diff --git a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
index 270f065..c1b2ca4 100644
--- a/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/HeartRateReportService.cs
@@ -130,16 +130,21 @@ namespace YD_AllHeartRates.Api.Services.Impl
 
             var classList = await (
                 from c in _sportsContext.Class
-                join s in _sportsContext.ClassAssocTeacher on c.Id equals s.ClassId
-                join t in _sportsContext.Teacher on s.TeacherId equals t.Id
+                join s in _sportsContext.ClassAssocTeacher on c.Id equals s.ClassId into classAssoc
+                from s in classAssoc.DefaultIfEmpty()
+                join t in _sportsContext.Teacher on s.TeacherId equals t.Id into teacherInfo
+                from t in teacherInfo.DefaultIfEmpty()
                 where c.SchoolCode == schoolCode && c.GradeId == gradeId
                 select new ClassListDto
                 {
                     ClassId = c.Id,
                     ClassName = c.ClassName,
                     GradeName = c.GradeName,
-                    TeacherName = t.TeacherName
-                }).OrderBy(x => x.ClassId).ToListAsync();
+                    TeacherName = t != null ? t.TeacherName : null
+                })
+                .OrderBy(x => x.ClassId)
+                .ToListAsync();
+
 
             var studentList = await (
                 from s in _sportsContext.Student
diff --git a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
index e39bcbe..77eb8c4 100644
--- a/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
+++ b/YD_AllHeartRates.Api/Services/Impl/LargeScreenService.cs
@@ -137,7 +137,8 @@ namespace YD_AllHeartRates.Api.Services.Impl
                         StudentName = x.StudentName,
                         Sex = x.Sex,
                         Photo = x.Photo ?? ""
-                    }).ToListAsync();
+                    })
+                    .ToListAsync();
 
                 _caching.AddObject(studentListKey, studentList, 60); // 缓存 8 小时
             }
diff --git a/YD_AllHeartRates.Api/Startup.cs b/YD_AllHeartRates.Api/Startup.cs
index 96ede6a..1a2fac1 100644
--- a/YD_AllHeartRates.Api/Startup.cs
+++ b/YD_AllHeartRates.Api/Startup.cs
@@ -313,13 +313,13 @@ namespace YD_AllHeartRates.Api
             app.UseStaticHttpContext();
             app.UseMiddleware<JwtContextMiddleware>();
 
-            //app.UseSwagger();
-            //app.UseSwaggerUI(c =>
-            //{
-            //    //2个下拉框选项  选择对应的文档
-            //    c.SwaggerEndpoint("/swagger/v1/swagger.json", "YD_AllHeartRates.Api");
-            //    c.RoutePrefix = "";
-            //});
+            app.UseSwagger();
+            app.UseSwaggerUI(c =>
+            {
+                //2个下拉框选项  选择对应的文档
+                c.SwaggerEndpoint("/swagger/v1/swagger.json", "YD_AllHeartRates.Api");
+                c.RoutePrefix = "";
+            });
 
             app.UseRouting();
             app.UseCors();
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
index cedd29a..918077b 100644
--- a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
+++ b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+49a6cb3a6dd561806da8e0157c7126774e0cfda0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+adb7a5132ba408ee1c99d16fb2ead9bed7a7ccc5")]
 [assembly: System.Reflection.AssemblyProductAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyTitleAttribute("YD_AllHeartRates.Api")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
index db60236..7653a50 100644
--- a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
+++ b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.AssemblyInfoInputs.cache
@@ -1 +1 @@
-5e1ce581baeb690fbd907058052a9f7fd6d22c49d7e036c5953449b221cb4b54
+6198966bba43cd9c423a58fba5f3c39b124d08b73c11ccc008ce22ad17ebb10f
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.csproj.AssemblyReference.cache b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.csproj.AssemblyReference.cache
index f77fa8b..9d5d143 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.csproj.AssemblyReference.cache and b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.csproj.AssemblyReference.cache differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll
index 8fec26e..30da94d 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.dll differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb
index 6aad3fc..b3824c3 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb and b/YD_AllHeartRates.Api/obj/Debug/net6.0/YD_AllHeartRates.Api.pdb differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe b/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe
index 1d263bd..f384e24 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe and b/YD_AllHeartRates.Api/obj/Debug/net6.0/apphost.exe differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll
index 27fbb10..28aa0dc 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/ref/YD_AllHeartRates.Api.dll differ
diff --git a/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll b/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll
index 27fbb10..28aa0dc 100644
Binary files a/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll and b/YD_AllHeartRates.Api/obj/Debug/net6.0/refint/YD_AllHeartRates.Api.dll differ
diff --git a/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.dll b/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.dll
index 6dfe1af..7d1e12a 100644
Binary files a/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.dll and b/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.dll differ
diff --git a/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.pdb b/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.pdb
index f45bb85..fc1aba9 100644
Binary files a/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.pdb and b/YD_AllHeartRates.Commons/bin/Debug/net6.0/YD_AllHeartRates.Commons.pdb differ
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfo.cs b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfo.cs
index 6a01eb6..f89d74b 100644
--- a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfo.cs
+++ b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("YD_AllHeartRates.Commons")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+7b9f68a3083ca4505691f4f83599da73c25dca89")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+adb7a5132ba408ee1c99d16fb2ead9bed7a7ccc5")]
 [assembly: System.Reflection.AssemblyProductAttribute("YD_AllHeartRates.Commons")]
 [assembly: System.Reflection.AssemblyTitleAttribute("YD_AllHeartRates.Commons")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfoInputs.cache b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfoInputs.cache
index 8864dc7..a49c922 100644
--- a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfoInputs.cache
+++ b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.AssemblyInfoInputs.cache
@@ -1 +1 @@
-a15d75618d9a5f604592ebd59e64d2979ec0365ce6479e8233cedcc51f5c89ef
+39e19d927f4b3fa147400b1bba96cb47a1b0af113b4d9bd138d8a25b4ed27817
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.dll b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.dll
index 6dfe1af..7d1e12a 100644
Binary files a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.dll and b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.dll differ
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.pdb b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.pdb
index f45bb85..fc1aba9 100644
Binary files a/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.pdb and b/YD_AllHeartRates.Commons/obj/Debug/net6.0/YD_AllHeartRates.Commons.pdb differ
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/ref/YD_AllHeartRates.Commons.dll b/YD_AllHeartRates.Commons/obj/Debug/net6.0/ref/YD_AllHeartRates.Commons.dll
index 600e518..0dedd49 100644
Binary files a/YD_AllHeartRates.Commons/obj/Debug/net6.0/ref/YD_AllHeartRates.Commons.dll and b/YD_AllHeartRates.Commons/obj/Debug/net6.0/ref/YD_AllHeartRates.Commons.dll differ
diff --git a/YD_AllHeartRates.Commons/obj/Debug/net6.0/refint/YD_AllHeartRates.Commons.dll b/YD_AllHeartRates.Commons/obj/Debug/net6.0/refint/YD_AllHeartRates.Commons.dll
index 600e518..0dedd49 100644
Binary files a/YD_AllHeartRates.Commons/obj/Debug/net6.0/refint/YD_AllHeartRates.Commons.dll and b/YD_AllHeartRates.Commons/obj/Debug/net6.0/refint/YD_AllHeartRates.Commons.dll differ