diff --git a/Src/Asp.Net/SqlServerTest/Demos/H_ExtEntity.cs b/Src/Asp.Net/SqlServerTest/Demos/H_ExtEntity.cs
index 7e140d7e2..af0c529af 100644
--- a/Src/Asp.Net/SqlServerTest/Demos/H_ExtEntity.cs
+++ b/Src/Asp.Net/SqlServerTest/Demos/H_ExtEntity.cs
@@ -1,11 +1,16 @@
 using SqlSugar;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Data.Linq.Mapping;
 using System.Linq;
 using System.Text;
 
 namespace OrmTest.Demo
 {
+    /// <summary>
+    /// mapping  ef attribute 
+    /// </summary>
     public class ExtEntity: DemoBase
     {
         public static void Init()
@@ -16,22 +21,36 @@ namespace OrmTest.Demo
                 IsAutoCloseConnection = true,
                  ConfigureExternalServices=new ConfigureExternalServices() {
                      EntityService = (property, column) => {
-                         if (property.Name == "xxx") {
+                         if (property.Name == "xxx") {// by name ignore column
                              column.IsIgnore = true;
                          }
-                        //property.GetCustomAttributes
+                         var attributes = property.GetCustomAttributes(true);//get all attributes 
+                           
+                         if (attributes.Any(it => it is KeyAttribute))// by attribute set primarykey
+                         { 
+                             column.IsPrimarykey = true;
+                         }
+                     },
+                     EntityNameService = (type,entity) => {
+                         var attributes = type.GetCustomAttributes(true); 
+                         if (attributes.Any(it => it is TableAttribute))
+                         { 
+                             entity.DbTableName = (attributes.First(it => it is TableAttribute)as TableAttribute).Name;
+                         }
                      }
                  }
             });
      
-            var sql=db.Queryable<StudentTest>().ToSql();
-            var sql2 = db.Insertable<StudentTest>(new StudentTest()).ToSql();
+            var sql=db.Queryable<StudentTest>().ToList();
+            var sql2 = db.Insertable<StudentTest>(new StudentTest()).ExecuteCommand();
         }
 
     }
 
+    [Table(Name ="student")]//default 
     public class StudentTest {
         
+        [Key]
         public string Id { get; set; }
         public string xxx { get; set; }
         public string Name { get; set; }
diff --git a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
index 7f80d23fa..6c5800ef5 100644
--- a/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
+++ b/Src/Asp.Net/SqlServerTest/SqlServerTest.csproj
@@ -39,7 +39,9 @@
       <HintPath>OtherDll\SyntacticSugar.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="System.ComponentModel.DataAnnotations" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Data.Linq" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
diff --git a/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs b/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
index cd2bc6605..fbf77e460 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
@@ -28,6 +28,9 @@ namespace SqlSugar
                     var sugarTable = (SugarTable)sugarAttributeInfo;
                     result.DbTableName = sugarTable.TableName;
                 }
+                if (this.Context.Context.CurrentConnectionConfig.ConfigureExternalServices != null && this.Context.CurrentConnectionConfig.ConfigureExternalServices.EntityNameService != null) {
+                    this.Context.CurrentConnectionConfig.ConfigureExternalServices.EntityNameService(type,result);
+                }
                 result.Type = type;
                 result.EntityName = result.Type.Name;
                 result.Columns = new List<EntityColumnInfo>();
diff --git a/Src/Asp.Net/SqlSugar/Entities/ConnectionConfig.cs b/Src/Asp.Net/SqlSugar/Entities/ConnectionConfig.cs
index b06cb99b4..2c25c7172 100644
--- a/Src/Asp.Net/SqlSugar/Entities/ConnectionConfig.cs
+++ b/Src/Asp.Net/SqlSugar/Entities/ConnectionConfig.cs
@@ -94,5 +94,6 @@ namespace SqlSugar
 
 
         public Action<PropertyInfo, EntityColumnInfo> EntityService{ get; set; }
+        public Action<Type,EntityInfo> EntityNameService { get; set; }
     }
 }