diff --git a/Tiobon.Core.Services/Ghre/Ghre_OpenClassServices.cs b/Tiobon.Core.Services/Ghre/Ghre_OpenClassServices.cs
index 670b244e..6daab44a 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_OpenClassServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_OpenClassServices.cs
@@ -269,6 +269,7 @@ public class Ghre_OpenClassServices : BaseServices<Ghre_OpenClass, Ghre_OpenClas
     public async Task<ServiceResult> InsertStaff(long Id, List<int> staffIds)
     {
         var entity = await base.QueryById(Id);
+
         var stafffIds = new List<int>();
         if (entity.StaffGroupId.IsNotEmptyOrNull())
         {
diff --git a/Tiobon.Core.Services/Ghre/Ghre_StaffGroupServices.cs b/Tiobon.Core.Services/Ghre/Ghre_StaffGroupServices.cs
index 7b548cdc..3def7e77 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_StaffGroupServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_StaffGroupServices.cs
@@ -172,7 +172,7 @@ public class Ghre_StaffGroupServices : BaseServices<Ghre_StaffGroup, Ghre_StaffG
             x.ZoneId = null;
             x.ExclZoneId = null;
             x.DeptId = null;
-            x.ExclDeptId = null; 
+            x.ExclDeptId = null;
             x.TitleId = null;
             x.ExclTitleId = null;
             x.GradeId = null;
@@ -384,6 +384,9 @@ public class Ghre_StaffGroupServices : BaseServices<Ghre_StaffGroup, Ghre_StaffG
     {
         var x = await base.QueryById(id);
 
+        if (x is null)
+            return new ServicePageResult<Ghra_StaffDto>(filter.pageNum, 0, filter.pageSize, new List<Ghra_StaffDto>());
+
         x.StaffType1s = JsonHelper.JsonToObj<List<int?>>(x.StaffType1);
         x.StaffType2s = JsonHelper.JsonToObj<List<int?>>(x.StaffType2);
         x.ZoneIds = JsonHelper.JsonToObj<List<int>>(x.ZoneId);
diff --git a/Tiobon.Core.Services/Ghre/Ghre_StudyRecordServices.cs b/Tiobon.Core.Services/Ghre/Ghre_StudyRecordServices.cs
index e511ea9f..27c1b582 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_StudyRecordServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_StudyRecordServices.cs
@@ -1270,7 +1270,6 @@ WHERE A.Status !='Temporary' AND   (   EXISTS
         entitys.ForEach(x =>
         {
 
-            x.ShowStudyBtn = false;
             x.ShowExamBtn = false;
             x.ShowRegisterBtn = false;
 
@@ -1301,6 +1300,13 @@ WHERE A.Status !='Temporary' AND   (   EXISTS
             if (x.IsRequireStudy == false)
                 x.ShowStudyBtn = false;
 
+
+
+            if (dt >= x.CourseBeginDate && dt <= x.CourseEndDate)
+                x.DisableStudyBtn = false;
+            else
+                x.DisableStudyBtn = true;
+
             if (!x.ExamId.IsNull())
             {
                 if (x.ExamBeginDate != null && x.ExamEndDate != null)
@@ -1364,7 +1370,6 @@ WHERE A.Status !='Temporary' AND   (   EXISTS
 
         #region 处理开班自动绑定学习记录
         if (await Db.Queryable<Ghre_OpenClass>().Where(x => x.Id == id).AnyAsync() &&
-            await Db.Queryable<Ghre_OpenClassStaff>().Where(x => x.OpenClassId == id && x.StaffId == App.User.StaffId).AnyAsync() &&
             !await Db.Queryable<Ghre_StudyRecord>().Where(x => x.OpenClassId == id && x.StaffId == App.User.StaffId).AnyAsync())
         {
             var openClass = await Db.Queryable<Ghre_OpenClass>().Where(x => x.Id == id).FirstAsync();