Using an expression to modify the value of a property

• #CurrentValue: This variable contains the current value of the
  
  property. The type of the value depends on the type of the property to change.
• #Permission: A VGIPermission object containing the permission for which the security action
  
  is executed. You can access to the value of a permission argument by using the syntax:
  
  #Permission[‘myarg’].
• #EventArgs: This variable references the arguments passed to the
  
  event that raises the security action. This variable is available only when the
  
  security action is raised for a specific event. The type of this variable depends
  
  of the type of the event handler used to handles the event. For example,  when
  
  you create an action raised on the ‘Validating’ event of a textbox, the type of
  
  the  #EventArgs variable will be ‘CancelEventArgs’
  
  since the type of the event is ‘CancelEventHandler’.
• #UserId: A string value containing the Visual Guard repository
  
  Id of the user for which the action is executed.
• #UserName: A string value containing the name of the user
  
  for which the action is executed.
• #Principal: A VGIPrincipal object containing the principal for which the action is executed.
  
  You can use this variable to check whether the user is authenticated or not (#Principal.Identity.IsAuthenticated)
  
  or if the current user is member of a specific role (#Principal.IsInRole(‘administrator’)).

Evaluation of the expression

Error on expression at design time

Examples of expression

#CurrentValue and _txbCountry.Text == #Permission['Country']

#CurrentValue.Length == 0 ? string.Format('Country = ''{0}''',#Permission['Country']) : string.Format('({1}) And Country = ''{0}''',#Permission['Country'], #CurrentValue)