPermission1 );

// Demand that the calling method have the requsite socket permission.
socketPermission1->Demand();

J#

SocketPermission socketPermission1 = 
    new SocketPermission(PermissionState.Unrestricted);

// Create a 'SocketPermission' object for two ip addresses.
SocketPermission socketPermission2 = 
    new SocketPermission(PermissionState.None);
SecurityElement securityElement1 = socketPermission2.ToXml();

// 'SocketPermission' object for 'Connect' permission
SecurityElement securityElement2 = new SecurityElement("ConnectAccess");

// Format to specify ip address are <ip-address>#<port>#<transport-type>
// First 'SocketPermission' ip-address is '192.168.144.238' for 'All'
 
// transport types and for 'All'ports for the ip-address.
SecurityElement securityElement3 = 
    new SecurityElement("URI", "192.168.144.238#-1#3");

// Second 'SocketPermission' ip-address is '192.168.144.240' for 
// 'All' transport types and for 'All' ports for the ip-address.
SecurityElement securityElement4 = 
    new SecurityElement("URI", "192.168.144.240#-1#3");

securityElement2.AddChild(securityElement3);
securityElement2.AddChild(securityElement4);
securityElement1.AddChild(securityElement2);

// Obtain a 'SocketPermission' object using 'FromXml' method.
socketPermission2.FromXml(securityElement1);
Console.WriteLine("\nDisplays the result of FromXml method : \n");
Console.WriteLine(socketPermission2.ToString());

// Create another 'SocketPermission' object with two ip addresses.
// First 'SocketPermission' ip-address is '192.168.144.238' for 
// 'All' transport types and for 'All' ports for the ip-address.
SocketPermission socketPermission3 = 
    new SocketPermission(NetworkAccess.Connect, TransportType.All,
 
    "192.168.144.238", SocketPermission.AllPorts);

// Second 'SocketPermission' ip-address is '192.168.144.239' for 
// 'All' transport types and for 'All' ports for the ip-address.
socketPermission3.AddPermission(NetworkAccess.Connect,
    TransportType.All, "192.168.144.239", SocketPermission.AllPorts);
Console.WriteLine("Displays the result of AddPermission method : \n");
Console.WriteLine(socketPermission3.ToString());

// Find the intersection between two 'SocketPermission' objects.
socketPermission1 = (SocketPermission) 
    socketPermission2.Intersect(socketPermission3);
Console.WriteLine("Displays the result of Intersect method :\n ");
Console.WriteLine(socketPermission1.ToString());

// Demand that the calling method have the requsite socket permission.
socketPermission1.Demand();

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、1.1、1.0

参照

関連項目
SocketPermission クラス
SocketPermission メンバ
System.Net 名前空間