DataTable转换为string

我的代码

我的代码

       sqlCheck.Append($@"

select M.FNUMBER,'[',S.FNAME,']','超出可用',isnull(qOnLock.qtyLock,0)+isnull(qOut.qtyDocOut,0)-isnull(qDocLock.qty,0)-isnull(qOnhand.qty,0),
'。库',isnull(qOnhand.qty,0) ,'锁',isnull(qOnLock.qtyLock,0),'.
'--换行用.\r\n没用，char(13)带有xml属性 无法处理
 from #itemSum qOut 
	left join M on qOut.msterID = M.FMATERIALID
	left join S on qOut.StockID = S.FSTOCKID and S.FLOCALEID='2052'
    left join qOnhand on qOut.msterID=qOnhand.FMATERIALID and qOut.StockID=qOnhand.FSTOCKID
    left join qOnLock on qOut.msterID=qOnLock.MaterialFId and qOut.StockID = qOnLock.NowSupplyWarehid
    left join #itemGpLock qDocLock on qOut.msterID=qDocLock.msterID and qOut.StockID = qDocLock.StockID
where isnull(qOnhand.qty,0)-isnull(qOnLock.qtyLock,0)-isnull(qOut.qtyDocOut,0)+isnull(qDocLock.qty,0) < 0
--FOR XML PATH('')

            --	select * from V_DWK_InventoryLock4MS
                                         -- if (@outStr<>'')
            		                           -- select @outStr
            	                            --else
            		                           -- select 
drop table #item
drop table #itemSum
drop table #itemGpLock
                          ");
            DataSet dsT = DBUtils.ExecuteDataSet(this.Context, sqlCheck.ToString());

               
            System.IO.StringWriter sw = new System.IO.StringWriter();
            System.Xml.XmlTextWriter xw = new System.Xml.XmlTextWriter(sw);
            dsT.WriteXml(xw);
            string s = sw.ToString();

            
            //表达式
            String matchpattern = @"<([^>]*)>(.*?)<\/\1>";
            //String matchpattern = @"<(\w+)([^>]*)>(.*?)<\/\1>"; 
            //$2=(.*?) 进行替换
            String replacementpattern = @"$2";
            //循环判断 是否还有正确的XML标签
            string s2 = s;
            while (Regex.IsMatch(s2, matchpattern))
            {
            s2 = Regex.Replace(s2, matchpattern, replacementpattern, RegexOptions.Singleline);
            }
            if (s2 != s)
            s = s2;
            //s = s.Replace("\\r\\n", "\\R\\N");
            if (s != "")

                e.CancelOperation = true;
                throw new KDBusinessException("校验不通过", s + "，操作失败！");
            }