wifi盟主奖励和运营中心奖励取值逻辑修改，取最新的交易

AppStart/Helper/LeaderPrizeService.cs

@@ -56,10 +56,10 @@ namespace MySystem
                                 }
                                 if(pos.BrandId == 23 || pos.BrandId == 24 || pos.BrandId == 25 || pos.BrandId == 26)
                                 {
-                                    PxcModels.WifiTradeRecord trade = db.WifiTradeRecord.FirstOrDefault(m => m.SnNo == pos.PosSn);
-                                    if (trade != null)
+                                    int tradeCount = db.WifiTradeRecord.Count(m => m.SnNo == pos.PosSn);
+                                    if (tradeCount > 0)
                                     {
-                                        ChangeAmount = trade.TradeAmount * 0.015M;
+                                        ChangeAmount = db.WifiTradeRecord.Where(m => m.SnNo == pos.PosSn).OrderByDescending(m => m.Id).TradeAmount * 0.015M;
                                         ChangeAmount = PublicFunction.NumberFormat(ChangeAmount);
                                     }
                                     else

AppStart/Helper/OperatePrizeService.cs

@@ -75,10 +75,10 @@ namespace MySystem
                                     }
                                     if(pos.BrandId == 23 || pos.BrandId == 24 || pos.BrandId == 25 || pos.BrandId == 26)
                                     {
-                                        PxcModels.WifiTradeRecord trade = db.WifiTradeRecord.FirstOrDefault(m => m.SnNo == pos.PosSn);
-                                        if (trade != null)
+                                        int tradeCount = db.WifiTradeRecord.Count(m => m.SnNo == pos.PosSn);
+                                        if (tradeCount > 0)
                                         {
-                                            ChangeAmount = trade.TradeAmount * 0.005M;
+                                            ChangeAmount = db.WifiTradeRecord.Where(m => m.SnNo == pos.PosSn).OrderByDescending(m => m.Id).TradeAmount * 0.005M;
                                             ChangeAmount = PublicFunction.NumberFormat(ChangeAmount);
                                         }
                                         else