private string EvaluateFormula(string formula, BaseClasses.Data.BaseRecord dataSourceForEvaluate, string format, System.Collections.Generic.IDictionary<string,object> variables, bool includeDS)
 {
     return EvaluateFormula_Base(formula, dataSourceForEvaluate, format, variables, includeDS);
 }

        public string EvaluateFormula_Base(string formula, BaseClasses.Data.BaseRecord dataSourceForEvaluate, string format, System.Collections.Generic.IDictionary<string, object> variables, bool includeDS)
        {
            FormulaEvaluator e = new FormulaEvaluator();

            // add variables for formula evaluation
            if (variables != null)
            {
                System.Collections.Generic.IEnumerator<System.Collections.Generic.KeyValuePair<string, object>> enumerator = variables.GetEnumerator();
                while (enumerator.MoveNext())
                {
                    e.Variables.Add(enumerator.Current.Key, enumerator.Current.Value);
                }
            }

            if (includeDS)
            {

            }

            e.CallingControl = this;

            // All variables referred to in the formula are expected to be
            // properties of the DataSource.  For example, referring to
            // UnitPrice as a variable will refer to DataSource.UnitPrice
            e.DataSource = dataSourceForEvaluate;

            // Define the calling control.
            e.CallingControl = this;

            object resultObj = e.Evaluate(formula);
            if (resultObj == null)
                return "";

            if ( !string.IsNullOrEmpty(format) && (string.IsNullOrEmpty(formula) || formula.IndexOf("Format(") < 0) )
            {
                return FormulaUtils.Format(resultObj, format);
            }
            else
            {
                return resultObj.ToString();
            }
        }

 public virtual string EvaluateFormula(string formula, BaseClasses.Data.BaseRecord dataSourceForEvaluate)
 {
     return this.EvaluateFormula(formula, dataSourceForEvaluate, null, null, true, null);
 }

        /// <summary>
        /// Evaluates the formula
        /// </summary>
        public static string EvaluateFormula(string formula, BaseClasses.Data.BaseRecord dataSourceForEvaluate, string format, string name)
        {
            BaseFormulaEvaluator e = new BaseFormulaEvaluator();
            if(dataSourceForEvaluate != null)
                e.Evaluator.Variables.Add(name, dataSourceForEvaluate);
            e.DataSource = dataSourceForEvaluate;
            object resultObj = e.Evaluate(formula);

            if (resultObj == null)
                return "";
            if (!string.IsNullOrEmpty(format))
                return BaseFormulaUtils.Format(resultObj, format);
            else
            return resultObj.ToString();
        }