题库模板导入对应课程按照一笔题目对一笔课程导入，相同试题（题目类型、难易程度、题目内容一致才定义为相同）对应不同课程时成功导入后要在同一个单元格中合并显示

Tiobon.Core.Services/Ghre/Ghre_QuestionServices.cs

@@ -879,6 +879,7 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
             var x = types[jj];
 
             string questionType = ConvertQuestionType1(x);
+            string difficultyLevel = string.Empty;
             try
             {
                 var dt = NPOIHelper.ImportExcel(filepath, x);
@@ -913,6 +914,7 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
                     if (string.IsNullOrEmpty(questionContent))
                         comments.Add("题目内容为必填项！");
 
+
                     if (courseName.IsNullOrEmpty())
                         comments.Add("课程为必填项！");
                     else
@@ -936,7 +938,6 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
                         correctAnswer = dt.Rows[i]["正确答案"].ToString();
                     if (string.IsNullOrWhiteSpace(correctAnswer) && questionType != "Completion" && questionType != "ShortAnswer")
                         comments.Add("正确答案未标记！");
-                    var difficultyLevel = dt.Rows[i]["难度"].ToString() ?? "普通";
                     var questionAnalysis = dt.Rows[i]["解析"].ToString();
                     if (string.IsNullOrWhiteSpace(difficultyLevel))
                         comments.Add("难易程度必填！");
@@ -971,19 +972,24 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
                         correctAnswer = dt.Rows[i]["正确答案"].ToString();
 
                     var questionAnalysis = dt.Rows[i]["解析"].ToString();
-                    var difficultyLevel = dt.Rows[i]["难度"].ToString() ?? "普通";
+                    difficultyLevel = dt.Rows[i]["难度"].ToString() ?? "普通";
+
+                    difficultyLevel = ConvertDifficultyLevel1(difficultyLevel);
 
                     Ghre_CourseDto course = await _ghre_CourseServices.QuerySingleDto(x => x.CourseName == courseName);
 
-                    var question = await base.Query(x => x.QuestionContent == questionContent && x.QuestionType == questionType && x.CourseId == course.Id);
+                    var question = await base.Query(x =>
+                    x.QuestionContent == questionContent &&
+                    x.DifficultyLevel == difficultyLevel &&
+                    x.QuestionType == questionType);
                     if (!question.Any())
                     {
-
                         var insert = new InsertGhre_QuestionInput()
                         {
                             CourseId = course?.Id,
+                            CourseIds = "[" + course?.Id + "]",
                             QuestionNo = await GenerateContinuousSequence(questionType.Substring(0, 1)),
-                            DifficultyLevel = ConvertDifficultyLevel1(difficultyLevel),
+                            DifficultyLevel = difficultyLevel,
                             QuestionType = questionType,
                             QuestionContent = questionContent,
                             QuestionAnalysis = questionAnalysis
@@ -1126,12 +1132,30 @@ public class Ghre_QuestionServices : BaseServices<Ghre_Question, Ghre_QuestionDt
                         }
                     }
                     else
+                    {
+
+                        if (question.Where(x => x.CourseIds != null && x.CourseIds.Contains(course.Id.ObjToString())).Any())
                         {
                             dt.Rows[i]["Comments"] = "试题在系统中已存在！";
                             data.ErrorCount++;
                             isExistError = true;
                             continue;
                         }
+                        else
+                        {
+                            var coursIds = question.FirstOrDefault()?.CourseIds;
+                            var coursIds1 = new List<long>();
+                            if (coursIds.IsNotEmptyOrNull())
+                                coursIds1 = JsonHelper.JsonToObj<List<long>>(coursIds);
+                            coursIds1.Add(course.Id);
+
+
+                            var question1 = question.FirstOrDefault();
+                            question1.CourseIds = JsonHelper.ObjToJson(coursIds1);
+                            await base.Update(question1, ["CourseIds"]);
+                        }
+
+                    }
                 }
 
                 if (isExistError)