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SocketPermission Constructor (PermissionState)

.NET Framework 1.1

Initializes a new instance of the SocketPermission class that allows unrestricted access to the Socket or disallows access to the Socket.

[Visual Basic]
Public Sub New( _
   ByVal state As PermissionState _
)
[C#]
public SocketPermission(
   PermissionState state
);
[C++]
public: SocketPermission(
   PermissionState state
);
[JScript]
public function SocketPermission(
   state : PermissionState
);

Parameters

state
One of the PermissionState values.

Remarks

If the SocketPermission instance was created with the Unrestricted value from PermissionState then the SocketPermission instance will pass all demands. Any other value for state will result in a SocketPermission instance that will fail all demands unless a transport address permission is added with AddPermission.

Example

[Visual Basic, C#, C++] The following example creates a SocketPermission using a PermissionState enumerated value.

[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 = 
   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();

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Common Language Infrastructure (CLI) Standard

See Also

SocketPermission Class | SocketPermission Members | System.Net Namespace | SocketPermission Constructor Overload List

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