CodeAccessPermission.FromXml(SecurityElement) Metoda

public:
 abstract void FromXml(System::Security::SecurityElement ^ elem);

public abstract void FromXml (System.Security.SecurityElement elem);

abstract member FromXml : System.Security.SecurityElement -> unit

Public MustOverride Sub FromXml (elem As SecurityElement)

Parametry

Implementuje

Výjimky

Příklady

Následující příklad kódu ukazuje přepsání FromXml metody. Tento příklad kódu je součástí většího příkladu CodeAccessPermission pro třídu.

public:
   virtual void FromXml( SecurityElement^ e ) override
   {
      // The following code for unrestricted permission is only included as an example for
      // permissions that allow the unrestricted state. It is of no value for this permission.
      String^ elUnrestricted = e->Attribute("Unrestricted");
      if ( nullptr != elUnrestricted )
      {
         m_Unrestricted = Boolean::Parse( elUnrestricted );
         return;
      }

      String^ elName = e->Attribute("Name");
      m_Name = elName == nullptr ? nullptr : elName;
   }

public override void FromXml(SecurityElement e)
 {
     // The following code for unrestricted permission is only included as an example for
     // permissions that allow the unrestricted state. It is of no value for this permission.
     String elUnrestricted = e.Attribute("Unrestricted");
     if (null != elUnrestricted)
     {
         m_Unrestricted = bool.Parse(elUnrestricted);
         return;
     }

     String elName = e.Attribute( "Name" );
     m_Name = elName == null ? null : elName;
 }

Public Overrides Sub FromXml(ByVal e As SecurityElement)
    ' The following code for unrestricted permission is only included as an example for
    ' permissions that allow the unrestricted state. It is of no value for this permission.
    Dim elUnrestricted As String = e.Attribute("Unrestricted")
    If Nothing <> elUnrestricted Then
        m_Unrestricted = Boolean.Parse(elUnrestricted)
        Return
    End If

    Dim elName As String = e.Attribute("Name")
    m_name = IIf(elName Is Nothing, Nothing, elName)
End Sub

Poznámky

Vlastní kód, který rozšiřuje objekty zabezpečení, musí implementovat ToXml metody a FromXml , aby se objekty security-encodable.

Poznámky pro implementátory

Tuto metodu je nutné přepsat v odvozené třídě.

Platí pro