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SocketPermission Constructor (PermissionState)

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

Namespace:  System.Net
Assembly:  System (in System.dll)

'Declaration
Public Sub New ( _
	state As PermissionState _
)

Parameters

state
Type: System.Security.Permissions.PermissionState

One of the PermissionState values.

If the SocketPermission instance is created with the Unrestricted value from PermissionState then the SocketPermission instance passes all demands. Any other value for state results in a SocketPermission instance that fails all demands unless a transport address permission is added with AddPermission.

The following example creates a SocketPermission using a PermissionState enumerated value.

' <Snippet6>         

        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()
' </Snippet3>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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