diff --git a/Src/Asp.Net/MySqlTest/MySqlTest.csproj b/Src/Asp.Net/MySqlTest/MySqlTest.csproj
index 647453aa8..94a3890c7 100644
--- a/Src/Asp.Net/MySqlTest/MySqlTest.csproj
+++ b/Src/Asp.Net/MySqlTest/MySqlTest.csproj
@@ -86,6 +86,7 @@
     <Compile Include="Models\ViewOrder.cs" />
     <Compile Include="Demo\DemoJ_Report.cs" />
     <Compile Include="UnitTest\UInsert.cs" />
+    <Compile Include="UnitTest\UnitCustom01.cs" />
     <Compile Include="UnitTest\UQueue.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/Src/Asp.Net/MySqlTest/UnitTest/Main.cs b/Src/Asp.Net/MySqlTest/UnitTest/Main.cs
index e92d0cf26..a249b177d 100644
--- a/Src/Asp.Net/MySqlTest/UnitTest/Main.cs
+++ b/Src/Asp.Net/MySqlTest/UnitTest/Main.cs
@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitCustom01.Init();
             Insert();
             Queue();
             CodeFirst();
diff --git a/Src/Asp.Net/MySqlTest/UnitTest/UnitCustom01.cs b/Src/Asp.Net/MySqlTest/UnitTest/UnitCustom01.cs
new file mode 100644
index 000000000..eeefa398d
--- /dev/null
+++ b/Src/Asp.Net/MySqlTest/UnitTest/UnitCustom01.cs
@@ -0,0 +1,117 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    public class UnitCustom01
+    {
+        public static void Init()
+        {
+            var ssc = new SqlSugarClient(new ConnectionConfig()
+
+            {
+ 
+                ConnectionString = OrmTest.Config.ConnectionString,
+
+                DbType = SqlSugar.DbType.MySql, //必填
+
+                IsAutoCloseConnection = true
+
+            });
+            ssc.CodeFirst.InitTables<Student>();
+            var expMethods = new List<SqlFuncExternal>();
+
+            expMethods.Add(new SqlFuncExternal()
+
+            {
+
+                UniqueMethodName = "SumSugar",
+
+                MethodValue = (expInfo, dbType, expContext) =>
+
+                {
+
+                    if (dbType == DbType.SqlServer)
+
+                        return string.Format("SUM({0})", expInfo.Args[0].MemberName);
+
+                    else if (dbType == DbType.MySql)
+
+                        return string.Format("SUM({0})", expInfo.Args[0].MemberName);
+
+                    else
+
+                        throw new Exception("未实现");
+
+                }
+
+            });
+
+            ssc.CurrentConnectionConfig.ConfigureExternalServices = new ConfigureExternalServices()
+
+            {
+
+                SqlFuncServices = expMethods //set ext method
+
+            };
+
+            try
+
+            {
+                ssc.Insertable(new Student() { Age = 1, Createtime = DateTime.Now, Grade = 1, Id = 1, Name = "a", Schoolid = 1 }).ExecuteCommand();
+                ssc.Insertable(new Student() { Age = 1, Createtime = DateTime.Now, Grade = 1, Id = 1, Name = "a", Schoolid = 1 }).ExecuteCommand();
+                var sss12 = ssc.Queryable<Student>().GroupBy(o => o.Name).Select(o => new { Age = SqlFunc.AggregateSum(o.Age)  }).ToList();
+
+            }
+
+            catch (Exception e)
+
+            {
+
+
+
+            }
+        }
+    }
+
+    [SugarTable("unitstudent1111")]
+    public class Student
+    {
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "id", IsPrimaryKey = true, IsIdentity = true)]
+        public int Id { get; set; }
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "schoolid")]
+        public int? Schoolid { get; set; }
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "name")]
+        public string Name { get; set; }
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "createtime")]
+        public DateTime? Createtime { get; set; }
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "age")]
+        public int? Age { get; set; }
+        /// <summary>
+        ///  
+        ///</summary>
+        [SugarColumn(ColumnName = "grade")]
+        public int? Grade { get; set; }
+    }
+
+
+}
diff --git a/Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs b/Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs
index 219cbe93b..9d7eb770c 100644
--- a/Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs
+++ b/Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs
@@ -336,7 +336,7 @@ namespace SqlSugar
                                 addValue = null;
                             }
                         }
-                        else if (item.PropertyType == UtilConstants.IntType)
+                        else if (UtilMethods.GetUnderType(item.PropertyType) == UtilConstants.IntType)
                         {
                             addValue = Convert.ToInt32(addValue);
                         }