UIPermission.FromXml(SecurityElement) Método

Definición

Reconstruye un permiso con un estado especificado a partir de una codificación XML.Reconstructs a permission with a specified state from an XML encoding.

public:
 override void FromXml(System::Security::SecurityElement ^ esd);
public override void FromXml (System.Security.SecurityElement esd);
override this.FromXml : System.Security.SecurityElement -> unit
Public Overrides Sub FromXml (esd As SecurityElement)

Parámetros

esd
SecurityElement

Codificación XML que se usa para reconstruir el permiso.The XML encoding used to reconstruct the permission.

Excepciones

El parámetro esd es null.The esd parameter is null.

El parámetro esd no es un elemento de permiso válido.The esd parameter is not a valid permission element.

o bien-or- El número de la versión del parámetro esd no es válido.The esd parameter's version number is not valid.

Ejemplos

En el ejemplo de código siguiente se muestra el FromXml comportamiento del método.The following code example shows the behavior of the FromXml method. Este ejemplo forma parte de un ejemplo más extenso proporcionado para UIPermission la clase.This example is part of a larger example provided for the UIPermission class.

Nota

El ejemplo de código está diseñado para mostrar el comportamiento del método, no para demostrar su uso.The code example is intended to show the behavior of the method, not to demonstrate its use. En general, la infraestructura de seguridad utiliza los métodos de las clases de permiso; normalmente no se utilizan en las aplicaciones.In general, the methods of permission classes are used by the security infrastructure; they are not typically used in applications.


// ToXml creates an XML encoding of the permission and its current state; FromXml reconstructs a
// permission with the specified state from the XML encoding.
void ToFromXmlDemo()
{
    Console::WriteLine("\n**********************  To/From XML() Demo *********************\n");

    UIPermission ^ uiPerm1 = gcnew UIPermission(UIPermissionWindow::SafeTopLevelWindows);
    UIPermission ^ uiPerm2 = gcnew UIPermission(PermissionState::None);
    uiPerm2->FromXml(uiPerm1->ToXml());
    bool result = uiPerm2->Equals(uiPerm1);
    if (result)
        Console::WriteLine("Result of ToFromXml = " + uiPerm2->ToString());
    else
        {
        Console::WriteLine(uiPerm2->ToString());
        Console::WriteLine(uiPerm1->ToString());
        }
}
// ToXml creates an XML encoding of the permission and its current state; FromXml reconstructs a
// permission with the specified state from the XML encoding.
private static void ToFromXmlDemo()
{


    UIPermission uiPerm1 = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
    UIPermission uiPerm2 = new UIPermission(PermissionState.None);
    uiPerm2.FromXml(uiPerm1.ToXml());
    bool result = uiPerm2.Equals(uiPerm1);
    if (result)
    {
        Console.WriteLine("Result of ToFromXml = " + uiPerm2.ToString());
    }
    else
    {
        Console.WriteLine(uiPerm2.ToString());
        Console.WriteLine(uiPerm1.ToString());
    }

}
    ' ToXml creates an XML encoding of the permission and its current state; FromXml reconstructs a
    ' permission with the specified state from the XML encoding.
    Private Shared Sub ToFromXmlDemo()


        Dim uiPerm1 As New UIPermission(UIPermissionWindow.SafeTopLevelWindows)
        Dim uiPerm2 As New UIPermission(PermissionState.None)
        uiPerm2.FromXml(uiPerm1.ToXml())
        Dim result As Boolean = uiPerm2.Equals(uiPerm1)
        If result Then
            Console.WriteLine("Result of ToFromXml = " + uiPerm2.ToString())
        Else
            Console.WriteLine(uiPerm2.ToString())
            Console.WriteLine(uiPerm1.ToString())
        End If

    End Sub
End Class

Se aplica a