确认书到期日取最早的那笔交易到期日

Plugins/YLErp.Plugins.ZheShang/DocumentGenerator/TradeConfirmationGenerator.cs

@@ -121,6 +121,7 @@ namespace YLErp.Plugins.ShanXi.DocumentGenerator
             // 计算初始预付金率和维持预付金率(加权)
             decimal initialMarginRate = 0;
             decimal maintainMarginRate = 0;
+            var exerciseDate= trades.Select(x => x.ExerciseDate).OrderBy(o=>o).FirstOrDefault();
             foreach (var trade in trades)
             {
                 var swapPositions = Context.GetSwapPositions(trade.id, true);
@@ -147,7 +148,7 @@ namespace YLErp.Plugins.ShanXi.DocumentGenerator
 
                     dic["成交日期"] = trade.TradeDate?.ToString("yyyy年M月d日");
                     dic["开始日期"] = trade.StartDate?.ToString("yyyy年M月d日");
-                    dic["到期日期"] = trade.ExerciseDate?.ToString("yyyy年M月d日");
+                    dic["到期日期"] = exerciseDate?.ToString("yyyy年M月d日");
                     bool posiLong = swapPosition?.PositionType == (int)PositionTypeFlag.Short ? false : true;
                     var interestRate = interestMargin?.InterestRateDefault * 100 ?? 0;                    
                     dic["多头约定利率"] = "不适用";