/// <summary>
/// Private ctor.
/// </summary>
private EvaluatorService(IExpressionEvaluatorService evaluator)
{
if (evaluator == null)
{
throw new ArgumentNullException("evaluator");
}
_evaluator = evaluator;
}
/// <summary>
/// Returns a reference to <see cref="IExpressionEvaluatorService"/> or null if it is not available (e.g. designer/component not yet initialized / sited?).
/// </summary>
private static IExpressionEvaluatorService GetEvaluatorService(IComponent component)
{
IExpressionEvaluatorService evaluatorService = null;
if (component != null && component.Site != null)
{
evaluatorService = component.Site.GetService(typeof(IExpressionEvaluatorService)) as IExpressionEvaluatorService;
}
Debug.Assert(evaluatorService != null, typeof(IExpressionEvaluatorService).Name + " is unavailable.");
return(evaluatorService);
}
