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EduSpider.Services/ExamService.cs

@@ -672,8 +672,13 @@ namespace EduSpider.Services
                     int eNum = examList.Count();//考试数量
                     List<RB_Exam_Score_Extend> TRankList = new List<RB_Exam_Score_Extend>();//统计排名
                     foreach (var stuId in StuIdList) {
-                        decimal TScore = Math.Round(scoreList.Where(x => x.StuId == stuId).Sum(x => x.TScore) / eNum, 2, MidpointRounding.AwayFromZero);// 平均几次考试 得到总分
-                        decimal ExamScore = Math.Round(scoreList.Where(x => x.StuId == stuId).Sum(x => x.ExamScore) / eNum, 2, MidpointRounding.AwayFromZero);
+                        eNum = scoreList.Where(x => x.StuId == stuId).Select(x => x.ExamId).Distinct().Count();//学生参与考试的数量
+                        decimal TScore = 0, ExamScore = 0;
+                        if (eNum > 0)
+                        {
+                            TScore = Math.Floor(scoreList.Where(x => x.StuId == stuId).Sum(x => x.TScore) / eNum);// 平均几次考试 得到总分
+                            ExamScore = Math.Round(scoreList.Where(x => x.StuId == stuId).Sum(x => x.ExamScore) / eNum, 2, MidpointRounding.AwayFromZero);
+                        }
 
                         TRankList.Add(new RB_Exam_Score_Extend()
                         {