Disco.Services.DocumentTemplateExpressionExtensions.EvaluateOnGenerateExpression C# (CSharp) Method

        public static string EvaluateOnGenerateExpression(this DocumentTemplate dt, object Data, DiscoDataContext Database, User User, DateTime TimeStamp, DocumentState State)
        {
            if (!string.IsNullOrEmpty(dt.OnGenerateExpression))
            {
                var compiledExpression = dt.OnGenerateExpressionFromCache();
                var evaluatorVariables = Expression.StandardVariables(dt, Database, User, TimeStamp, State);

                var result = compiledExpression.EvaluateFirst<object>(Data, evaluatorVariables);
                return result.ToString();
            }
            return null;
        }
    }