数据格式如下：


导入方法方法
原格式数据存在dataList

string strLast = string.Empty;      //最后型号
            StringBuilder sbFlow = new StringBuilder(); //流量
            StringBuilder sbLift = new StringBuilder();//扬程
            StringBuilder sbPower = new StringBuilder();//功率
            StringBuilder sbEffict = new StringBuilder();//效率
            
            foreach (objData a in dataList)
            {
                ///新型号
                if (!string.IsNullOrWhiteSpace(a.ProductName))
                {
                    //计算公式
                    if (sbFlow.Length > 0)
                    {
                        //objFormula item = GetFormula(sbFlow.ToString(), sbLift.ToString(), sbPower.ToString(), sbEffict.ToString(),
                        //       strLast,i);

                        double[] flowArry = Array.ConvertAll<string, double>(sbFlow.ToString().Split(','), s => double.Parse(s));
                        double[] liftArry = Array.ConvertAll<string, double>(sbLift.ToString().Split(','), s => double.Parse(s));
                        double[] powerArry = Array.ConvertAll<string, double>(sbPower.ToString().Split(','), s => double.Parse(s));
                        double[] effictArry = Array.ConvertAll<string, double>(sbEffict.ToString().Split(','), s => double.Parse(s));

                        objFormula item = new objFormula();
                        item.Product = strLast;
                        double[] qhArry = Common.MultiLine(flowArry, liftArry, flowArry.Length, int.Parse(this.tboxNumber.Text));
                        item.QH = string.Join(",", qhArry);
                        double[] qpArry = Common.MultiLine(flowArry, powerArry, flowArry.Length, int.Parse(this.tboxNumber.Text));
                        item.QP = string.Join(",", qpArry);
                        double[] qnArry = Common.MultiLine(flowArry, effictArry, flowArry.Length, int.Parse(this.tboxNumber.Text));
                        item.QN = string.Join(",", qnArry);
                        retList.Add(item);

                        //清空
                        sbFlow.Clear();
                        sbLift.Clear();
                        sbPower.Clear();
                        sbEffict.Clear();
                    }
                    //新型号
                    strLast = a.ProductName;
                    sbFlow.Append(a.flow);
                    sbLift.Append(a.lift);
                    sbPower.Append(a.power);
                    sbEffict.Append(a.effict);
                }
                else
                {
                    sbFlow.Append("," + a.flow);
                    sbLift.Append("," + a.lift);
                    sbPower.Append("," + a.power);
                    sbEffict.Append("," + a.effict);
                }
            }


三个stringbuild值居然一致？？？？