DataProtectionPermission.FromXml(SecurityElement) Method

Definition

Namespace:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

Source:

DataProtectionPermission.cs

Reconstructs a permission with a specific state from an XML encoding.

public:
 override void FromXml(System::Security::SecurityElement ^ securityElement);

public override void FromXml (System.Security.SecurityElement securityElement);

override this.FromXml : System.Security.SecurityElement -> unit

Public Overrides Sub FromXml (securityElement As SecurityElement)

Parameters

securityElement

SecurityElement

A SecurityElement that contains the XML encoding used to reconstruct the permission.

Exceptions

ArgumentNullException

securityElement is null.

ArgumentException

securityElement is not a valid permission element.

-or-

The version number of securityElement is not supported.

Examples

The following code example shows the use of the FromXml method. This code example is part of a larger example provided for the DataProtectionPermission class.

Note

The code example is intended to show the behavior of the method, not to demonstrate its use. In general, the methods of permission classes are used by the security infrastructure; they are not typically used in applications.

Console::WriteLine( "Using an XML round trip to reset the fourth "
"permission." );
sp4->FromXml( sp2->ToXml() );
rc = sp4->Equals( sp2 );
Console::WriteLine( "Does the XML round trip result equal the "
"original permission? {0}", (rc ? (String^)"Yes" : "No") );

Console.WriteLine("Using an XML round trip to reset the fourth " +
    "permission.");
sp4.FromXml(sp2.ToXml());
rc = sp4.Equals(sp2);
Console.WriteLine("Does the XML round trip result equal the " +
    "original permission? " + (rc ? "Yes" : "No"));

    Console.WriteLine("Using an XML round trip to reset the fourth " + "permission.")
    sp4.FromXml(sp2.ToXml())
    rc = sp4.Equals(sp2)
    Console.WriteLine("Does the XML round trip result equal the " + "original permission? " + IIf(rc, "Yes", "No")) 'TODO: For performance reasons this should be changed to nested IF statements

End Sub

Remarks

The FromXml method reconstructs a DataProtectionPermission object from an XML encoding defined by the SecurityElement class. Use the ToXml method to XML-encode the DataProtectionPermission, including state information.