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SocketPermission::FromXml Method

Reconstructs a SocketPermission instance for an XML encoding.

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

public:
virtual void FromXml(
	SecurityElement^ securityElement
) override

Parameters

securityElement
Type: System.Security::SecurityElement

The XML encoding used to reconstruct the SocketPermission instance.

Implements

ISecurityEncodable::FromXml(SecurityElement)

ExceptionCondition
ArgumentNullException

The securityElement is nullptr.

ArgumentException

The securityElement is not a permission element for this type.

The FromXml method reconstructs a SocketPermission instance from an XML encoding defined by the SecurityElement class.

Use the ToXml method to encode the SocketPermission instance, including state information, in XML.

The following example uses the FromXml method to convert XML encoded data to a SocketPermission instance.

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();
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();

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

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