SocketPermission.Intersect メソッド

2008-03-28

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

Overrides Public Function Intersect( _
   ByVal target As IPermission _) As IPermission Implements IPermission.Intersect
[C#]
public override IPermission Intersect(IPermissiontarget);
[C++]
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 (Nothing) を返します。

実装

IPermission.Intersect

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

[Visual Basic, C#, C++] 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。

 

        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 = 
   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(S"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(S"URI", S"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(S"URI", S"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(S"\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 = 
   new SocketPermission(NetworkAccess::Connect,
   TransportType::All,
   S"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,
   S"192.168.144.239",
   SocketPermission::AllPorts);

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

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

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必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

SocketPermission クラス | SocketPermission メンバ | System.Net 名前空間

次の方法で共有

SocketPermission.Intersect メソッド

パラメータ

戻り値

実装

例外

解説

使用例

必要条件

参照

その他のリソース