add savechanges

Pages/Students/Details.cshtml.cs

@@ -189,6 +189,7 @@ namespace _2021_backend.Pages.Students
             var stu = Context.Students.Find(Student.Guid);
             await Utils.TencentSMS.Send(Context, SMSType.TimeSelect, stu, Context.Users.Find(Guid.Parse(User.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Sid).Value)).Name);
             stu.Status = status.需调整时间;
+            Context.SaveChanges();
             return Construct(Student.Guid.ToString());
         }