Dev2.Data.WarewolfIterator.GetNextValue C# (CSharp) Method

        public string GetNextValue()
        {
            _currentValue++;
            if (_listResult != null)
            {
                var warewolfAtomToString = ExecutionEnvironment.WarewolfAtomToStringErrorIfNull(_listResult.Item.GetNextValue());
                warewolfAtomToString = DoCalcution(warewolfAtomToString);
                return warewolfAtomToString;
            }
            return _scalarResult != null ? DoCalcution(ExecutionEnvironment.WarewolfAtomToStringErrorIfNull(_scalarResult.Item)) : null;
        }

 IEnumerable<string> BuildQueryFromTo(SharepointSearchTo sharepointSearchTo, IExecutionEnvironment env, ISharepointFieldTo sharepointFieldTo,int update)
 {
     WarewolfIterator iterator = new WarewolfIterator(env.Eval(sharepointSearchTo.ValueToMatch,update));
     while (iterator.HasMoreData())
     {
         var fieldType = sharepointFieldTo.GetFieldType();
         yield return string.Format("{0}<FieldRef Name=\"{1}\"></FieldRef><Value Type=\"{2}\">{3}</Value>{4}", SharepointSearchOptions.GetStartTagForSearchOption(sharepointSearchTo.SearchType), sharepointSearchTo.InternalName, fieldType, CastWarewolfValueToCorrectType(iterator.GetNextValue(), sharepointFieldTo.Type), SharepointSearchOptions.GetEndTagForSearchOption(sharepointSearchTo.SearchType));
     }
 }